A laplace transform technique for direct determination of density of electronic states in disordered semiconductors from transient photocurrent data

M. J. Gueorguieva, C. Main, S. Reynolds

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Abstract

A new technique for direct determination of the density of electronic states (DOS) in disordered semiconductors is described. It involves Laplace transformation of transient photocurrent data I(t) followed by the numerical solution of the system of linear algebraic equations obtained from the Fredholm integral of the first kind, for a DOS represented by a series of discrete levels. No approximations are used in the solution, and no prior assumptions as to the form of the DOS are made. The fidelity of this method is assessed and compared with existing techniques by application to computer-simulated I(t) data generated from single-level and continuous DOS profiles, and to experimental data.

Original languageEnglish
JournalMaterials Research Society Symposium - Proceedings
Volume609
DOIs
Publication statusPublished - Jan 2000
EventAmorphous and Heterogeneus Silicon Thin Films-2000 - San Francisco, CA, United States
Duration: 24 Apr 200028 Apr 2000

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