期刊
APPLIED PHYSICS LETTERS
卷 106, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4918288
关键词
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资金
- New Energy and Industrial Technology Development (NEDO) through its Innovative Solar Cell Program
- Grants-in-Aid for Scientific Research [26246014] Funding Source: KAKEN
We report the fabrication of high quality thin films for semiconducting organic donor-acceptor charge-transfer (CT) compounds, (diC(8)BTBT)(F(n)TCNQ) (diC(8)BTBT = 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene and F(n)TCNQ [n = 0,2,4] = fluorinated derivatives of 7,7,8, 8,-tetracyanoquinodimethane), which have a high degree of layered crystallinity. Single-phase and uniaxially oriented polycrystalline thin films of the compounds were obtained by co- evaporation of the component donor and acceptor molecules. Organic thin- film transistors (OTFTs) fabricated with the compound films exhibited n-type field- effect characteristics, showing a mobility of 6.9 x 10(-2) cm(2)/V s, an on/off ratio of 10(6), a sub-threshold swing of 0.8 V/dec, and an excellent stability in air. We discuss the suitability of strong intermolecular donor-acceptor interaction and the narrow CT gap nature in compounds for stable n-type OTFT operation. (C) 2015 AIP Publishing LLC.
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