CDU Researcher Profile

• Research interests
• Publications
• Current projects
• Recent completions supervised

Research Interests

My general research interests lie in the area of condensed matter physics. Specifically:

• Excitonic Processes in Condensed Matter
• Photo-excitation Induced Processes in Amorphous Semiconductors
• Designing Amorphous Silicon Solar Cells for Optimal Photovoltaic Performance

Recent Publications

Books

1. Singh, J (editor), Optical Properties of Condensed Matter and Applications (John-Wiley & Sons, (2005), 500 pages (in press).

2. Singh, J. and Shimakawa, K. (2003). Advances in Amorphous Semiconductors. Gordon and Breach /Taylor & Francis, London.
3. Singh, J. (1994). Excitation energy transfer processes in condensed matter: Theory and applications. Plenum Press, New York-London.
   

Book proceedings

1. Singh, J. (2003). Excitonic Processes in Amorphous Semiconductors. In Dap, M.P. and Green, F. (Eds.), Condensed Matter Theories (pp. 339-351). New York USA: Nova Science Publishers, Inc.
2. Singh, J., Oh, I.-K. and Kasap, S.O. (2003). Optical absorption, photoexcitation and excitons in solids: fundamental concepts. In Peled, A. (Eds.), Photo-Excited Processes, Diagnostics and Applications- Fundamentals and Advanced Topics (pp. 25-55). Boston, USA: Kluwer Academic Publishers.
3. Singh, J. (ed). (2002). Proceedings of the 5th International Conference on Excitonic Processes in Condensed Matter. EXCON'02, 22-26 July2002, Darwin, Australia. Published as a special volume of the Journal of Nonlinear Optics, 29,   pp 4-12.

Book chapters

1. Singh, J. Recent Advances in Photoluminescence of Amorphous Condensed Matter, in Trends in Materials Science Research, Editor B.M. Caruta (Nova Science Publishers, N. Y., 2005), ISBN 1-59454-367-4.

