Synthesis and Characterization of Anthra[2,3-b]thiophene and Tetraceno[2,3-b]thiophenes for Organic Field-Effect Transistor Applications
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- 作者：Famil Valiyev ; Wei-Shan Hu ; Hsing-Yin Chen ; Ming-Yu Kuo ; Ito Chao ; Yu-Tai Tao
- 刊名：Chemistry of Materials
- 出版年：2007
- 出版时间：June 12, 2007
- 年：2007
- 卷：19
- 期：12
- 页码：3018 - 3026
- 全文大小：1098K
- 年卷期：v.19,no.12(June 12, 2007)
- ISSN：1520-5002
文摘
A series of thiophene-fused acenes, anthra[2,3-b]thiophene (1), tetraceno[2,3-b]thiophene (2), and 2-n-decyl-tetraceno[2,3-b]thiophene (3), were synthesized. The crystal structures of 1 and 2 were determined.A weak dipole results from the addition of the thiophene ring, and the crystal packing changes from thetriclinic structure of acenes to orthorhombic, with the molecules maintaining the herringbone arrangementwith the molecular long axis antiparallel to the neighbors. Theoretical calculation showed that the moleculeshave higher oxidation potential and comparable hole mobility as acene analogues with the same numberof rings. Thin film transistor devices were fabricated from these materials. With compound 1, a field-effect mobility of 0.134 cm2/V s and on/off ratio of 108 can be achieved when deposited at a substratetemperature of 25 
C, whereas a mobility of 0.245 cm2/V s and on/off ratio of 106 were observed forcompound 2 deposited at 80 C.
C, whereas a mobility of 0.245 cm2/V s and on/off ratio of 106 were observed forcompound 2 deposited at 80 C.