Abstract
The effect of ambient conditions on light soaking (LS) in porous silicon (PS) is studied. In vacuum, LS on porous silicon increases dark current (DC) while in presence of water vapor it decreases DC. Interestingly, LS gives a higher DC in vacuum as well as in presence of water vapor for boron doped hydrogenated amorphous silicon a-Si:H(B) samples. A thin layer of polystyrene polymer almost eliminates the light induced degradation of porous silicon (PS) layers but can do so only to a smaller extent in a-Si:H(B). This shows that the effect of LS in PS is different than the effect of LS in a-Si:H(B) and that the surface plays a more important role in PS than in a-Si:H.
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References
L. T. Canham, Appl. Phys. Lett. 57, 1046–1048 (1990).
O. Bisi, S. Ossicini and L. Pavesi, Surf. Sci. Reports. 38, 1 (2000).
N. P. Mandal and S. C. Agarwal, J. Mater. Sci.: Mater. Elctr. 14, 797–798 (2003).
N. P. Mandal and S. C. Agarwal, Mater. Res. Soc. Symp. Proc. Vol 762, A17.18, Editors: J. R. Abelson, G. Ganguly, H. Matsumura, J. Robertson, E. A. Schiff, Spring 2003, San Francisco.
S. T. Lakshmikumar and P. K. Singh, J. Appl. Phys . 6, 3413 (2002).
See for review, H. Fritzsche, Annual Review of Material Science 31, 47 (2001).
C. Anandan, C. Mukherjee, T. Seth, P. N. Dixit and R. Bhattacharya, Appl. Phys. Lett. 68, 835 (1996).
W. H. Lee, H. Lee and C. Lee, J. Non-Crys. Solids, 164–166, 965 (1993).
T. Frello, E. Veje and O. Leistiko, J. Appl. Phys., 79, 1027 (1996).
N P Mandal, Abhishek Kumar and S C Agarwal (accepted in J. Non-Cryst. Solids).
B. Aker and H. Fritzsche, J. Appl. Phys. 54, 6626 (1983).
N P Mandal, Ashutosh Sharma and S C Agarwal (accepted in J. Appl. Phys.)
N P Mandal, Ashutosh Sharma and S C Agarwal, Solid State Commun. 129, 183–186 (2004).
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Agarwal, S.C., Kumar, A. & Mandal, N.P. Role of Surface on the Persistent Photoconductivity in Porous Silicon and Boron Doped a-Si:H. MRS Online Proceedings Library 910, 1201 (2005). https://doi.org/10.1557/PROC-0910-A12-01
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DOI: https://doi.org/10.1557/PROC-0910-A12-01