Surface effects on photoluminescence of single ZnO nanowires

被引：199

作者：

Liao, Zhi-Min ^{[1
,2
]}

Zhang, Hong-Zhou ^{[3
]}

Zhou, Yang-Bo ^{[1
,2
]}

Xu, Jun ^{[1
,2
]}

Zhang, Jing-Min ^{[1
,2
]}

Yu, Da-Peng ^{[1
,2
]}

机构：

[1] Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing 100871, Peoples R China

[2] Peking Univ, Elect Microscopy Lab, Sch Phys, Beijing 100871, Peoples R China

[3] Australian Natl Univ, Dept Elect Mat Engn, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia

来源：

PHYSICS LETTERS A | 2008年 / 372卷 / 24期

基金：

中国国家自然科学基金;

关键词：

ZnO nanowires; photoluminescence; surface effects; exciton emissions; blue luminescence; oxygen vacancies;

D O I：

10.1016/j.physleta.2008.04.013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of surface effects on the temperature dependent photoluminescence (PL) spectra from individual ZnO nanowires has been studied. It is found that the surface effects of the nanowire are very important in both ultraviolet (UV) and visible emission. We propose a new luminescence mechanism based on the recombination related to oxygen vacancies to explain the temperature dependent visible emission, which is significantly influenced by the carrier depletion and band bending caused by surface effects. In addition, the observed attenuation of UV emission with increasing temperature is ascribed to the decreasing depletion region and the increasing surface states related nonradiative recombination. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：4505 / 4509

页数：5

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