[en] Electrical conduction in semiconductor heterojunctions containing defect states in the interface region is studied. As the classical drift-diffusion mechanism cannot in any case explain electrical conduction in semiconductor heterojunctions, tunnelling involving interface states is often considered as a possible conduction path. A theoretical treatment is made where defect states in the interface region with a continuous energy distribution are included. Electrical conduction through this defect band then allows the transit of electrons from the conduction band of one semiconductor to the valence band of the second component. The analysis is initiated by electrical measurements on n-CdS/p-CdTe heterojunctions obtained by chemical vapour deposition of CdS on (111) oriented CdTe single crystals, for which current--voltage and capacitance--frequency results are shown. The theoretical analysis is based on the numerical resolution of Poisson's equation and the continuity equations of electrons, holes and defect states, where a current component corresponding to the defect band conduction is explicitly included. Comparison with the experimental curves shows that this formalism yields an efficient tool to model the conduction process through the interface region. It also allows us to determine critical values of the physical parameters when a particular step in the conduction mechanism becomes dominant.
Disciplines :
Physics
Author, co-author :
El Yacoubi, Mohamed; Université de Liège - ULiège > Département de physique
Evrard, Roger ; Université de Liège - ULiège > Département de physique
Nguyen, Ngoc Duy ; Université de Liège - ULiège > Département de physique > Physique des solides, interfaces et nanostructures
Schmeits, Marcel; Université de Liège - ULiège > Département de physique
Language :
English
Title :
Electrical conduction by interface states in semiconductor heterojunctions
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Bibliography
Morgan V and Williams R H (eds) 1991 Physics and Technology of Heterojunction Devices (IEE Materials and Devices Series 8) (London: Peregrinus)
Partain L D1995 Solar Cells and their Applications (New York: Wiley)
Ou S S, Stafsudd O M and Basol B M 1984 Solid State Electron. 27 21
Anthony T C, Fahrenbuch A L, Peters M G and Bube R H 1985 J. Appl. Phys. 57 400
Chu T L, Chu S S and Ang S T 1988 J. Appl. Phys. 64 1233
Ercelebi C, Brinkman A W, Furlong T S and Woods J 1990 J. Cryst. Growth 101 162
Ringel S A, Smith A W, MacDougal and Rohatgi A 1991 J. Appl. Phys. 70 881
Morris R G and Das S K 1992 Int. J. Solar Energy 12 95
Brinkman A W, Al Allak H M, Arwan G R, Brown P D, Durose K, Ercelebi C, Simmons M V and Woods J 1992 Int. J. Solar Energy 12 233
Das S K 1993 Solar Energy Mater. Solar Cells 29 227
Tomita Y, Kawai T and Hatanaka Y 1993 Japan. J. Appl. Phys. 32 1923
Bayhan H and Ercelebi C 1997 Semicond. Sci. Technol. 12 600
Sakhaf M and Schmeits M 1996 J. Appl. Phys. 80 6893
Schmeits M 1997 Solid State Commun. 12 1217
Sze S M 1981 Physics of Semiconductor Devices (New York: Wiley)
Chen J F, Chen N C, Wang P Y and Tsai M H 1996 J. Appl. Phys. 81 1255
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