期刊
ADVANCED FUNCTIONAL MATERIALS
卷 20, 期 6, 页码 907-913出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200901803
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资金
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
- Ministry of Education, Culture, Sports, Science, and Technology, Japan
- Advanced Technology Institute Foundation
- Kinki Invention Center (Foundation)
An electronegative conjugated compound composed of a newly designed carbonyl-bridged bithiazole unit and trifluoroacetyl terminal groups is synthesized as a candidate for air-stable n-type organic field-effect transistor (OFET) materials. Cyclic voltammetry measurements reveal that carbonyl-bridging contributes both to lowering the lowest unoccupied molecular orbital energy level and to stabilizing the anionic species. X-ray crystallographic analysis of the compound shows a planar molecular geometry and a dense molecular packing, which is advantageous to electron transport. Through these appropriate electrochemical properties and structures for n-type semiconductor materials, OFET devices based on this compound show electron mobilities as high as 0.06 cm(2) V-1 with on/off ratios of 106 and threshold voltages of 20V under vacuum conditions. Furthermore, these devices show the same order of electron mobility under ambient conditions.
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