Influence of surface Pd doping on gas sensing characteristics of SnO2 thin films deposited by spray pirolysis

被引：126
作者：
Korotcenkov, G
Brinzari, V
Boris, Y
Ivanova, M
Schwank, J
Morante, J
机构：
[1] Tech Univ Moldova, Dept Micro & Optoelect, Kishinev, Moldova
[2] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA
[3] Univ Barcelona, Dept Elect, E-08007 Barcelona, Spain
来源：
THIN SOLID FILMS | 2003年 / 436卷 / 01期
关键词：
SnO2; pyrolysis; thin films; Pd doping; gas response; kinetics;
D O I：
10.1016/S0040-6090(03)00506-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this article the analysis of steady state and transient gas sensing characteristics of undoped and Pd surface doped SnO2 films, deposited by spray pyrolysis, is described. The influence of parameters such as air humidity (2-50% RH), operation temperature (25-500 degreesC) and Pd surface concentration (0-1% ML Pd) on gas response to CO and H-2 (0.1-0.5%), response time, shape of sensitivity S(T) curves and activation energy of tau(1/kT) dependencies are discussed. A mechanism based on a chemisorption model is proposed to explain how Pd influences the gas sensing characteristics of SnO2 films. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：119 / 126
页数：8
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