High-performance self-powered/active humidity sensing of Fe-doped ZnO nanoarray nanogenerator

被引：78
作者：
Zhu, Dan [1 ]
Hu, Tianxiang [1 ]
Zhao, Yayu [1 ]
Zang, Weili [1 ]
Xing, Lili [1 ]
Xue, Xinyu [1 ]
机构：
[1] Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 213卷
基金：
中国国家自然科学基金;
关键词：
Self-powered; Fe-doped ZnO; Humidity sensor; Nanogenerator; GROWTH; SENSOR; PHOTOLUMINESCENCE; FILMS;
D O I：
10.1016/j.snb.2015.02.119
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
High performance self-powered/active humidity sensors have been fabricated from Fe-doped ZnO nanoarrays. When the relative humidity (RH) is 60% at room temperature, the piezoelectric output voltage of the humidity sensor under compressive force decreases from 0.85 (at 5% RH) to 0.21 V. The self-powered humidity sensing performance of Fe-doped ZnO nanoarrays is much higher than that of undoped ZnO nanoarrays. Fe3+ ions have small ionic radius and many positive charges (+3), thus the doping of Fe can lead to a high charge density, which can probably result in a large amount of adsorbed water molecules on the surface of Fe-doped ZnO NWs, enhancing the screening effect and decreasing the piezoelectric output. The present results demonstrate a new material system for high-performance self-powered/active humidity sensors. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：382 / 389
页数：8
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