Photogenerated charges and surface potential variations investigated on single Si nanorods by electrostatic force microscopy combined with laser irradiation

被引：13

作者：

Wu, Shan ^{[1
]}

Wu, Zilong ^{[1
]}

Lin, Dongdong ^{[1
]}

Zhong, Zhenyang ^{[1
]}

Jiang, Zuimin ^{[1
]}

Yang, Xinju ^{[1
]}

机构：

[1] Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

来源：

NANOSCALE RESEARCH LETTERS | 2014年 / 9卷

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Si nanorods; EFM; Photogenerated charging; Surface potential; SILICON NANOWIRE ARRAYS; PHOTOIONIZATION; NANOCRYSTALS; INJECTION;

D O I：

10.1186/1556-276X-9-245

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Photogenerated charging properties of single Si nanorods (Si NRs) are investigated by electrostatic force microscopy (EFM) combined with laser irradiation. Under laser irradiation, Si NRs are positively charged. The amount of the charges trapped in single NRs as well as the contact potential difference between the tip and NRs' surface is achieved from an analytical fitting of the phase shift - voltage curve. Both of them significantly vary with the laser intensity and the NR's size and construction. The photogenerated charging and decharging rates are obtained at a timescale of seconds or slower, indicating that the Si NRs are promising candidates in photovoltaic applications.

引用

页码：1 / 8

页数：8

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