Where does photocurrent flow in polycrystalline CdS?

被引：27

作者：

Azulay, D

Millo, O ^{[1
]}

Silbert, S

Balberg, I

Naghavi, N

机构：

[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[2] CNRS, UMR 7575, LECA, ENSCP, F-75231 Paris, France

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 21期

基金：

以色列科学基金会;

关键词：

D O I：

10.1063/1.1923157

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the local photoconductance in polycrystalline CdS films using conductance atomic force microscopy under illumination, and found that photoconductivity along the grain boundaries is excited at photon energies significantly smaller than the CdS band gap, E-g, whereas phototransport through the grains is detected only above E-g. In addition, we observed a rather strong persistent photoconductivity effect at both conduction channels. The implications of these findings regarding the band tails in CdS films and photovoltaic applications are discussed. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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[1] Current routes in hydrogenated microcrystalline silicon [J].