Formaldehyde Gas Sensor Based on Pentacene Organic Thin-Film Transistor

Yu Cheng Chen; Jian Zhong; Lin Zhang

doi:10.4028/www.scientific.net/KEM.575-576.477

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 575-576Formaldehyde Gas Sensor Based on Pentacene Organic...

Formaldehyde Gas Sensor Based on Pentacene Organic Thin-Film Transistor

Abstract:

Formaldehyde (HCHO) gas sensors based on pentacene active layer and low cost poly (merthyl methacrylate) (PMMA) insulator were fabricated with a structure of bottom contact organic thin-film transistor (OTFT). The OTFT sensor not only presented a remarkable response characteristic in the absence and the presence of HCHO gas with different concentrations, but also exhibited a good repeatability for sensing the HCHO gas. Meanwhile, compared to the device operated in nitrogen circumstance, obvious changes in saturation drain-source current (I_DS) and off-state current were observed when the device exposed to HCHO gas. Also the device performance and sensing mechanisms were discussed.

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Key Engineering Materials (Volumes 575-576)

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477-480

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https://doi.org/10.4028/www.scientific.net/KEM.575-576.477

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Online since:

September 2013

Authors:

Yu Cheng Chen, Jian Zhong, Lin Zhang

Keywords:

Formaldehyde Gas, Gas Sensor, Organic Thin-Film Transistor (OTFT), PMMA

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