CuO-doped BSST thick film resistors for ppb level H2S gas sensing at room temperature

被引：38

作者：

Jain, G. H. ^{[1
]}

Patil, L. A. ^{[1
]}

机构：

[1] Pratap Coll, PG Dept Phys, Mat Res Lab, Amalner 425401, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2007年 / 123卷 / 01期

关键词：

p-CuO; n-BSST; heterojunctions; gas response; room temperature H2S sensor; response time; recovery time;

D O I：

10.1016/j.snb.2006.08.026

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An effort has been made to develop a heterojunction type CuO-(Ba0.8Sr0.2)(Sn0.8Ti0.2)O-3 (BSST) gas sensor which could detect an extremely small amount of H2S gas atroom temperature. The BSST solid solution was prepared mechanochemically. Copper was doped in the BSST ceramics by adding CUCl2, followed by sintering at 550(circle)C for 2 h. Sintering converts CuCl2 into CuO. CuO is known to be p-type and BSST as an n-type semiconductor. Copper oxide grains in association with BSST form p-CuO/n-BSST heterojunctions. The thick films of CuO-BSST were prepared by screen-printing technique. The CuO-BSST heterojunction gas sensor is a new type gas sensor and has many advantages, such as low cost, simple processing, and convenient testing. This sensor was observed to be highly sensitive and selective to a ppb level of H2S gas at room temperature. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：246 / 253

页数：8

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