CONDUCTION MECHANISMS IN IRRADIATED CdSe THIN FILMS

Abstract

Two conduction regimes defined by different roles of the intercrystalline barriers and crystallites respectively are analyzed for semiconducting polycrystalline vacuum evaporated CdSe thin layers, in strong electric field. We give an interpretation of the effect of fast electrons irradiation on these specific conduction mechanisms. The changing of some microscopic parameters (barrier lengths and potential barriers height) is calculated by fitting the experimental and theoretical I – E characteristics, both for irradiated and unirradiated films. In addition, an extended version of the Antisymmetrized Molecular Dynamics (AMD) method is implemented in order to study clustering aspects for both regimes and to compute the related interaction potentials.