Centrosymmetric Thiophenemethyleneoxindole‐Based Donor–Acceptor Copolymers for Organic Field‐Effect Transistors,Macromolecular Rapid Communications

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Centrosymmetric Thiophenemethyleneoxindole‐Based Donor–Acceptor Copolymers for Organic Field‐Effect Transistors
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-05-03 , DOI: 10.1002/marc.201800073
Zhifeng Deng ₁ , Leiquan Li ₁ , Taotao Ai ₁ , Xiaoli Hao ₁ , Weiwei Bao ₁

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Two novel, donor–acceptor‐type π‐conjugated polymers (P1 and P2) with 3′‐(thieno[3,2‐b]thiophene‐2,5‐diylbis(methan‐1‐yl‐1‐ylidene))bis‐(indolin‐2‐one) (ITTI) as the acceptor and thiophene/bithiophene as the donor are designed and synthesized by palladium‐catalyzed Stille coupling. The optical and electrochemical properties of these polymers are characterized and further implemented into organic field‐effect transistors (OFET). Both polymers exhibit excellent thermal stability, broad UV–vis absorption, and high highest occupied molecular orbital energy levels. Thermal annealing induces a well‐ordered structure, a highly planar π‐system (oxygen–sulfur interaction), and a bathochromic shift in the polymers; furthermore, significant enhancement of the long wavelength intensity is also observed. Both polymers exhibit p‐type charge transport behavior, with hole mobilities up to 0.51 cm² V⁻¹ s⁻¹ for P1 and 0.65 cm² V⁻¹ s⁻¹ for P2. This work demonstrates that ITTI can be a promising building block for the construction of donor–acceptor polymers with high‐performance OFETs.

中文翻译：

中心对称的噻吩亚甲基恶吲哚基供体-受体共聚物，用于有机场效应晶体管

两种新颖的，供体-受体型π共轭聚合物（P1和P2），带有3'-（硫代[3,2-b]噻吩-2,5-二基双（甲烷-1-基-1-基]）通过钯催化的Stille偶联设计并合成了（indolin-2-one）（ITTI）作为受体，噻吩/联噻吩作为供体。对这些聚合物的光学和电化学性质进行了表征，并进一步实现在有机场效应晶体管（OFET）中。两种聚合物均表现出优异的热稳定性，广泛的紫外线可见吸收性和最高的最高分子轨道能级。热退火导致聚合物结构井然有序，高度平面的π系统（氧-硫相互作用）和聚合物的红移。此外，还观察到长波长强度的显着增强。两种聚合物均表现出p型电荷传输行为，² V ^-1小号^-1为P1和0.65厘米² V ^-1小号^-1为P2。这项工作表明，ITTI可以成为构建具有高性能OFET的供体-受体聚合物的有前途的基石。

更新日期：2018-05-03

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