Dr. K. T. Ramakrishna Reddy is a Professor in the department of Physics, College of Sciences, S.V. University, Tirupati. Currently, he is the Vice-Principal of the College of Science and Warden for College of Science Hostels for Men.
Dr. Reddy is specialized in Thin Film and Solar Energy Physics, particularly thin film semiconductor materials for solar photovoltaic and sensor applications. He has a teaching experience of over 30 years and research experience of 35 years.
Dr. Reddy was a recipient of the Best Teacher award (2015) and Scientist Award (2017) from the AP State Government. He has supervised 27 PhDs, 8 MPhils and 43 MSc/MTech projects. He has completed 17 research projects awarded by Indian (UGC, IUC and DST) and foreign (European Commission, Governments of UK, Israel, Russia, Slovenia and Belarus) funding agencies. Dr. Reddy was awarded many coveted research fellowships like the BOYSCAST, Commonwealth, DAAD, EPSRC, JSPS and Marie Curie in addition to INSA, SERC and UGC Visiting Associateships to work on solar energy materials in abroad and within India. These fellowships include collaborative research, exchange visits and teaching in the technology / engineering departments of host institutions.
Dr. Reddy was invited for nomination to the prestigious ‘Eni Award’ for Energy Research in association with Prof. R.W. Miles by the Eni Society, Italy, a rare international recognition for an Indian researcher. He has presented 190 conference presentations, published 230 research papers, 2 UK patents, 3 books and 5 book chapters. He was instrumental in establishing 6 MoUs with foreign Universities in the UK, Japan, Russia, Slovenia and Belarus for exchange of faculty and research students and 1 MoU with the NREDCAP, AP for solar power generation. Many of his papers were very well cited with a total citation of over 7000 along with a H-index of 47 and was listed in top 2% of Indian scientists by AD World Scientific Index – 2023. Some of his research papers were identified as the “Key Scientific Inventions” by the ‘Renewable Energy Global Innovations’, Canada and few were invited to publish in “Research Outreach”. He is a Fellow of AP Academy of Science and life member of many other national and international scientific bodies. He has visited different laboratories in over 20 countries across the world on various assignments.
General Publications
International Journals
- Effect of heat treatment in sulfur on structural, optical and electrical properties of thermally evaporated In2S3 thin films, M.S. Tivanov, I.A. Svito, S. Rasool, K. Saritha, K.T. Ramakrishna Reddy, V. F. Gremenok, Solar Energy 222 (2021) 290-297.
- Fundamental Aspects and Comprehensive Review on Physical Properties of Chemically Grown Tin-Based Binary Sulfides, Sreedevi Gedi, Vasudeva Reddy Minnam Reddy, Tulasi Ramakrishna Reddy Kotte, Chinho Park and Woo Kyoung Kim, Nanomaterials, 11( 2021) 1955 (47 pages)
- Effect of Sulfurization Time on the Physical Properties of Tin (II) Monosulfide Thin Films, Vasudeva Reddy Minnam Reddy, Sreedevi Ged, Rutuja U. Amate, K. T. Ramakrishna Reddy, Woo Kyoung Kim and Chinho Park, Crystals, 11 (2021) 802 (10 pages)
- Influence of post-annealing in sulfur atmosphere on thermally evaporated b-In2S3 films, S. Rasool, K. Saritha, K.T. Ramakrishna Reddy, M.S. Tivanov, V.F. Gremenok, Materials Today: Proceedings 39 (2021) 1985–1988
- Optical and dispersion parameters of co-evaporated SnS7Se0.3 thin films, Saritha K., Rasool S., Ramakrishna Reddy K.T., Tivanov M.S., Materials Today: Proceedings 39 (2021) 1981–1984
- Facile and eco-friendly synthesis of water-soluble Cu2-xSe nanoparticles for photovoltaic applications, Babu Pejjai, Vasudeva Reddy Minnam Reddy, Tulasi Ramakrishna Reddy Kotte, Chinho Park, Materials Science in Semiconductor Processing 112 (2020) 105013
- Determination of carrier lifetime in thermally evaporated In2S3 thin films by light induced transient grating technique
- Rasool, P. Ščajev, K. Saritha1, I. Svito, K. T. Ramakrishna Reddy, M. S. Tivanov, V. Grivickas, Applied Physics A, 126 (2020) 312-317
- Optical and electrical investigations on Cu2SnS3 layers prepared by two-stage process, Phaneendra Reddy Guddeti, P. Mallika Bramaramba Devi, K.T. Ramakrishna Reddy, Chinese Journal of Physics 67 (2020) 458–472.
10. Annealing and plasma treatment effect on structural, morphological and topographical properties of evaporated β-In2S3 films, S Rasool, KSaritha, KT Ramakrishna Reddy, MS Tivanov, VF Gremenok, S P Zimin, AS Pipkova, LAMazaletskiy and II Amirov, Materials Research Express, 7 (2020) 016431 11. Phase controllable synthesis of CuS nanoparticles by chemical co-precipitation method: Effect of precursors on the properties of CuS, P. Babu, S. Muniramaiah, K.T.R. Reddy Materials Chemistry & Physics, 239 (2020) 122030 12. Influence of Bath Temperature on Structural, Optical and Electrical Properties of Cadmium Sulfi de Thin Films Prepared by Chemical Bath Deposition. M. V. Gapanovich, N. A. Tikhonina, T. S. Kokovina, D. N. Varseev, V. V. Rakitin, M. Reddivari, P. Babu, K.T.R. Reddy, G. F. Novikov, Condensed Matter and Interphases, 21 (2019) 490–497 123 Optical investigations on PVA capped SnS nanocrystalline films deposited by CBD process, P Mallika Bramaramba Devi, GPhaneendra Reddy and KT Ramakrishna Reddy, Materials Research Express, 6 (2019) 115523. 14. Effect of Thioacetamide Concentration on the Preparation of Single-Phase SnS and SnS2 Thin Films for Optoelectronic Applications, Sreedevi Gedi, Vasudeva Reddy Minnam Reddy, Salh Alhammadi, Doohyung Moon, Yeongju Seo, Tulasi Ramakrishna Reddy Kotte, Chinho Park and Woo Kyoung Kim, Coatings, 9 (2019) 632. 15. Substrate temperature dependent physical properties of SnS1−xSex thin films, K. Saritha, S. Rasool, K. T. Ramakrishna Reddy, A. M. Saad, M. S. Tivanov, S. E. Tikoto, O. V. Korolik3, V. F. Gremenok, Applied Physics A, (2019) 125:704 16. Optical and electrical properties of thermally co-evaporated SnS1−xSex alloy films, K Saritha, S Rasool, KT Ramakrishna Reddy, MS Tivanov, AV Trofimova and VF Gremenok, Materials Research Express, 6 (2019) 106439. 17. Effect of sulfurization temperature on the efficiency of SnS solar cells fabricated by sulfurization of sputtered tin precursor layers using effusion cell evaporation, Vasudeva Reddy Minnam Reddy a, Haeyun Cho a, Sreedevi Gedi a, K.T. Ramakrishna Reddy b, Woo Kyoung Kim,Chinho Park, J. Alloys & Compounds, 806 (2019) 410-417 18. Effect of deposition time on structural, morphological and optical properties of PVA capped SnS films grown by CBD process. P.M.B. Devi, G Phaneendra Reddy and K.T.Ramakrishna Reddy, Semiconductors, 53 (2019) 15-20. 19. Optoelectronic properties of In2S3 thin films measured using surface photovoltage spectroscopy. S. Rasool, K. Saritha, K.T. Ramakrishna Reddy, L. Bychto, A. Patryn, M. Malinski, M.S. Tivanov and V.F. Gremenok, Materials Research Express, 6 (2019) 076417. 20. Influence of deposition temperature on the efficiency of SnS solar cells. G. Sreedevi, M. Vasudeva Reddy, S.Alhammadi, G. Phaneendra Reddy, K.T. Ramakrishna Reddy, C. Park and W.K. Kim, Solar Energy, 184 (2019) 305-314. 21. Review on Cu2SnS3, Cu3SnS4 and Cu4SnS4 thin films and their photovoltaic performance. M. Vasudeva Reddy, P. Mohan Reddy, G. Phaneendra Reddy, G. Sreedevi, Y.B. Kishore Kumar, P. Babu, W.K. Kim, K.T. Ramakrishna Reddy and C. Park, Journal of Industrial and Engineering Chemistry, 76 (2019) 39–74. 