A study on photo-generated charges property in highly ordered TiO2 nanotube arrays

被引：34

作者：

Zhang, Yu ^{[1
]}

Wang, Dejun ^{[1
]}

Pang, Shan ^{[2
]}

Lin, Yanhong ^{[1
]}

Jiang, Tengfei ^{[1
]}

Xie, Tengfeng ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, Changchun 130023, Peoples R China

[2] Henan Univ, Key Lab Special Funct Mat, Kaifeng 475001, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2010年 / 256卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Titania nanotube array; Photo-generated charge; Surface photovoltage; SURFACE PHOTOVOLTAGE; PHOTOGENERATED CHARGES; ZNO NANORODS; FABRICATION; TRANSPORT; TEMPLATE; TITANIUM;

D O I：

10.1016/j.apsusc.2010.05.054

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study TiO2 nanotube arrays were fabricated by potentiostatic anodization of titanium sheet. The Xray diffraction (XRD) pattern and field emission scanning electron microscopy (FE-SEM) image indicated the TiO2 nanotube arrays were of pure anatase form and highly ordered. The properties of the photogenerated charges in the nanotube arrays were investigated by transient photovoltage (TPV) technique and surface photovoltage (SPV) technique based on lock-in amplifier with dc bias, in comparison with the commercial powder derived film. The separation processes of the photo-induced charges in the system of TiO2 nanotubes on Ti have been demonstrated to be correlated with the incident light intensity, surface trapping states, and the interfacial electric field between Ti and TiO2. The results also show that the highly ordered nanotube film could generate much stronger SPV responses under external electric field than the commercial powder derived film. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：7217 / 7221

页数：5

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