Transient characteristics and negative photoconductivity of SbSI humidity sensor

被引：27
作者：
Nowak, M. [1 ]
Mistewicz, K. [1 ]
Nowrot, A. [1 ]
Szperlich, P. [1 ]
Jesionek, M. [1 ]
Starczewska, A. [1 ]
机构：
[1] Silesian Tech Univ, Inst Phys, Ctr Sci & Educ, PL-44100 Gliwice, Poland
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2014年 / 210卷
关键词：
Humidity sensors; Antimony sulfoiodide (SbSI); Nanowires; Photoconductivity; OXIDE NANOBELTS; SOLID-SURFACES; WATER; SPECTROSCOPY;
D O I：
10.1016/j.sna.2014.02.004
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents the influence of water vapor on the photoconductivity of antimony sulfoiodide (SbSI) nanowires obtained sonochemically. It is done to explore the applicability of SbSI photoconductor as a humidity sensor. Character of the response of DC photoconductivity current on the switching on and switching off illumination of SbSI gel depends on relative humidity (RH) of nitrogen environment. While positive photoconductivity is observed for low RH, the negative effect occurs for high RH. The least square fitting of the transient characteristics of photoconductivity allowed to present equivalent photoelectric model of SbSI gel. The changes of the parameters of the model with increasing humidity and illumination intensity are presented. Mechanism of light-induced desorption of H2O from SbSI nanowires' surface is discussed. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：32 / 40
页数：9
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