Title: Porous Organic TFTs for the Applications on Real-Time and Sensitive Gas Sensors
Authors: Zan, Hsiao-Wen
Dai, Ming-Zhi
Hsu, Ting-Yu
Lin, Hung-Cheng
Meng, Hsin-Fei
Yang, Yuh-Shyong
生物科技學系
物理研究所
光電工程學系
顯示科技研究所
Department of Biological Science and Technology
Institute of Physics
Department of Photonics
Institute of Display
Keywords: Ammonia;gas sensor;pentacene;porous;thin-film transistor (TFT)
Issue Date: 1-Aug-2011
Abstract: A pentacene-based organic thin-film transistor (OTFT) with a porous active layer is demonstrated for the first time. The porous OTFT exhibits a fast, sensitive, and reversible response to ammonia gas with a detection limit as 500 ppb, whereas the OTFT without porous structure has a slow response and a poor recovery behavior. The sensing mechanism dominated by the dissociation of hydroxyl groups of the polymer dielectric layer is raised and discussed. The proposed device is the first OTFT-based ammonia sensor with reversible response and high sensitivity in low parts-per-million range. It is promising for the development of a diagnostic breath analysis system.
URI: http://dx.doi.org/10.1109/LED.2011.2155025
http://hdl.handle.net/11536/20904
ISSN: 0741-3106
DOI: 10.1109/LED.2011.2155025
Journal: IEEE ELECTRON DEVICE LETTERS
Volume: 32
Issue: 8
Begin Page: 1143
End Page: 1145
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