A novel solution-processable dicyano-substituted quinoidal oligothiophene molecule CDT-2T(CN)4 was synthesized and characterized. CDT-2T(CN)4 displayed high thermal stability and broad thin film absorption in the near IR region. Electrochemical results showed that CDT-2T(CN)4 exhibited reversible oxidation and reduction peaks with the LUMO energy level at −4.2 eV and the HOMO energy level at −5.3 eV. The solution processed thin film transistors of CDT-2T(CN)4 displayed electron-dominant ambipolar transport behavior under ambient conditions. The optimal saturation hole and electron mobilities were 0.003 and 0.023 cm2 V−1 s−1, respectively, one of the highest values for solution processed quinoidal based ambipolar organic semiconductors with good ambient stability.
一种新型可溶液加工的二
氰基取代醌式寡
噻吩分子CDT-2T(CN)4被合成和表征。CDT-2T(CN)4表现出高热稳定性和近红外区域的宽薄膜吸收。电
化学结果显示,CDT-2T(CN)4具有可逆的氧化还原峰,LUMO能级为-4.2 eV,HOMO能级为-5.3 eV。在环境条件下,CDT-2T(CN)4的溶液加工薄膜晶体管表现出电子占优势的双极性传输行为。最优饱和空穴和电子迁移率分别为0.003和0.023 cm2 V−1 s−1,这是具有良好环境稳定性的溶液加工醌式基双极性有机半导体中最高值之一。