22. Synthesis of binary Cu-Se and In-Se nanoparticle inks using cherry blossom gum for CuInSe2 thin film solar cell applications. P. Babu, M. Vasudeva Reddy, S. Kondaiah, C. Haeyun, P. Mohan Reddy, T.T. Le Trang, D. Jeong, K.T. Ramakrishna Reddy and C. Park, Korean Journal of Chemical Engineering, (2019) . 23. Effect of annealing on the physical properties of thermally evaporated In2S3 thin films. S. Rasool, K. Saritha, K.T. Ramakrishna Reddy, M.S. Tivanov, A.V. Trofimova, S.E. Tikoto, L. Bychto, A. Patryn, M. Malinski and V.F. Gremenok, Current Applied Physics, 19 (2019) 108-113. 24. Effect of C4H6O6 concentration on the properties of SnS thin films for solar cell applications. G. Sreedevi, M. Vasudeva Reddy, K.T. Ramakrishna Reddy, C. Park, W. Kim, Applied Surface Science, 465 (2019) 802-815. 25. A critical study of the optical and electrical properties of transparent and conductiveMo-doped ZnO films by adjustment of Mo-concentration, T. Sreenivasulu Reddy, G. Phaneendra Reddy, K.T. Ramakrishna Reddy, Applied Surface Science, 458 (2018) 333–343 26. Sulfurization temperature dependent physical properties of Cu2SnS3 films grown by a two-stage process, G. Phaneendra Reddy, G.Sreedevi, K.T.Ramakrishna Reddy, Mater. Sci. in Semicond. Processing, 86 (2018) 164-172. 27. Temperature controlled properties of sub-micron thin SnS films, S.N. Nwankwo, S. Campbell, K.T. Ramakrishna Reddy, N.S. Beattie, V. Barrioz and G. Zoppi, Semicond. Sci. & Technol., 33 (2018) 065002. 28. Investigations on the parameters limiting the performance of CdS/SnS solar cell, Ramya, K. T. Ramakrishna Reddy, International Journal of Energy Research, (2018), 1-7. 29. α-SnSe thin film solar cells produced by selenization of magnetron sputtered tin precursors. Vasudeva Reddy, G. Lindwall, P. Babu, G. Sreedevi, K.T. Ramakrishna Reddy, M. Sugiyama, Z.K. Liu and C. Park, Solar Energy Materials and Solar Cells, 176 (2018) 251-258. 30. Physical properties of spray deposited Fe:ZnO thin films. Srinivasulu, K. Saritha and K.T. Ramakrishna Reddy, Materials Today: Proceedings, 4 (14) (2017) 12571 – 12576. 31. Physical properties of Cu2SnS3 thin films prepared by sulfurization of co-sputtered Cu-Sn metallic precursors. Phaneendra Reddy and K.T. Ramakrishna Reddy,Materials Today: Proceedings, 4 (14) (2017) 12518 – 12524. 32. Investigation on optical properties of SnSe2 thin films synthesized by two – stage process. Saritha, A. Suryanarayana Reddy and K.T. Ramakrishna Reddy, Materials Today: Proceedings, 4 (14) (2017) 12512 – 12517. 33. Effect of substrate temperature on structural and optical properties of In2S3 thin films grown by thermal evaporation. Rasool, G. Phaneendra Reddy, K.T. Ramakrishna Reddy, M. Tivanov and V.F. Gremenok, Materials Today: Proceedings, 4 (14) (2017) 12491-12495. 34. Effect of annealing on the structure of the thermal evaporated In2S3 V.F. Gremenok, K.T. Ramakrishna Reddy, M.S. Tivanov and A. Patryn, PRZEGLAD ELEKTROTECHNICZNY (Journal of Electrotechnical Overview), 93 (2017) 89-91 35. A facile and TGA free hydrothermal synthesis of SnS nanoparticles. Gurubhaskar, Narayana T, M. Raghavender, Y.P. Venkata Subbaiah, Hemachandra and K.T. Ramakrishna Reddy, NANO: Brief Reports and Reviews, 12 (10) (2017) 1750120-1750130. 36. Preparation and characterization of Cu2SnS3 thin films by two stage process for solar cell application. G. Phaneendra Reddy and K.T. Ramakrishna Reddy, Materials today: Proceedings, 4 (13) (2017) 12401-12406. 37. Optical properties of thermally evaporated In2S3 thin films measured using photoacoustic spectroscopy. S. Rasool, K. Saritha, K.T. Ramakrishna Reddy, K. Raveendranath Reddy, L. Bychto, A. Patryn, M. Malinski, M.S. Tivanov, V.F. Gremenok, Materials Science in Semiconductor Processing, 72 (2017) 4-8. 38. Synthesis and Characterization of Fe-doped ZnO Thin Films Deposited by Chemical Spray Pyrolysis. T. Srinivasulu, K. Saritha, K.T. Ramakrishna Reddy, Modern Electronic Materials, 3 (2017) 76-85. 39. Sulfurization effect on optical properties of Cu2SnS3 thin films grown by two-stage process. G. Phaneendra Reddy and K.T. Ramakrishna Reddy, AIP Conference Proceedings, 1832 (2017) 120032/1-3. 40. Studies on Chemical Bath Deposited SnS2 films for Cd-free Thin Film Solar Cells, Sreedevi G, Vasudeva Reddy M, Babu P, Park C, Jeon C.W., Ramakrishna Reddy K.T., Ceramics International, 43 (4) (2017) 3713. 41. Chemical bath deposition of Mn-doped ZnS thin films using greener complexing agents: Effect of Mn doping on the optical properties. Pejjai Babu; Minnam Vasudeva Reddy; Seku Kondaiah; Kotte Tulasi Ramakrishna Reddy; Park Chinho, Optik – International Journal for Light and Electron Optics, 130 (2017) 608.
42. Structural and Photoluminescence Properties of Fe-doped ZnO Thin Films. T. Srinivasulu, K. Saritha and K.T. Ramakrishna Reddy, International Journal of Advanced Research, 5 (2017) 958.
43. Influence of acetic acid concentration on the properties of In2S3 films grown by chemical bath deposition. Saritha, S. Rasool, G.Gopinath, K.T. Ramakrishna Reddy and V. Gremenok, ISST Journal of Applied Physics, 7 (2016) 79.
44. Studies on Physical Properties of SnSe2 Thin Films Grown by a Two-Stage Process. Saritha, G. Phaneendra Reddy and K.T. Ramakrishna Reddy, Materials Today: Proceedings 3 (2016) 4128.
45. Optical and spectral analysis of Pr3+doped lithium zinc fluoro telluro phosphate glasses. Parthasaradhi Reddy, V. Naresh and K.T. Ramakrishna Reddy, Materials Today: Proceedings, 3 (2016) 4058-4063.
46. Chemically synthesized Ag-doped SnS films for PV applications. Sreedevi Gedi; Vasudeva Reddy Minnam Reddy, Ramakrishna Reddy K. T.; Soo-Hyun Kim, Chan-Wook Jeon Ceramics International, 42 (16) (2016) 19027.
47. Influence of Different Substrates on the Properties of Sulfurized SnS films. Vasudeva Reddy Minnam Reddy; Sreedevi Gedi; Babu Pejjai; Tulasi Ramakrishna Reddy Kotte; Guillaume Zoppi; Chinho Park, Science of Advanced Materials, 2016, 8, 247.
48. Li2O-LiF-ZnF2-B2O3-P2O5:MnO glasses – Thermal, Structural, Optical and Luminescence Characteristics. Parthasaradhi Reddy, C.; Naresh, V.; Ramakrishna Reddy, K.T., Optical Materials, 2016, 51, 154.
49. A Facile Inexpensive Route for SnS Thin Film Solar Cell with SnS2 Sreedevi Gedi; Vasudeva Reddy Minnam Reddy; Babu P.; Chan-Wook J.; Chinho Park; Ramakrishna Reddy, K.T., Applied Surface Science, 2016, 372, 116.
50. Energy Transfer and Optical Gain properties of P2O5-ZnO-LiF:(Yb3+,Er3+) Glasses. Parthasaradi Reddy, C.; Naresh, V.; Ramakrishna Reddy, K.T.; Buddhudu, S., AIP Conference Proceedings, 2015, 1665, 070017.
51. Effect of Mo-doping Concentration on the Physical Behaviour of Sprayed ZnO Layers. Sreenivasulu Reddy, T.; Vasudeva Reddy, M.; Ramakrishna Reddy, K.T., AIP Conference Proceedings, 2015, 1665, 080026.
52. Development of Sulphurized SnS Thin Film Solar Cells. Vasudeva Reddy Minnam Reddy; Sreedevi Gedi; Chinho Park; Miles, R.W.; Ramakrishna Reddy, K.T., Current Applied Physics, 2015, 15, 588.
53. Synthesis and Characterization of Cu2SnS3 Films Grown by Two-Stage Process. Phaneendra Reddy, G.; Saritha, K.; Ramakrishna Reddy, K.T., International Journal of Advanced Research in Physical Science (IJARPS), 2015, 2, 21.
54. The Effect of Selenization Temperature on Morphological and Structural Properties of Tin Diselenide Thin Films Grown by a Two-Stage Process. Saritha, K.; Phaneendra Reddy, G.; Ramakrishna Reddy, K.T., International Journal of Advanced Research in Physical Science (IJARPS), 2015, 2, 39.
