Space-charge-limited current in nanowires depleted by oxygen adsorption

被引：102

作者：

Gu, Y.

Lauhon, L. J. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 14期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2358316

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effects of oxygen adsorption on the conductivity and carrier transport mechanisms in CdS nanowires were established through variable temperature electrical transport and photoconductivity measurements. n-type CdS nanowires were found to be significantly less conductive in the ambient air than in the vacuum due to electron depletion induced by adsorbed oxygen. The current-voltage characteristics of depleted nanowires exhibited a power law behavior consistent with space-charge-limited conduction in the presence of traps. Analysis of the voltage and temperature dependencies of the space-charge-limited current showed that the nanowire surface traps are exponentially distributed in energy with a characteristic depth of similar to 0.28 +/- 0.04 eV. (c) 2006 American Institute of Physics.

引用

页数：3

共 24 条

[1] ANALYTICAL AND EXPERIMENTAL INVESTIGATION OF EFFECTS OF OXYGEN CHEMISORPTION ON ELECTRICAL CONDUCTIVITY OF CDS [J].