Charge transport and trapping in organic field effect transistors exposed to polar analytes

被引：28

作者：

Duarte, Davianne ^{[1
]}

Sharma, Deepak ^{[1
]}

Cobb, Brian ^{[1
]}

Dodabalapur, Ananth ^{[1
]}

机构：

[1] Univ Texas Austin, Microelect Res Ctr, Austin, TX 78758 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 13期

基金：

美国国家科学基金会;

关键词：

THIN-FILM-TRANSISTORS; CHEMICAL SENSORS; MOBILITY; TEMPERATURE;

D O I：

10.1063/1.3569592

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Pentacene based organic thin-film transistors were used to study the effects of polar analytes on charge transport and trapping behavior during vapor sensing. Three sets of devices with differing morphology and mobility (0.001-0.5 cm(2)/V s) were employed. All devices show enhanced trapping upon exposure to analyte molecules. The organic field effect transistors with different mobilities also provide evidence for morphology dependent partition coefficients. This study helps provide a physical basis for many reports on organic transistor based sensor response. (C) 2011 American Institute of Physics. [doi:10.1063/1.3569592]

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