55. Substrate Temperature Influence on the Properties of Sprayed Mo-doped ZnO films. Sreenivasulu Reddy, T.; Vasudeva Reddy, M.; Ramakrishna Reddy, K.T., International J. Advanced Scientific and Technical Research, 2015, 4, 162.
56. Preparation and Characterization of Sprayed Mo-doped ZnO Films. Sreenivasulu Reddy, T.; Vasudeva Reddy, M.; Ramakrishna Reddy, K.T., International Journal of Scientific and Research Publications, 2015, 5, 1.
57. Polycrystalline and Single Phase FeS2 Films Grown by Chemical Bath Deposition. Vedavathi Aluri; Kotte Tulasi Ramakrishna Reddy; Yerpedu Munikrishna Reddy, Nanotechnology Reviews, 2015, 4, 469.
58. Comprehensive Optical Studies on SnS Layers Synthesized by Chemical Bath Deposition. Sreedevi Gedi; Vasudeva Reddy M.; Chinho Park, Jeon Chan-Wook; Ramakrishna Reddy, K.T., Optical Materials, 2015, 42, 468.
59. Effect of Precursor Concentration on Structural and Morphological Properties of Iron Pyrite Thin Films. Vedavathi, A.; Munikrishna Reddy, Y.; Ramakrishna Reddy, K.T., Procedia Materials Science, 2015, 10, 279.
60. Energy Transfer Based Emission Analysis of (Tb3+, Sm3+): Lithium Zinc Phosphate Glasses. Parthasaradhi Reddy, C.; Naresh, V.; Ramaraghavulu, R.; Rudramadevi, B.H.; Ramakrishna Reddy, K.T.; Buddhudu, S., Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015, 144, 68.
61. Photoluminescence study of chemical bath deposited ZnIn2Se4thin film. Babu, P.; Vasudeva Reddy, M.; Ramakrishna Reddy, K.T. Electronic Materials Letters, 2014, 10, 731.
62. Experimental determination of vacuum-level band alignments of SnS-based solar cells by photoelectron yield Spectroscopy. Sugiyama, M.; Shimizu, T.; Kawade, D.; Ramya, K.; Ramakrishna Reddy, K.T. Journal of Applied Physics, 2014, 115, 083508.
63. Growth of polycrystalline In2S3films by chemical bath deposition using acetic acid as complexing agent for solarc cell application. Gopinath,R.; Ramakrishna Reddy, K.T.ISRN Condensed Matter Physics, 2013, 2013, 140230.
64. Effect of Co-doping on the Properties of Zn1-xCoxO Films Deposited by Spray Pyrolysis. Ramakrishna Reddy, K.T.; Supriya, V.; Sugiyama, M. Surface and Coatings Technology, 2013, 23, 149.
65. Influence of bath temperature on the properties of In2S3 films grown by chemical bath deposition. Gopinath, G.R.; Miles, R.W.; Ramakrishna Reddy, K.T. Energy Procedia, 2013, 34, 399.
66. Thickness dependent physical properties of coevaporated Cu2SnS4 Geetha Vani, V.P.; Vasudeva Reddy, M.; Ramakrishna Reddy, K.T. ISRN Condensed Matter Physics, 2013, 2013,142029.
67. Influence of deposition time on the properties of highly-oriented SnS films prepared using the thermal evaporation method. Nwofe, P.A.; Ramakrishna Reddy, K.T.; Miles, R.W. Advanced Materials Research, 2013, 602, 1409.
68. Influence of Source – Substrate Distance of Cu4SnS4 Thin Films Grown by Co-evaporation. Geetha Vani, V.P.; Vasudeva Reddy, M.; Ramakrishna Reddy, K.T. Advanced Materials Research, 2013, 768, 103.
69. Dependence of optical properties of chemical bath deposited SnS2 films on deposition time. Sreedevi, G.; Ramakrishna Reddy, K.T. Journal AIP Conf. Proc., 2013, 1512, 688.
70. Determination of the Minority Carrier Diffusion Length of SnS Using Electro-Optical Measurements. Ramakrishna Reddy, K.T.; Nwofe, P.A.; Miles, R.W. Electronic Materials Letters, 2013, 9, 363.
71. Thickness Effect on the Structural and Optical Properties of SnS2 Films Grown by CBD Process. Ramakrishna Reddy, K.T.; Sreedevi, G.; Miles, R.W.Journal of Materials Science and Engineering A, 2013, 3, 182.
72. Influence of sulfurization temperature on physical properties of Cu2ZnSnS4 thin films. Narayana, T.; Venkata Subbaiah, Y. P.; Prathap, P.; Reddy, Y.B.K.; Ramakrishna Reddy, K.T.Journal of Renewable and Sustainable Energy, 2013, 5, 031606.
73. X-ray photoelectron spectroscopy and X-ray diffraction studies on tin sulfide films grown by sulfurization process. Reddy, M.V.; Babu, P.; Ramakrishna Reddy, K.T.; Miles, R.W.Journal of Renewable and Sustainable Energy, 2013, 5, 031613.
74. Properties of thermally evaporated SnS thin films for applications in solar cell devices. Nwofe, P.A.; Ramakrishna Reddy, K.T.; Miles, R.W. Journal of Renewable and Sustainable Energy, 2013, 5, 011204.
75. Structural and Optical Properties of SnS Films Grown by Thermal Evaporation Method.Nowfe, P.; Ramakrishna Reddy, K.T.; Tan, J.K.; Forbes, I.; Miles, R.W.J. Physics: Conf. Series, 2013, 417, 012039.
76. Preparation and properties of Cu4SnS4 thin films. Geetha Vani, V.P.; Miles, R.W.; Ramakrishna Reddy, K.T. International Journal of Optoelectronic Engineering, 2013, 3, 1.
77. Ni-doping effect on the structural and optical properties of sprayed ZnO thin films. Rajendraprasad Reddy, M.; Sugiyama, M.; Ramakrishna Reddy, K.T. Advanced Materials Research, 2013, 602-604, 1423.
78. Influence of deposition time on the properties of highly-oriented SnS thin films prepared using the thermal evaporation method. Nwofe, P.A.; Ramakrishna Reddy, K.T.; Miles, R.W. Advanced Materials Research, 2013, 602-604, 1409.
79. Structural, optical and electro-optical properties of thermally evaporated SnS layers. Nowfe, P.; Ramakrishna Reddy, K.T.; Sreedevi, G.; Tan, J.K.; Forbes, I.; Miles, R.W.Japanese J. Applied Physics, 2012, 51,10NC36.
80. Crystalline behaviour of SnS layers produced by sulfurization of Sn films using H2 Ramakrishna Reddy, K.T.; Reddy, M.V.; Leach, M.; Tan, J.K.; Jang, D.Y.; Miles, R.W. Journal AIP Conference Series, 2012, 1447, 709.
81. Microstructure, magnetic and electrical properties of sprayed ZnCoO films.Supriya, V.; Sugiyama, M.; Uthanna, S.; Ramakrishna Reddy, K.T.Journal AIP Conference Series, 2012, 1447, 659.
82. Conversion of evaporated In2S3 layers into In2O3 by air annealing. Gopinath, G.R.; Revathi, N.; Uthanna, S.; Ramakrishna Reddy, K.T. Journal AIP Conference Series, 2012, 1447, 635.
83. Physical properties of ZnxCd1-xS nanocrytalline layers synthesized by solution growth method. Nagamani, K.; Reddy, M.V.; Lingappa, Y.; Ramakrishna Reddy, K.T.; Miles, R.W. International J. Optoelectronic Engg., 2012, 2 ,1.
84. Thickness dependent optical properties of thermally evaporated SnS thin films. Nwofe, P.A.; Ramakrishna Reddy, T.; Tan, J.K.; Forbes, I.; Miles, R.W. Physics Procedia, 2012, 25, 150.
85. Characterization of ‘Al’ co-doped Zn1-xMnxO films deposited by spray pyrolysis. Rajamohana Reddy, L.; Revathi, N.; Murata, Y.; Sugiyama, M.; Ramakrishna Reddy,K.T.,Physics Procedia, 2012, 25, 143.
86. Properties of Al-doped ZnS films grown by chemical bath deposition. Nagamani,; Prathap, P.; Lingappa, Y.; Miles, R.W.; Reddy, K.T.R., Physics Procedia, 2012, 25, 137.
87. Tin sulphide thin films synthesized using a two step process. Leach, M.; Ramakrishna Reddy, K.T.; Reddy, M.V.; Tan, J.K.; Jang, S.; Miles, R.W.Energy Procedia, 2012, 15, 371.
88. Physical Properties of Nano-crystalline SnS2 Layers Grown by Chemical Bath Deposition. Ramakrishna Reddy, K.T.; Sreedevi, G.; Ramya, K.; Miles, R.W. Energy Procedia, 2012, 15, 340.
