Unidirectional Macroscopic Alignment of Chlorobenzo[c]-[1,2,5]thiadiazole-Based Semiconducting Copolymers with Controlled Regiochemistry,Advanced Electronic Materials

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Unidirectional Macroscopic Alignment of Chlorobenzo[c]-[1,2,5]thiadiazole-Based Semiconducting Copolymers with Controlled Regiochemistry
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2021-08-13 , DOI: 10.1002/aelm.202100551
Sein Chung ₁ , Yongjoon Cho ₂ , Jinsung Kim ₁ , Seon Baek Lee ₁ , Chaneui Park ₁ , Seunghyun Kim ₁ , Boseok Kang ₃ , Changduk Yang ₂ , Kilwon Cho ₁

Affiliation

Solution-processable donor–acceptor-type conjugated copolymers are considered one of the most promising alternatives to inorganic semiconductors. The introduction of strong electron-withdrawing groups in the acceptor units of the copolymers has been shown to favor fast charge transport; however, the correlation among the halogen-substituted molecular structure, solid-state packing, and charge transport properties is unclear. In this study, new chlorine-atom-substituted donor–acceptor copolymers comprising chlorobenzo[c]-[1,2,5]thiadiazole and 4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b′]dithiophene are synthesized and their physicochemical properties are compared with those of their unsubstituted or nitrogen-incorporated backbone analogs. In addition, the regioregularity of the synthesized copolymers is controlled to investigate the effects of regiochemistry on the polymer backbone alignment using the nanogroove method. The results demonstrate that different degrees of regioregularity in the main chains induce a substantially dissimilar effect of the nanogroove and capillary force on the orientation of the polymer backbone, long-range crystalline order, and charge transport properties of the conjugated polymers.

中文翻译：

具有受控区域化学的氯苯[c]-[1,2,5]噻二唑基半导体共聚物的单向宏观取向

可溶液加工的供体-受体型共轭共聚物被认为是无机半导体最有前途的替代品之一。在共聚物的受体单元中引入强吸电子基团已被证明有利于快速电荷传输；然而，卤素取代的分子结构、固态堆积和电荷传输特性之间的相关性尚不清楚。在这项研究中，新的氯原子取代的供体-受体共聚物包含氯苯并[ c ]-[1,2,5]噻二唑和4,4-二十六烷基-4 H-环戊二烯[1,2- b :5,4-乙']二噻吩被合成，并将它们的物理化学性质与其未取代或掺入氮的骨架类似物的物理化学性质进行比较。此外，控制合成共聚物的区域规整性，以使用纳米槽方法研究区域化学对聚合物主链排列的影响。结果表明，主链中不同程度的区域规整性导致纳米凹槽和毛细管力对聚合物主链的取向、长程结晶顺序和共轭聚合物的电荷传输性质产生显着不同的影响。

更新日期：2021-08-13

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