Journals and papers

1. J. Singh and I.-K. Oh, Radiative lifetime of excitonic photoluminescence in amorphous semiconductors, J. Applied Physics 97, 063516-063529 (2005).
2. Singh, J., Radiative recombination of excitons in amorphous semiconductors, Journal of Luminescence 112, 40-44 (2005).
3. Singh, J., Radiative lifetime and spontaneous emission in amorphous semiconductor, J. Optoelectronics and Advanced Materials 7, 129-136 (2005).
4. Singh, J.and I.-K. Oh, A quantum Approach to Photodarkening in Chalcogenides, Journal of Non-Crystalline Solids 351, 1582-1585 (2005).
5. I.-K. Oh and J. Singh, E. Kim and C. Chen, Transferable tight-binding model for Germanium, Journal of Non-Crystalline Solids 351, 1192-1195 (2005).
6. Oh, I.-K. and Singh J. (2004) Acoustic-phonon-assisted localization of free excitons due to interface roughness in quantum wells. Journal of Applied Physics, 95, pp4883-4889
7. Singh, J. (2003). Electronic processes in amorphous semiconductors. Journal of Material Science, 14, pp 171-186.
8. Oh, I. K., Singh, J. and Vengurlekar, A. S. (2002). Longitudinal optical phonon assisted relaxation of excitons due to inter-subband transitions in quantum wells. Journal of Applied Physics, 91, pp 5796-5801.
9. Singh, J., Aoki, T. and Shimakawa, K. (2002). Excitonic contribution to photoluminescence in amorphous semiconductors. Phil. Mag., B82, pp 855-871.
10. Singh, J. (2002). Effective mass of charge carriers in amorphous semiconductors and its applications. Journal of Non-Crystalline Solids, 299-302, 444-448.
11. Oh, I. K. and Singh, J. (2002). Influence of acoustic phonons on dephasing of free excitons in quantum wells. Superlattices and Microstructures, 30, pp 287-295.
12. Singh, J. (2002). Study of the absorption properties of amorphous solids. Nonlinear Optics, 29, pp 119-133.
13. Singh, J. (2002). Excitonic Processes in Amorphous Semiconductors. Proceedings of the 25th International Condensed Matter Theory Workshop, 3-8 December 2001, Canberra, Australia. Nova Publishers, New York, USA.
14. Singh, J. and Oh, I. K. (2002). Generation of acoustic phonons from quasi-2-dimensional hole gas in quantum wells. Australian Institute of Physics 15th Biennial Congress, 8-11 July, 2002, Sydney, Australia. Australian Institute of Physics, Sydney, Australia. pp 349-351.
15. Oh, I. K. and Singh, J. (2002). Emission of phonons from quasi-2D excitons. 5th International Conference on Excitonic Processes in Condensed Matter, EXCON'02, 22-26 July, 2002, Darwin, Australia. Nonlinear Optics, 29, pp 475- 480.
16. Singh, J. and Oh, I. K. (2001). Acoustic phonon generation from quasi-2D hole gas in quantum wells. Journal of Physics, Condensed Matter, 13, pp 10851-10863.
17. Oh, I. K. and Singh, J. (2001). Formation of excitons from free electron-hole pairs due to acoustic phonon interactions in quantum wells. Superlattices and Microstructures, 30, pp 221-229.
18. Singh, J. (2001). Excitonic photoluminescence in amorphous semiconductors. In: Marshall, J. J., Petrov, A. G., Vavrek, A., Nesheva, D, Dimova-Malinovska, D.,Maud, J. M. (eds). 11th International School of Condensed Matter Physics. Bookcraft, Bath U.K. pp 50-57.
19. Thilagam, A. and Singh, J. (2001). Assessment of the influence of charged dangling bonds on the short circuit current in amorphous silicon solar cells. Journal of Non-Crystalline Solids, 288, pp 66-72.
20. Oh, I. K. and Singh, J. (2001). Dependence of exciton formation on its Centre-of-Mass Momentum in Quantum Wells. In: Cho, K. and Matsui, A. (eds). Yamada Conf. LIII: 2000 Int. Conf. on Excitonic Processes in Condensed Matter. World Scientific Publishing Co., Singapore. pp 92-95.
21. Thilagam, A. and Singh, J. (2001). Assessment of the influence of charged dangling bonds on the short circuit current in amorphous silicon solar cells. Journal of Non-Crystalline Solids, 288, pp 66-72.
22. Oh, I. K. and Singh, J. (2001). Acoustic phonon generation from quasi-2D hole gas in quantum wells. Journal of Physics, Condensed Matter 13, pp 10851-10863.
23. Oh, I. K. and Singh, J. (2000). Dependence of exciton formation formation on its centre of mass momentum in quantum wells. International Conference on Excitonic Processes in Condensed Matter, EXCON2000, 22-26 August 2000, Osaka, Japan. Published in International Journal of Modern Physics, B15, (2001).