89. Single phase, large grain, p-conductivity type SnS layers produced using thermal evaporation. Nwofe, P.;Ramakrishna Reddy, K.T.; Sreedevi, G.; Tan, K.J.; Forbes, I.; Miles, R.W. Energy Procedia, 2012, 15, 354. Note: This article has been identified as one of the “Key Scientific Articles” published in that month by ‘Renewable Energy Global Innovations’, Canada, a Centre that brings in top innovations around the world in Renewable Energy Research and Technology.
90. Al-doped ZnS layers synthesized by solution growth method. Nagamani, K.; Revathi, N.; Prathap, P.; Lingappa, Y.; Ramakrishna Reddy, K.T.Current Applied Physics, 2012, 12, 380.
91. Precursor concentration effect on the properties of ZnIn2Se4 layers grown by chemical bath deposition. Babu, P.;Ramakrishna Reddy, K.T.; Miles, R.W.Energy Procedia, 2011, 10, 177. Note: This article has been identified as one of the “Key Scientific Articles” published in that month by ‘Renewable Energy Global Innovations’, Canada, a Centre that brings in top innovations around the world in Renewable Energy Research and Technology. 91.
92. Studies on the energy band discontinuities in SnS/ZnMgO thin film heterojunction. Ramakrishna Reddy, K.T.; Ramya, K.; Sreedevi, G.; Shimizu, T.; Murata, Y.; Sugiyama, M. Energy Procedia, 2011, 10, 172.
93. Synthesis of conducting Zn1-xMgxO:Al layers by spray pyrolysis for photovoltaic applications. Prathap, P.; Revathi, N.; Suryanarayana Reddy, A.; Subbaiah, Y.P.V.; Ramakrishna Reddy, K.T. Thin Solid Films, 2011, 519, 7592.
94. Annealing studies and electrical properties of SnS-based solar cells. Ogah, O.; Ramakrishna Reddy, K.T.; Zoppi, G.; Forbes, I.; Miles, R.W.; Thin Solid Films, 2011, 519, 7425.
95.Band offset of SnS solar cell structure measured by X-ray photoelectron spectroscopy. Sugiyama, M.; Reddy, K.T.R.; Revathi, N.; Shimamoto, Y.; Murata, Y.Thin Solid Films, 2011, 519, 7429.
96. Sulfurization growth of SnS thin films and determination of valence band offset for SnS – related solar cells. Sugiyama, M.; Murata, T.; Ramya, K.; Sato, T.; Ramakrishna Reddy, K.T., Japanese J. Applied Physics, 2011, 50, 05FH03.
97. Raman, Magnetic and Electrical Properties of Sprayed Zn1−xMnxO Films. Raja Mohan Reddy, L.; Revathi, N.; Prathap, P.; Ramakrishna Reddy, K.T.AIP Conf. Proc., 2011, 1349, 751.
98. Effect of pH on the physical properties of ZnIn2Se4 thin films grown by chemical bath deposition. Babu, P.; Reddy, M.V.; Revathi, N.; Ramakrishna Reddy, K.T., J. Nano-Electron Physics, 2011, 3, 85.
99. Structural and optical properties of cobalt doped sprayed ZnO films. Supriya, V.; Sato, T.; Sugiyama, M.; Reddy, K.T.R.,Journal of Optoelectronics and Advanced Materials: Rapid Communication, 2010, 4,
100. Characterization of novel sprayed Zn1-xMgxO films for photovoltaic application. Prathap, P.; Suryanarayana Reddy, A.; Reddy, G.R.; Miles, R.W.; Ramakrishna Reddy, K.T.Solar Energy Materials and Solar Cells, 2010, 94, 1434.
101. Synthesis and characterization of In2S3 nanocrystalline material for photovoltaic application. Revathi, N.; Prathap, P.; Ramakrishna Reddy, K.T. Energy Procedia, 2010, 2 , 195.
102. Annealing effect on the structural, opto-electronic properties of sprayed Zn1-xMgxO films. Prathap, P.; Revathi, N.; Suryanarayana Reddy, A.; Ramakrishna Reddy, K.T.Physica Status Solid. A, 2010, 207, 1609.
103. Annealing effect on the Physical properties of evaporated In2S3 Revathi, N.; Prathap, P.; Miles, R. W.; Ramakrishna Reddy, K.T.Solar Energy Materials and Solar Cells, 2010, 94, 1487.
104. Substrate temperature dependent physical properties of sprayed Zn76Mg0.24O films. Prathap, P.; Reddy, A.S.; Revathi, N.; Subbaiah, Y.P.V. ;Ramakrishna Reddy, K.T.J. Mater. Sci.: Mater.in Electronics, 2010, 21, 393.
105. Mg-composition induced effects on the physical properties of sprayed Zn1-xMgxO films. Ramakrishna Reddy, K.T.;Prathap, P.; Revathi, N.; Reddy, A.S.; Miles, R.W. Thin Solid Films, 2009, 518, 1275.
106. Thickness dependence of structure and optoelctronic properties of sprayed In2O3: Mo films. Prathap, P.; Revathi, N.; Ramakrishna Reddy, K.T.; Miles, R.W. Thin Solid Films, 2009, 518, 1271.
107. Thickness dependent physical properties of close space evaporated In2S3 Revathi, N.; Prathap, P.; Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T.SolidState Sciences, 2009,11,1288.
108. Influence of substrate temperature on physical properties of sprayed Zn85Mn0.15O films. Raja Mohan Reddy, L.; Prathap, P.; Ramakrishna Reddy, K.T.Current Applied Physics, 2009, 9, 667.
109. Preparation and characterization of transparent conducting ZnS:Al films. Prathap, P.; Revathi, N.; Subbaiah, Y.P.V.; Ramakrishna Reddy, K.T.; Miles, R.W. Solid State Sciences, 2009, 11, 224.
110. Substrate temperature dependent physical properties of In2S3 films. Revathi,; Prathap, P.; Subbaiah, Y.P.V.; Ramakrishna Reddy, K.T.; Miles, R.W. J. Physics D: Applied Physics, 2008, 41, 155404.
111. Growth and physical behavior ofZn1-xMgxO Reddy, A.S.; Prathap, P.; Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T.; Yi J. Thin Solid Films, 2008, 516, 7084.
112. Studies on ZnS5Se0.5 buffer based thin film solar cells. Subbaiah, Y.P.V.; Prathap, P.; Ramakrishna Reddy, K.T.; Miles, R.W.; Yi J. Thin Solid Films, 2008, 516, 7060.
113. Synthesis and physical behaviour of In2S3 films. Revathi, N.; Prathap, P.; Ramakrishna Reddy, K.T.; Applied Surface Science, 2008, 254, 5291.
114. Thickness effect on the microstructure, morphology and optoelectronic properties of ZnS films. Prathap, P.; Revathi, N.; Subbaiah, Y.P.; Ramakrishna Reddy, K.T.; Miles, R.W. J. Physics: Condensed Matter, 2008, 20, 035205.
115. Growth and characterization of indium oxide films. Prathap, P., Gowri Devi, G., Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T.; Ganesan, V. Current Applied Physics, 2008, 8, 120.
116. Structural and optical properties of sprayed Zn1−xMnxO films. Rajamohan Reddy, L.; Prathap, P.; Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T.; Yi Solid State Sciences, 2007, 9, 718.
117. Influence of growth rate on microstructure and optoelectronic behaviour of ZnS films. Prathap, P.; Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T.; Miles, R.W.Journal of Physics D: Applied Physics, 2007, 40, 5275.
118. Growth and Characterization of ZnSxSe1-x films deposited by Close-spaced evaporation. Subbaiah, Y.P.V.; Prathap, P.; Mangalaraj, D.; Ramakrishna Reddy, K.T.; Yi J. Journal of Physics D: Applied Physics, 2007, 40, 3683.
119. Physical behaviour of nanocrystalline ZnS layers grown by close-spaced evaporation. Prathap, P.; Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T. Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 2007, 37, 493.
120. Preparation and characterisation of sprayed SnS films grown at different precursor concentrations. Koteeswara Reddy, N.; Ramakrishna Reddy, K.T.nMaterials Chemistry and Physics, 2007, 102, 13.
121. Influence of precursor molarity on physical properties of sprayed In2O3 Prathap, P.; Subbaiah, Y.P.V.; Ramakrishna Reddy, K.T., J.Optoelectonics and Advanced Materials: Rapid Communications, 2007, 1, 252.
122. Thickness effect on physical properties of evaporated SnS films. Devika, M.; Reddy, N. K.; Ramesh, K.; Ganesan, V.; Gopal, E.S.R.; Reddy, K.T.R. Journal of the Electrochemical Society, 2007, 154, H67.
123. The effect of substrate surface on the physical properties of evapo-rated SnS films. Devika, M.; Reddy, N. K.; Ramesh, K.; Ganesan, P.; Gopal, E.S.R.; Ramakrishna Reddy, K.T. Semicond. Sci. and Technol., 2006, 21, 1495.
124. Optical properties of In2O3 films prepared by spray pyrolysis. Pratap, P.; Subbaiah, Y.P.V.; Devika, M.; Ramakrishna Reddy, K.T. Materials Chemistry and Physics, 2006, 100, 375.
