Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/79671
Type: Artigo de periódico
Title: STRUCTURAL AND OPTOELECTRONIC PROPERTIES OF GE-RICH HYDROGENATED AMORPHOUS SILICON-GERMANIUM ALLOYS
Author: GRAEFF, CFO
CHAMBOULEYRON, I
Abstract: In this work the structural and opto-electronic properties of rf sputtered germanium-rich hydrogenated amorphous silicon germanium alloys (a-SixGe1-x:H) are presented. It has been found that for x less-than-or-equal-to 0.1, the Si incorporation does not appreciably affect, either the density of localized states in the pseudo-gap, or the structural properties of the films. However the Tauc's optical gap shifts from 1.04 eV (x=0.0) to almost-equal-to 1.13 eV (x=0.1). A concomitant two orders of magnitude decrease of the dark conductivity is measured, whereas the photoconductivity remains essentially unchanged. In other words, the incorporation of small amounts of Si in the hydrogenated amorphous germanium (a-Ge:H) network produces a noticeable increase of the photosensitivity of the samples. These results are discussed in the framework of present models of amorphous semiconductor alloys.
Editor: Amer Inst Physics
Rights: aberto
Identifier DOI: 10.1063/1.357599
Date Issue: 1994
Appears in Collections:Unicamp - Artigos e Outros Documentos

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