Abstract
Spectral and kinetic dependencies of photovoltaic effects in porous silicon-crystal substrate structures have been studied. Both as-prepared and aged in air samples were used. It is shown for the first time that besides the photovoltage component connected with a depleted region in the silicon substrate at the interface with the porous layer there is a photovoltage due to porous silicon itself. It is established that the electron states with the relaxation time about several minutes are located on the pores surface. The properties of these states changed with the thermal annealing of structures. The “superslow” hole traps with a relaxation time of about several hours were registered in the aged samples. These traps are located in the oxide on the silicon skeleton surface of the porous silicon. An energy diagram based on the data is suggested that explains the appearance of photovoltaic effects in the investigated structures.
Similar content being viewed by others
References
L.T. Canham: Appl. Phys. Lett.57, 1046 (1990)
P.C. Searson, J.M. Macaulay, S.M. Prokes: J. Electrochem. Soc.139, 3373 (1992)
G. Bomchil, A. Halimaoui, I. Sagnes, P.A. Badoz, I. Berbezier, P. Perret, B. Lambert, G. Vincent, L. Garchery, J.L. Regolini: Surf. Sci.65/66, 394 (1993)
K.H. Jung, S. Shih, D.L. Kwong: J. Electrochem. Soc.140, 3016 (1993)
F. Yan, X.-M. Bao, T. Gao: Solid State Commun.91, 341 (1994)
Z. Han, J. Shi, H. Tao, L. Cong, S. Fu, X. Zhang: Phys. Lett. A186, 265 (1994)
D.W. Boeringer, R. Tsu: Appl. Phys. Lett.65, 2332 (1994)
R. Sedlačik, F. Karel, J. Oswald, A. Fejfar, I. Pelant, J. Kočka: Thin Solid Films255, 269 (1995)
W.H. Lee, H. Lee, C. Lee: J. Non-Cryst. Solids164-166, 965 (1993)
Th. Dittrich, P.K. Kashkarov, E.A. Konstantinova, V. Yu. Timoshenko: Thin Solid Films255, 74 (1995)
V.F. Kiselev, O.V. Krylov:Electronic Phenomena in Adsorption and Catalysis on Semiconductors and Dielectrics, Springer Ser. Surf. Sci., Vol. 7 (Springer, Heidelberg, Berlin 1987) pp. 1–279
A. Grosman, M. Chamarro, V. Morazzani, C. Ortega, S. Rigo, J. Siejka, H.J. von Bardeleben: J. Lumin.57, 13 (1993)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kashkarov, P.K., Konstantinova, E.A., Matveeva, A.B. et al. Photovoltage and photo-induced charge trapping in porous silicon. Appl. Phys. A 62, 547–551 (1996). https://doi.org/10.1007/BF01571691
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01571691