125. Structural and Optical Properties of ZnS Films Deposited by Close-spaced Evaporation. Venkata Subbaiah, Y.P.; Prathap, P.; Ramakrishna Reddy, K.T. Applied Surface Science, 2006, 253, 2409.
126. Influence of substrate temperature on structure and electrical resistivity of evaporated SnS films. Devika, M.; Reddy, N. K.; Ramesh, K.; Gopal, E.S.R.; Ramakrishna Reddy, K.T. Applied Surface Science, 2006, 253, 1673.
127. Photovoltaic properties of SnS bases solar cells. Ramakrishna Reddy, K.T.; Koteswara Reddy, N.; Miles, R.W. Solar Energy Materials and Solar Cells, 2006, 90, 3041.
128. Influence of annealing on physical properties of evaporated SnS films. Devika, M.; Reddy, N. K.; Ramesh, K.; Ganesan, P.; Gopal, E.S.R.; Ramakrishna Reddy, K. T. Semiconductor Science and Technology, 2006, 21, 1125.
129. Synthesis and characterisation of co-evaporated tin sulphide thin films. Reddy, N.K.; Ramesh, K.; Ganesan, R.; Reddy, K.T.R.; Gunasekar, K.R.; Gopal, E.S.R. Applied Physics A: Mater. Sci. & Processing, 2006, 83, 133.
130. Low resistive micron-thick SnS:Ag films for optoelectronic applications. Devika, M.; Reddy, N.K.; Ramesh, K.; Ganesan, P.; Gopal, E.S.R.; Ramakrishna Reddy,K.T. Journal of Electrochemical Society, 2006, 153, G727.
131. Optical behaviour of sprayed tin sulphide thin films. Koteswara Reddy, N.; Ramakrishna Reddy, K.T. Materials Research Bulletin, 2006, 41, 414.
132. Electrical properties of spray pyrolytic tin sulphide thin films. Koteswara Reddy, N.; RamakrishnaReddy, K.T.; SolidState Electronics, 2005, 49, 902.
133. Structural behaviour ofZnSxSe1-x films deposited by close-spaced evaporation. Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T. Mater. Chem. and Phys. 2005, 92, 448.
134. Close-spaced evaporated ZnSe films: Preparation and characterization. Venkata Subbaiah, Y.P.; Pratap, P.; Devika, M.; Ramakrishna Reddy, K.T. Physical B: Condensed Matter, 2005, 365, 240.
135. SnS films photovoltaic applications: Physical investigations on sprayed SnxSy Koteswara Reddy, N.; Ramakrishna Reddy, K.T.Physica B: Condensed Matter, 2005, 368, 25.
136. Highly Transparent and conducting CdO films grown by chemical spray pyrolysis. Ramakrishna Reddy, K.T.; Shanthini, G.; Johnston, D.; Miles, R.W. Thin Solid Films, 2003, 427, 397.
137. Surface Characterisation of Sprayed CuGaxIn1-xSe2 Ramakrishna Reddy, K.T.; Miles, R.W. J. Mater. Sci. : Mater. In Electronics, 2003, 14, 529.
138. RF Sputtering of high quality Cu/In layers and conversion toCuInSe2 using sulpurisation process. Forbes, I.; Ramakrishna Reddy, K.T.; Johnston, D.; Miles, R.W.; Lane, D.W.; Rogen, K.; Chapum, A. J.Mater.Sci. : Mater.in Electronics, 2003, 14, 567.
139. Pyrolytic spray deposition of ZnSxSe1-xlayers for photovoltaic applications. Ramakrishna Reddy, K.T.; Subbaiah, Y.P.V.; Reddy, T.B.S.; Johnston, D.; Forbes, I; Miles, R.W. Thin Solid Films, 2003, 340, 431.
140. Highly oriented and conducting ZnO:Ga layers grown by chemical spray pyrolysis. Ramakrishna Reddy, K.T.; Reddy, T.B.S.; Forbes, I.; Miles, R.W. Surface Coatings Technology, 2002, 110, 151.
141. Formation of polycrystalline SnS layers by a two-step process. Ramakrishna Reddy, K.T.; Purandhara Reddy, P.; Datta, P.K.; Miles, R.W. Thin Solid Films, 2002, 116, 403.
142. Chemical bath deposition of zinc sulphide based buffer layers using low toxicity materials. Johnston, D.A.; Carletto, M.H.; Reddy, K.T.R.; Forbes, I.; Miles, R.W. Thin Solid Films, 2002, 102, 403.
143. Structural studies on SnS films grown by a two step process, Ramakrishna Reddy, K.T.; Purandhara Reddy, P. Materials Lett., 2002, 56, 108.
144. Optical absorption studies on Cu5Ag0.5InSe2 thin films. Rao, G.V.; Chandra, G.H.; Reddy, P.S.; Hussain, O.Md.; Reddy, K.T.R.; Utthanna, S. Vaccum, 2002, 67, 293.
145. Influence of substrate temperature on structural and optical properties of Cu5Ag0.5InSe2 films. Rao, G.V.; Chandra, G.H.; Reddy, P.S.; Hussain, O.Md.; Reddy, K.T.R.; Uthanna, S. Journal of Optoelectronics and Advanced Materials, 2002, 4, 387.
146. Investigations on the sulphur incorporation in sputtered Cu, In multilayer precursors. Ramakrishna Reddy, K.T.; Miles, R.W.; Forbes, I. Appl. Surface Sci., 2001, 387, 169.
147. Characterisation of inorganic materials with photo acoustic spectrometry. Ramakrishna Reddy, K.T.; Slifkin, M.A.; Weiss, A.W. Optical Materials, 2001, 16, 87.
148. Photoacoustic spectroscopy of sprayed CuGaInSe2 thin films. Ramakrishna Reddy, K.T.; Chalapathy, R.B.V.; Slifkin, M.A.; Weiss, A.W.; Miles, R.W. Thin Solid Films, 2001, 387, 205.
149. Investigations on SnS films deposited by spray pyrolysis, Ramakrishna Reddy, K.T.; Purandar Reddy, P.; Miles, R.W.; Datta, P.K., Optical Materials, 2001, 17, 295.
150. Chemical Bath Deposition of ZnS Films using Sod. Citrate as a Complementary Complexing Agent. Johnston, D.; Ramakrishna Reddy, K.T.; Forbes, I.; Miles, R.W. J. Mater. Sci. Lett., 2001, 20, 921.
151. Effect of gallium incorporation on the physical properties of ZnO films grown by spray pyrolysis. Ramakrishna Reddy, K.T.; Gopalaswamy, H.; Miles, R.W. J. Crystal Growth, 2000, 210, 516.
152. Detection of crystalline phases in CuInSe2 films grown by a two-step process. Ramakrishna Reddy, K.T.; Datta, P.K.; Carter, M.J. Physica Status Solid a, 2000,182, 679.
153. Structural properties of CuGaxIn1-xSe2 thin films deposited by spray pyrolysis. Ramakrishna Reddy, K.T.; Chalapathy, R.B.V. Cryst. Res. & Technol., 1999, 34, 3.
154. Structural properties of sprayed SnS thin films. Koteswara Reddy, N.; Ramakrishna Reddy, K.T., J. Phys. D: Appl. Phys., 1999, 32, 988.
155. Preparation of CuInS2 thin films by sulphurising sputtered Cu-In multilayers. Miles, R.W.; Ramakrishna Reddy,K.T.; Forbes, I. J. Crystal Growth, 1999, 198/199, 316.
156. Studies on polycrytalline p-CuGa2In0.8Se2/n-CdO thin film solar cells. Chalapathy, R.B.V.; Subramanyam, T.K.; Uthanna, S.; Ramakrishna Reddy, K.T. Phys. Low-Dim. Struc., 1999, 5/6, 105.
157. Preparation and properties of sprayed CuGa5In0.5Se2 thin films. Ramakrishna Reddy, K.T.; Chalapathy, R.B.V. Solar Energy Mater. & Solar Cells, 1998, 50, 19.
158. Characterisation of CdO thin films deposited by activated reactive evaporation. Ramakrishna Reddy K.T.; Sravani, C.; Miles, R.W. J. Crystal Growth, 1998, 184/185,1031.
159. Growth and characterisation of sprayed ZnO:Ga thin films. Ramakrishna Reddy, K.T.; Miles, R.W., J. Mater. Sci. Letts., 1998, 17, 279.
160. Chemical spray pyrolysis of CuGaSe2 thin films. Chalapathy, R.B.V.; Ramakrishna Reddy, K.T., Advances in Mater. Sci. & Technol., 1998, 1, 1.
161. Studies on n-CdS/p-SnS thin film heterojunction solar cells. Koteswara Reddy, N.; Ramakrishna Reddy, K.T. Phys. Low Dim. Structures, 1998, 5/6, 93.
