Influence of oxygen adsorption and diffusion on the overlapping of intergranular potential barriers in SnO2 thick films

被引：29

作者：

Ponce, MA ^{[1
]}

Castro, MS ^{[1
]}

Aldao, CM ^{[1
]}

机构：

[1] Univ Nacl Mar del Plata, CONICET, Inst Mat Sci & Technol, INTEMA, Mar Del Plata, Argentina

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2004年 / 111卷 / 01期

关键词：

tin oxide; electrical properties; Schottky barriers; gas sensors;

D O I：

10.1016/j.mseb.2004.01.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Complex impedance analysis and transient response studies in SnO2 thick films show the impedance dependence on gaseous environment and temperature. Possible mechanisms responsible for the found behaviors are proposed. The influerice of temperature on the oxygen diffusion into the grains annihilating oxygen vacancies was detected. In particular, we found the transition from having bulk regions unaffected by surface phenomena to the overlapping of potential barriers due to an oxidizing gas. (C) 2004 Published by Elsevier B.V.

引用

页码：14 / 19

页数：6

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