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Bis(7-aza-2-oxoindolin-3-ylidene)dihydropyrroloindole-dione based D−A conjugated polymers for electron and ambipolar organic thin film transistors
Dyes and Pigments ( IF 4.1 ) Pub Date : 2018-06-26 , DOI: 10.1016/j.dyepig.2018.06.045
Feifei Wang , Weiwei Wang , Yu Liu , Yanrong Dai , Hongbo Lu , Yunsheng Ding , Longzhen Qiu , Guobing Zhang

A new strongly electron-deficient acceptor unit, (3E, 7E)-3,7-bis(6-bromo-7-aza-2-oxoindolin-3-ylidene)-5,7-dihydropyrrolo [2,3-f] indole-2,6(1H,3H)-dione (BADDP, Fig. 1), was designed and synthesized for the first time. Two donor−acceptor (D−A) conjugated polymers, namely P1 and P2, were also synthesized using the new strongly electron-withdrawing unit as the acceptor and thieno [3,2-b]thiophene (TT) and (E)-2-(2-(thiophen-2-yl)vinyl)thiophene (TVT) as the donor units. Their thermal, photophysical, microstructural, and field-effect properties were systematically investigated. Both the polymers with deep lowest unoccupied molecular orbital (LUMO) energy levels (approximately −3.9 eV) for marching with electron transport showed n-type charge transport characteristics with an electron mobility of 0.18 cm2 V−1 s−1 under vacuum conditions. Moreover, ambipolar behavior was also obtained with a hole mobility of up to 0.20 cm2 V−1 s−1 and an electron mobility of up to 5.8 × 10−2 cm2 V−1 s−1 when exposed to air.



中文翻译:

基于双(7-氮杂-2-氧吲哚-3-基)二氢吡咯并吲哚-二酮的D-A共轭聚合物,用于电子和双极性有机薄膜晶体管

一种新的强电子亏缺受体单元,(3E,7E)-3,7-双(6-溴-7-氮杂-2-氧代吲哚-3-亚基)-5,7-二氢吡咯并[2,3- f ]首次设计并合成了吲哚-2,6(1 H,3 H)-二酮(BADDP,图1)。两个供体-受体(d-A)的共轭聚合物,即P1P2,使用新的强吸电子单元作为受体和噻吩并[3,2-b]噻吩(TT)和(还合成ë)-2-(2-(噻吩-2-基)乙烯基)噻吩(TVT)作为供体单元。系统地研究了它们的热,光物理,微结构和场效应性质。用于通过电子传输前进的具有最低的最低未占据分子轨道(LUMO)能级(约-3.9 eV)的两种聚合物均显示n型电荷传输特性,在真空条件下的电子迁移率为0.18 cm 2  V -1  s -1。此外,还获得了双极性行为,空穴迁移率高达0.20 cm 2  V -1  s -1,电子迁移率高达5.8×10 -2  cm 2  V -1  s-1当暴露于空气中时。

更新日期:2018-06-26
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