162. Growth of polycrystalline SnS films by spray pyrolysis. Koteswara Reddy, N.; Ramakrishna Reddy, K.T. Thin Solid Films, 1998, 325, 4.
163. Growth of CuInSe2 films by selenising sputtered Cu-In bilayers using closed graphite box. Ramakrishna Reddy, K.T.; Forbes, I.; Carter, M.J. Letts., 1998, 37, 57.
164. Investigations on polycrystalline CuGaTe2 thin films.Sesha Reddy, M.; Ramakrishna Reddy, K.T.; Hussain, O.Md.; Reddy, P.J. Thin Solid Films, 1997, 292, 14.
165. Structural properties of CuGaTe2 thin films. Sesha Reddy, M.; Ramakrishna Reddy, K.T.; Jayarama Reddy, P.J. Mater. Sci. Letts., 1996, 15, 712.
166. Photovoltaic behaviour of CdS/CuGaSe2 heterojunctions. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Phys. Low-Dim. Structures, 1996, 1, 151.
167. Characterisation of two source evaporated cadmium zinc telluride films. Prasada Rao, K.; Hussain, O.Md.; Reddy, K.T.R.; Reddy, P.S.; Uthanna, S.; Naidu, B.S.; Reddy, P.J. Optical Mater, 1996, 5, 63.
168. Electrical properties of CuGaTe2 films. Sesha Reddy, M.; Ramakrishna Reddy, K.T.; Naidu, B.S.; Reddy, P.J. J. Mater. Chem & Phys, 1996, 44, 281.
169. Structural and optical properties of Cd1-xZnxTe thin films. Prasada Rao, K.; Hussain, O.Md.; Reddy, K.T.R.; Reddy, P.S.; Uthanna, S.; Naidu, B.S.; Reddy, P.J. J. Alloys & Compounds, 1995, 218, 86.
170. Optical absorption studies in molybdenum trioxide films. Sabhapathi, V. K.; Hussain, O.Md.; Reddy, P.S.; Reddy, K.T.R.; Uthanna, S.; Naidu, B.S.; Reddy, P.J. Phys. Stat Solidi (a), 1995, 148, 167.
171. Optical constants of polycrystalline CuGaTe2 films. Sesha Reddy, M.; Ramakrishna Reddy, K.T.; Naidu B.S.; Reddy, P.J., Optical Mater., 1995, 4, 787.
172. Preparation and characterization of sprayed CdO thin films. Sravani, C.; Ramakrishna Reddy, K.T.; Jayarama Reddy, P. J. Mater. Sci. Letts., 1994, 13, 1045.
173. Preparation and characterisation of CdO/CdTe heterojunctions. Sravani, C.; Reddy, K.T.R.; Hussain, O.Md.; Jayarama Reddy, P. Alloys & Compounds, 1994, 215, 239
174. Investigations on n-CdO/p-CdTe thin film heterojunctions. Sravani, C.; Reddy, K.T.R.; Hussain, O.Md.; Jayarama Reddy, P. Thin Solid Films, 1994, 253, 339.
175. Characterization of thin films ZnO/ZnCdS/CuGaSe2 heterojunctions. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Thin Solid Films, 1994, 253, 238.
176. Influence of oxygen partial pressure on the physical behaviour of CdO films prepared by ARE. Sravani, C.; Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Mater. Letts., 1993, 15, 356.
177. Electrical properties of laser evaporated CuGaSe2 thin films. Ramakrishna Reddy, K.T.; Jayarama Reddy, P.J. Mater. Chem. & Phys., 1992, 31, 263.
178. Studies on ZnCdS films and ZnCdS/CuGaSe2 thin film solar cells. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. J. Phys. D: Appl. Phys., 1992, 25, 1345.
179. Polycrystalline CuGaSe2 film solar cells. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Vacuum, 1992, 43, 811.
180. Preparation and properties of laser evaporated CuGaSe2 thin films.Ramakrishn Reddy, K.T.; Jayarama Reddy, P. Crystal Growth, 1991, 108, 765.
181. Fabrication and performance of polycrystallineZnCdS/CuGaSe2 thin film solar cells. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. J. Mater. Sci. Letts., 1991, 10, 439.
182. Physical behaviour of CdO films prepared by activated reactive evaporation. Sravani, C.; Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Semicond. Sci. & Technol., 1991, 6, 1036.
183. Polycrystalline CuGaSe2 films for solar energy conversion. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Mater. Letts., 1990, 10, 275.
184. Electrical transport behaviour of CdS/CuGaSe2 thin film hererojunctions. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Mater. Letts., 1990, 9, 227.
185. Optical absorption in laser evaporated thin films of CuGaSe2. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. J. Mater. Sci. Letts., 1989, 8, 110.
186. Photoconductive response of laser evaporated CuGaSe2 thin films. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Solid State Communications, 1989, 69, 693.
National Journals
- Magnetic behavior of sprayed Zn85Mn0.15O layers. Reddy, L.R.M.; Prathap, P.; Ramakrishna Reddy, K.T. Solid State Physics (India), 2008, 53, 1115.
- Effect of Film Thickness on Electrical Properties of In2S3 Revathi N.; Prathap P.; Ramakrishna Reddy K.T. Solid State Physics, 2008, 53, 683.
- Crystalline properties of sprayed Zn1-xMnxO films. Reddy, L.R.M.; Prathap, P.; Ramakrishna Reddy, K.T. Solid State Physics, 2006, 51, 507.
- Crystalline properties of sprayed Zn1-xMgxO films. Suryanarayana Reddy, A.; Prathap, P.; Ramakrishna Reddy, K.T. Solid State Physics, 2006, 51, 499.
- Sulphurisation of Cu/In multi-layers; Structural properties. Prathap, P.; Venkata Subbaiah, Y.P.; Ramakrishna Reddy, K.T. Solid State Physics 2006, 51, 481.
- Investigations on the structural properties of evaporated SnS films. Koteswara Reddy, N.; Devika, M.; Ramesh, K.; Reddy, K.T.R.; Gunasekar, K.R.; Gopal, E.S.R. Solid State Physics, 2005, 50, 373.
- Investigations on Structural Properties of Sprayed In2O3 films. Shantini, G.M.; Subbaiah, Y.P.V.; Reddy, N.K.; Reddy, K.T.R. Solid State Physics, 2004, 49, 484.
- Effect of sputtering pressure on the physical properties of dc magnetron sputtered CdO films. Subramanyam, T.K.; Venkata Rao, G.; Ramakrishna Reddy, K.T.; Uthanna, S. Indian J. Engineering & Material Science, 2003, 10, 51.
- Investigations on CuInS2 films grown by a twostep process. Balasubramanyam Reddy, T.; Uthanna, S., Ramakrishna Reddy, K.T., J. Instruments Society of India, 2001, 31, 227.
- 10. Preparation and Characterisation of SnS Layers by Sulphurisation of Metal Precursors. Purandhara Reddy, P.; Uthanna, S.; Ramakrishna Reddy, K.T. Instruments Society of India, 2001, 31, 144.
11.Highly Oriented, Large Grain CdTe Thin Films Grown by a Close Spaced Evaporation Process. Ramakrishna Reddy, K.T.; Hisek, J.; Miles, R.W., J. Instruments Society of India, 2001, 31, 28.
12. Polycrystalline thin film CdO/CdTe solar cells. Sravani, C.; Reddy, K.T.R.; Hussain, O.Md.; Jayarama Reddy, P. Solar Energy Society of India Journal, 1996, 6, 1.
13. Influence of substrate temperature on the electrical properties of sprayed CdO thin films. Sravani, C.; Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Solid State Physics, 1995, 38C, 176.
14. Infrared transmission studies on CuGaTe2 thin films. Ramakrishna Reddy, K.T.; Sesha Reddy, M.; Jayarama Reddy, P. Solid State Physics, 1995, 38C, 89.
15. Physical properties of CuGaTe2 thin films. Sesha Reddy, M.; Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Solid State Physics, 1994, 37C, 193.
16. Electrical properties of sprayed ZnO:In thin films. Ramakrishna Reddy, K.T.; Raghupathi Chetty, G.; Jayarama Reddy, P., Solid State Physics, 1994, 36C, 339.
17. Physical properties of CdS/CuGaSe2 heterojunction solar cells. Ramakrishna Reddy, K.T.; Jayarama Reddy, P., Solid State Physics, 1993, 35C, 464.
18. Physical properties of flash evaporated CuGaSe2 thin films. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Solid State Physics, 1992, 34C, 464.
19. Influence of excess copper on the electrical properties of CuGaSe2 Ramakrishna Reddy, K.T.; Jayarama Reddy, P., Solid State Physics, 1991, 33C, 462.
20. Structural studies on laser evaporated CuGaSe2 films. Ramakrishna Reddy, K.T.; Jayarama Reddy, P., B. Electrochem., 1989, 5, 221.
21. Optical and photoconductive studies in laser evaporated CuGaSe2. Ramakrishna Reddy, K.T.; Jayarama Reddy, P. Solid State Physics, 1988, 31C, 368.