24. Singh, J. (2000). Excitonic Photoluminescence in Amorphous Solids. (Invited Paper), presented at the International Summer School on Condensed Matter Physics. In: Marshall, J. M. et al. (2000). Proceedings of the International Summer School on Condensed Matter Physics. World Scientific. pp 50-57.
25. Kamiya, H., Davis, E., Shimakawa, K., Singh, J. and Ganjo. (2000). Percolative Growth of Photodarkening in Amorphous As2S3 Films. Physical Review B, 62, pp 14601-14604.
26. Oh, I. K. and Singh, J. (2000). Excitonic Relaxation Involving Exciton-Acoustic Phono Interactions in Quantum Wells. Journal of Luminescence, 87-89, pp 219-221.
27. Thilagam, A., Vengurlekar, A., Singh, J. and Oh, I. K. (2000). Exciton Formation Assisted By Lo Phonons in Quantum Wells. Physical Review B, 62, pp 2045-2050.
28. Oh, I. K. and Singh, J. (2000). Excitonic Relaxation Through Phonon Interactions in Quantum Wells. Journal of Luminescence, 85, pp 233-246.
29. Singh, J., Shimakawa, K., Kurihara, M. and Aoki, T. (2000). Photoluminescence in High Quality a-Ge:H. Journal of Non-Crystalline Solids, 266-269, pp 721-725.
30. Shimakawa, K., Garwood, A., Singh, J. and Meherun, N. (2000). Fundamental Optical Absorption on Fractals A Case Example For Amorphous Chalcogenides. Journal of Optoelectronics and Advanced Materials, 2, pp 133-138.
31. Oh, I. K. and Singh, J. (2000). Excitonic relaxation through phonon interactions in quantum wells. Journal of Luminescence, 85, pp 233-246.
32. Oh, I. K. and Singh, J. (2000). Excitonic relaxation involving exciton-acoustic phonon interactions in quantum wells. Journal of Luminescence, 87-89, pp 219-221.
33. Singh, J. and Shimakawa, K. (2000). Defect formation due to pairing of holes on covalent bonds in amorphous semiconductors. Asian Journal of Physics, 9, pp 543-550.
34. Ishii, S., Kurihara, M., Aoki, T., Shimakawa, K. and Singh, J. (2000). Photluminescence of high-quality a-Ge:H. Journal of Non-Crystalline Solids, 266-269, pp 721-724.
35. Oh, I. K. and Singh, J. (2000). Exciton formation assisted by LO phonons in quantum wells. Physical Review B, 62, pp 2045-2050.
36. Ganjoo, A., Shimakawa, K., Kamiya, H., Davis, E. A. and Singh, J. (2000). Percolative growth of photodarkening in amorphous As2S3 films. Physical Review B, 62, pp 14601-14604.
37. Meheren, N., Shimakawa, K., Ganjoo, A. and Singh, J. (2000). Fundamental Optical Absorption on Fractals: A case example of Amorphous Chalcogenides. Journal of Optoelectronics and Advanced Materials, 2, pp 133-138.
38. Singh, J., Stulik, P. and Yang, R. (1999). The problem of degradation in amosphous silicon thin films and possible solutions. In: 10th International School on Condensed Matter Physics. World Scientific, Singapore. pp 29-36.
39. Singh, J. and Shimakawa K. (1999). Bond breaking in hydrogenated amorphous silicon due to pairing of holes on weak bonds. Physical Review Letters.
40. Oh, I. K. and Singh, J. (1999). Geometric approach to determine the binding energy of quasi-two- dimensional biexcitons. Physical Review B, 60, pp 2528-2535.
41. Singh, J., Stulik, P. and Yang R. (1998). The problem of degradation in a-Si:H thin films and possible solutions. Invited paper presented at the International School on Condensed Matter Physics, 31 Aug. - 4 Sept, 1998, Varna, Bulgaria. In: Marshall, J. M., Kirov, N., Vavrek, A. and Maud, J. M. (eds). Proceeding of Thin Film Materials and Devices - Developments in Science and Technology. World Scientific, Singapore. pp 29-36.
42. Thilagam, A. and Singh, J. (1998). Formation of excitons via LO phonon emission in quantum wells. Proceedings of EXCON98, 1 - 5 November 1998, Boston, USA. pp 180- 185.
43. Oh, I. K. and Singh, J. (1998). A geometric approach to calculate the binding energy and structural configuration of 2D biexcitons. Proceedings of EXCON98, 1 - 5 November 1998, Boston, USA. pp 483-488.

Current Projects

Current projects being undertaken by Jai include:

• Excitonic Processes in Condensed Matter
• Singh Jai Photo-excitation Processes in Amorphous Semiconductors Australian Research Council $ 24255 01-Jan-01 to 31-Dec-03.
• Designing Amorphous Silicon Solar Cells for Optimal Photovoltaic Performance.
  

Recent Completions Supervised

PhD

• Pavel Stulik: (January, 1996-1998). Project: Study of the optical properties of thin film amorphous silicon solar cells. Thesis submitted in October, 1998/degree awarded in 1999.