期刊
ORGANIC ELECTRONICS
卷 24, 期 -, 页码 96-100出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2015.05.022
关键词
Pentacene; Ultrathin film; Top contact configuration; NO2 gas sensor
资金
- National Basic Research Program of China [2011 CB932800]
- National Natural Science Foundation of China [21432005, 11074056, 11104042]
By optimization of structural and physical-chemical properties at a precision level of molecules, organic sensing devices seek to realize the state of the art in monolayer based device applications. In our work, pentacene ultrathin film transistor has been integrated into the implement of a gas sensor based on an increase in its mobility and a shift of its threshold voltage. A limit of detection of pentacene monolayer field-effect transistor was found to be at sub ppm level when it is applied for detection of NO2. Compared with a thick layer sensor device, the pentacene monolayer NO2 sensor has boosted up sensing response with three orders of magnitude. An enhancement of high selectivity and response mechanism can be understood with a reasonable description emphasizing on the 2D transport characters and a series of gauzy interplay for monolayer pentacene film with NO2 analyte. (C) 2015 Elsevier B.V. All rights reserved.
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