Proceedings (International)
- A. Nowfe, K. T. Ramakrishna Reddy, G. Sreedevi, J.K. Tan, I. Forbes and R.W. Miles
Structural, optical and electro-optical properties of thermally evaporated SnS layers
Proc. 21st Photovoltaic Science and Engineering Conf., Fukuoka, Japan (2011) p. 451-454.
- T. Ramakrishna Reddy, P. Babu, R. W. Miles
CBD ZnIn2Se4 as buffer layer for CuInGaSe2 thin film solar cells
Proc. 21st Photovoltaic Science and Engineering Conf., Fukuoka, Japan (2011) p1572-1576.
- Revathi, P. Prathap, R.W. Miles and K.T. Ramakrishna Reddy
Annealing effect on the physical properteis of evaporated In2S3 films
Proc.18th Photovoltaic Science and Engineering Conf., Kolkata, India (2009) p.782-785.
- Suryanarayana Reddy P. Prathap, G. R. Reddy, R.W. Miles4 and K.T. Ramakrishna Reddy,
Characterization of sprayed Zn1-xMgxO films for photovoltaic application
Proc.18th Photovoltaic Science and Engineering Conf., Kolkata, India (2009) p.923-925.
- T.R. Reddy, N. Koteswara Reddy, and R.W. Miles,
Photovoltaic Properites of SnS Based Solar Cells,
Proc. 14th Photovoltaic Science and Engineering Conf., Bangkok, Thailand (2004) p.627-631.
- T.R. Reddy, Y.P.V. Subbaiah, T.B.S. Reddy, and R.W. Miles,
Investigations on CuInS2/ZnS0.5Se0.5/ZnO Thin Film Solar Cells,
Proc. 14th Photovoltaic Science and Engineering Conf., Bangkok, Thailand (2004) p.699-703
- T. Ramakrishna Reddy, T.B.S. Reddy, I. Forbes and R.W. Miles,
Synthesis of polycrystalline ZnS0.5Se0.5 layers by chemical spray deposition process,
Proc. 29th IEEE Photov. Specialists conf., New Orleans, USA (2002) p.620-624.
- Johnston, I.Forbes, KT.Ramakrishna Reddy and R.W.Miles,
Chemical bath depositionof zinc sulphide using materials with minimal environmental impact,
Proc. 17th European Photovoltaic Solar Energy Conference, Munich, Germany (2001) p.436-440.
- W. Miles, K.M. Hynes, K.T.R. Reddy, S. Armstrong, D. Johnston, P.Datta, I.Forbes and N.Pearsall,
Development of materials for photovoltaic applications (Review article),
Proc. 16th Frontier Science Research Conferences, California (2001) 117-129..
10. K. T. Ramakrishna Reddy, R.B.V. Chalapathy, T.K. Subramanyam, S. Uthanna and R.W. Miles,
Photovoltaic properties of CuGa0.2In0.8Se2/CdO heterojunction solar cells,
Proc. of 16th European Photovoltaics Solar Energy Conference, Glasgow, UK (2000) 740.
11. R. W. Miles, K.T. Ramakrishna Reddy and I. Forbes,
Synthesis of CuInS2 from magnetron sputtered Cu / In bilayers for use in thin film solar cells,
Proc. of 2nd World Conf. on Photov. Solar Energy Conversion, Wein, Austria (1998) p 496.
12. K. T. Ramakrishna Reddy and R.B.V. Chalapathy,
Spray pyrolysis of CuGaxIn1-xSe2 thin films – electrical and optical properties,
Institute of Physics Conference Proceedings, 152 (1998) 317.
13. S. Uthanna, B. Radhakrishna, K.T. Ramakrishna Reddy and B.S. Naidu,
Electrical and optical properties of reactive evaporated indium tin oxide films,
Institute of Physics Conference Proceddings, 152 (1998) 661.
14. N. Koteswara Reddy and K.T. Ramakrishna Reddy,
Tin sulphide thin films for solar cell application,
Proc. of 26th IEEE Photovoltaic Specialists Conf., Anaheim, CA (1997) p.515.
15. K. T. Ramakrishna Reddy and R.B.V. Chalapathy,
Preparation and properties of sprayed CuGa0.5In0.5Se2 thin films,
Proc. of 9th Inter. Photov. Sci. & Engg. Conf., Miyazaki, Japan (1996) p.385.
17. C. Sravani, K.T. Ramakrishna Reddy and P. Jayarama Reddy,
CdO thin films for solar energy conversion
Proc. of 23rd IEEE Photovoltaic Specialists Conf., Louisville, USA (1993) p.426.
18. C. Sravani, K.T.R. Reddy, P.S. Reddy and P. Jayarama Reddy,
A comparative study of conducting CdO films deposited by chemical spray and ARE,
Proc. of 6th Intern. Photov. Sci. & Engg. Conf., New Delh, India (1992).363.
19. K. T. Ramakrishna Reddy and P. Jayarama Reddy,
Polycrystalline ZnCdS/CuGaSe2 thin film solar cells,
Proc. of Intern. Conference on Physics of Semiconductor devices, J. SPIE,1529 (1992) 384
Proceedings (National)
- Purandhara Reddy and K.T. Ramakrishna Reddy,
Surface characterisation of sprayed SnS films,
Energy Security for India-Role of Renewables, Ed. Sethuraman, Allied Pub., New Delhi (2001) p.213.
- B.V. Chalapathy and K.T. Ramakrishna Reddy,
Preparation and characterisation of CuGaxIn1-xSe2 thin films,
“Physics of disordered materials”, Eds.: M.P.Saksena, N.S.Saxena and D.Bhandari, NICOM, New Delhi, India (1997) p.229.
- B.V. Chalapathy and K.T. Ramakrishna Reddy,
Physical properties of sprayed CuGa0.2In0.8Se2 films,
Proc. of National Conf. “Recent advances in solar energy technology”, New Delhi, India (1996) p.82.
- Md. Hussain, K.T.R. Reddy, P.S. Reddy, S. Uthanna, B.S. Naidu and P.J. Reddy,
Studies in CdTe based polycrystalline thin film solar cells,
“Towards Clean Energy”, Eds.: Ramaseshan, Tata McGraw-Hill Pub. Co., India (1996) p.192.
- T. Ramakrishna Reddy and P. Jayarama Reddy,
Characterisation of CuGaSe2 films for photovoltaic application
“Renewable energy for rural development”, Eds. VVN Kisore and NK Bansal, Tata Mc-Graw Hill Pub.Com.
New Delhi (1989) p.163.
Patents:
1. D. Johnston, I. Forbes, R.W. Miles and K.T. Ramakrishna Reddy, Rapid anodic process for producing chalcopyrite compounds, UK Patent No: GB 2370282 (2003). (First Foreign Patent for SVU Faculty)
2. K. T. Ramakrishna Reddy, P. Babu and R.W. Miles, Synthesis of zinc indium selenide, ZnIn2Se4 (ZIS) and zinc indium hydroxyselenide, ZnIn2(OH,Se)4 (ZIHS) layers using a chemical bath deposition process, Provisional UK Patent No: GB 1218638.3 (2012).
Citations (Cumulative): 7192: h-index: Google Scholar: 45; Research Gate – 42; RG Score: 39.25
Books
Books / Book Chapters:
- K.T. Ramakrishna Reddy, P. Prathap and R.W. Miles, “Photovoltaics: Developments, Applications and Impact”, Eds. H. Tanaka & K. Yamashita, Nova Science Publishers, Inc., New York (2010) p. 1-27.
- R. W. Miles, G. Zoppi, K. T. Ramakrishna Reddy and I. Forbes, “Organic Nanostructured Thin Film Devices and Coatings for Clean Energy”, Ed. S. Zhang, CRC Press, London (2010) p.1-56.
- N. Revathi and K. T. Ramakrishna Reddy, Investigations on In2S3 Layers Grown by Close Spaced Evaporation, LAP Lambert Academic Publishing, Germany (2011).
- K. T. Ramakrishna Reddy, Solid State Physics in: A text book of Modern Physics, Telugu Academy, Govt. of Andhra Pradesh, Hyderabad (2012).
- G. Sreedevi, K. T. Ramakrishna Reddy, Polycrystalline Sn-S Based Layers for Solar Cell Application, LAP Lambert Academic Publishing, Germany (2016).
