Electronegative oligothiophenes for n-type semiconductors: difluoromethylene-bridged bithiophene and its oligomers |
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Authors: | Ie Yutaka Nitani Masashi Ishikawa Motomi Nakayama Ken-ichi Tada Hirokazu Kaneda Takahiro Aso Yoshio |
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Affiliation: | The Institute of Scientific and Industrial Research, Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan. |
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Abstract: | The synthesis of difluoromethylene-bridged bithiophene and its oligothiophenes are reported. The spectroscopic and electrochemical measurement as well as X-ray analyses unambiguously revealed that the difluoromethylene bridge largely contributes to keeping planarity between the thiophene rings and lowering the LUMO level. The perfluorohexyl-substituted quaterthiophene derivatives showed n-type semiconducting behavior with field-effect electron mobilities up to 0.018 cm2 V-1 s-1. |
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