High-sensitivity NO2 sensor based on n-type InP epitaxial layers

被引:0
|
作者
Wierzbowska, Katarzyna
Adamowicz, Boguslawa
Mazet, Lionel
Brunet, Jerome
Pauly, Alain
Bideux, Luc
Varenne, Christelle
Laure, Berry
Germain, Jean-Paul
机构
[1] Silesian Tech Univ, Dept Appl Phys, Inst Phys, PL-44100 Gliwice, Poland
[2] Univ Clermont Ferrand, LASMEA, Clermont Ferrand, France
关键词
indium phosphide; epitaxial layers; gas sensors; resistance; surface states; computer simulations; SEMICONDUCTOR INTERFACES; INSULATOR-SEMICONDUCTOR; GAS SENSORS; OXIDES; MODEL;
D O I
暂无
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The structure and sensing properties of a novel resistive NO2 sensor based on n-type InP epitaxial layers have been presented. The studies of sensor resistance changes due to adsorbed gas NO2 under exposures in the range from 20 to 100 ppb at a temperature of 80 degrees C were performed. The thickness of the active InP layer changed from 0.2 to 0.4 mu m. The response time and signal stability were also investigated. Furthermore, the influence of surface states and near-surface region on sensor parameters in terms of the resistance relative changes was shown from numerical simulations. The analysis, of the measured photoelectron spectroscopy (XPS) spectra confirmed the complex chemical composition of the InP oxides, which gives rise to the high density of surface states.
引用
收藏
页码:655 / 662
页数:8
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