Research interest
Semiconductor Materials, Thin film solar cells
Research projects
- Investigations on polycrystalline CuGaInSe2 thin films – (1992-1994) – Dept. of Science and Technology, New Delhi – 1,72,000 (Principal Investigator)
- Research and development on superconductivity – (1993–1998) – University Grants Commission, New Delhi – Rs. 16,00,000 (Co-Investigator)
- Development of 10cmx10cm sub-modules based CuInSe2 cells – (1994-1999) – Ministry of Non-conventional Energy Sources, New Delhi – Rs. 26,60,000 (Co-Investigator)
- Physical investigations on sprayed SnS thin films – (1999-2001) – UGC Minor Research Project, Delhi – 2,30,000. (Principal Investigator)
- Investigations on ZnO and ZnSSe window layers for application in CuInS2 solar cells – (2000-2002) – EPSRC, UK – Rs. 15,20,000 (Indian Investigator)
- Development of In2O3:Mo layers for photovoltaic application – (2006-2009) – DAE Consortium for Scientific Research, Indore – 1,35,000. (Principal Investigator)
- Investigations on polycrystalline SnS thin films for solar photovoltaic application – (2009-2012) – University Grants Commission, New Delhi – 9,45,000 (Principal Investigator)
- SnS solar photovoltaic cells – (2011-2013) – Research Executive Agency, European Commission, Brussels – Rs. 2,24,00,000. (Indian Investigator)
- Development of efficient, low cost photovoltaic solar cells based on the use of SnS absorber layers – (2014-2016) – India-UK Joint Project – Rs. 18,42,000 (Indian Collaborator)
- Thin films of In2S3 material for thin film solar cell application – (2015-2017) – India-Belarus Joint Project – Rs. 18,57,000. (Indian Principal Collaborator)
- Investigations on novel and new materials for device development – (2015-2020) – DST – FIST Programme Phase III – Rs. 1,76,00,000. (Coordinator, 2014-2016)
- Investigations on advanced materials for device applications – (2015-2020) – UGC – CAS-II – Programme – Rs. 2,81,00,000 (Coordinator)
- Advanced metal oxide materials for high band gap solar cells – (2015-2018) – India-Slovenia Joint Project – Rs.19,49,000. (Indian Principal Collaborator)
- Development of Earth Abundant and Environmentally Benign Solar Cell – (2016-2019) – University Grants Commission, New Delhi – Rs. 10,00,000 (Principal Investigator)
- Flexible semi-transparent solar cells for building integrated photovoltaics via CZTS powders – (2018-2021) – India-Russia Joint Project – Rs. 70,30,400 (Indian Principal Collaborator)
- In2S3/Sn(S,Se) thin film heterojunctions for photovoltaic applications – (2019-2021) – India–Belarus Joint Project – Rs. 12,60,600. (Indian Principal Collaborator)
Conference
Awards Received :
- APCOST Scientist Award (Physical Sciences), Govt. of Andhra Pradesh
- UGC Mid-Career Award, University Grants Commission, New Delhi
- Best Teacher Award (Subject Category), Govt. of Andhra Pradesh
- Visiting Professor Title, Northumbria University, Newcastle, UK
- Fellow, AP Academy of Sciences, Hyderabad
- Best Teacher Award, SVU College of Sciences, Sri Venkateswara University, Tirupati
Fellowships Received :
International:
- Visiting Professorship, British Overseas Development Agency, UK
- Marie Curie Fellowship, European Commission, Brussels
- JSPS Research Fellowship, JSPS, Tokyo,
- Commonwealth Research Fellowship, Commonwealth Commission, UK
- Visiting Fellowship, INSA-Royal Society, UK
- Visiting Fellowship, Engineering & Physical Sciences Research Council, UK
- Visiting Fellowship, Ministry of Science, Govt. of Israel
- BOYSCAST Fellowship, Dept. of Science and Technology, New Delhi
- Visiting Foreign Fellowship, Chinese Academy of Sciences, China
- DAAD Fellowship, DAAD Foundation, Germany
National:
- Visiting Associateship, University Grants Commission, New Delhi
- SERC Visiting Fellowship, Dept. of Science and Technology, New Delhi
- Research Associateship, Council of Scientific & Industrial Research, New Delhi
- Senior Research Fellowship, Council of Scientific & Industrial Research, New Delhi
- Junior Research Fellowship, Ministry of Non-conventional Energy Sources, New Delhi
- Visiting Student Research Fellow, Tata Institute of Fundamental Research, Bombay
- National Merit Scholarship, Govt. of Andhra Pradesh
Research Supervision:
PhD Degree: 26; MPhil Degree: 8
MoUs:
- University of Northumbria, Newcastle upon Tyne, UK
- University of Ljubljana, Ljubljana, Slovenia
- Tokyo University of Sciences, Tokyo, Japan
- Scientific Practical Materials Research Centre, National Academy of Sciences, Minsk, Belarus.
- Institute of Problems in Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia
- Belarusian State University, Minsk, Belarus
- New and Renewable Energy Development Corporation of Andhra Pradesh.
Research Collaborations:
National
- Department of Physics, Indian Institute of Sciences, Bangalore.
- Inter-University Consortium for Scientific Research, Indore.
- Department of Physics, ML Sukhadia University, Udaipur
- School of Energy Studies, Indian Institute of Technology, Delhi.
- Department of Physics, Indian Institute of Technology, Guwahati.
International
- Department of Electrical Engineering, University of Stuttgart, Stuttgart, Germany
- Jerusalem College of Technology, Jerusalem & Weizmann Institute of Sciences, Rehovot, Israel.
- School of Engineering, Northumbria University, Newcastle upon Tyne, UK
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Republic of Korea.
- Department of Electrical Engineering, Tokyo University of Sciences, Tokyo, Japan.
- Scientific Practical Materials Research Centre, National Academy of Sciences, Minsk, Belarus.
- Institute of Problems in Chemical Physics, Russian Academy of Science, Chernogolovka, Russia
- Microelectronics and General Physics Department, Yaroslavl State University, Yaroslavl, Russia
- Faculty of Physics, Belarusian State University, Minsk, Belarus.
- Department of Electronics and Computer Sciences, Koszalin University of Technology, Poland.
- Institute of Photonics and Nanotechnology, Vilnius University, Vilnius, Lithuania.
Visits Abroad :
Visited Italy (2 times), Germany (3), Israel (1), UK (12), France (4), Thailand (4), China (2), Greece (1), Japan (3), Sudan (1), USA (1), Singapore (3), Macau (1), Belgium (4), Estonia (1), Mexico (1), Malaysia (1), Cyprus (1), Crete (1), Taiwan (1), Korea (1), Slovenia (2), Poland (1), Belarus (3), Russia (2) on research fellowships / on invitations / for attending Conferences / other assignments.
Membership in Professional bodies
Fellow – Andhra Pradesh Academy of Sciences;
Fellow – Telangana Academy of Sciences;
Life Member – Semiconductor Society of India,
Solar Energy Society of India,
Instruments Society of India, Indian
Indian Vacuum Society,
Society for Solid State Sciences.
Indian Science Congress Association
Member – Association of British Scholars (India),
Marie Curie Alumni Association;
Other Information:
# Taught ’Renewable Energy’ courses at Northumbria University, UK and EU-China Institute of Clean and Renewable Energy (ICARE), Huazhong University of Science & Technology Wuhan, China during 2011-2013.
# Instrumental in establishing 5 MoUs with foreign Universities in UK, Slovenia, Belarus, Japan and Russia for exchange of faculty and research students and 1 MoU with the New & Renewable Development Corporation of AP for solar power generation.
# Invited for nomination to the ‘Eni Award‘ (an international award in Energy Research) in association with Prof. R.W. Miles (UK) by the Eni Society, Italy.
# Two of the research articles were identified as the “Key Scientific Inventions” published by the ‘Renewable Energy Global Innovations’, Canada, a Centre that brings in top innovations around the world in Renewable Energy Research and Technology.
# Member, Committee constituted by APSCHE for introducing 5 Year Integrated Programme to work out the guidelines to start the programme in AP State from the academic year 2021-2022 onwards.
# Supervised student projects for MSc/MTech courses: SV University – 29, Northumbria University, UK – 4, ICARE, China – 4.
# Subject Expert, Formulation of syllabi for Life Skill, Skill Development and Skill Enhancement courses in BSc degree constituted by APSCHE in the NEW 2020.
# Member, Advisory Committee, UGC DRS (1993-95), DSA (1996-2001), CAS-I (2009-2014) and CAS-II (2015-2020) Programmes, S.V. University, Tirupati.
# Expert Member, Advisory Committee, UGC CAS-II Programme, Andhra University, Visakhapatnam (2016-2021)
# Member, Selection Committee of Faculty Members, Jammu & Kashmir State Public Service Commission and Mijoram State Public Service Commission.
# Member, Board of Studies, Mangalore University; Acharya Nagarjuna University; Andhra University; Adikavi Nannaya University; S. K. University; Karnataka University, Yogi Vemana University; SV University; Central Trial University, Krishna University
# Member, Selection Committee for Academic Consultants, Acharya Nagarjuna University, Yogi Vemana University, S.V. University, S. K. University, SV Vedic University.
# Honorary Consultant to Tirumala Tirupati Devasthanam (TTD) on gold weighment at Parakamani, Tirumala and Treasury, Tirupati (2014 – 2015).
# Honorary Consultant to Anantapur District National Educational Trust for testing of 1.2 MW Solar PV Power Systems (2015 – 2016)
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