Fabrication of n-CdTe/p-polyaniline heterojunction-based room temperature LPG sensor

被引：62

作者：

Joshi, S. S. ^{[1
]}

Gujar, T. P. ^{[1
]}

Shinde, V. R. ^{[1
]}

Lokhande, C. D. ^{[1
]}

机构：

[1] Shivaji Univ, Dept Phys, Thin Film Phys Lab, Kolhapur 416004, Maharashtra, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2008年 / 132卷 / 01期

关键词：

CdTe; polyaniline; heterojunction; LPG; gas sensor;

D O I：

10.1016/j.snb.2008.01.059

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The response of a heterojunction formed with n-CdTe and p-polyaniline to liquefied petroleum gas (LPG) has been investigated using forward bias current measurement at room temperature. The CdTe and polyaniline films were deposited using electrodeposition technique. The thickness of CdTe and polyaniline was optimized in order to get a junction ideality factor close to unity. The n-CdTe/p-polyaniline junction fabricated under optimized conditions exhibited rectifying current-voltage (I-V) characteristics with a rectification ratio of 7 x 10(3) and a junction ideality factor of 1.28. The junction was found to be sensitive to LPG at an operating temperature of 300 K. The LPG response was tested through the shift in forward biased I-V curves at different concentrations of LPG. Maximum response up to 67.7% was observed for 0.14 vol% of LPG. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：349 / 355

页数：7

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