Ding Yafei, Zhao Fengsheng, Kim Sanghyo, Wang Xiaohong, Lu Hongbo, Zhang Guobing, Cho Kilwon, Qiu Longzhen
National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, and Special Display and Imaging Technology Innovation Center of Anhui Province, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei 230009, China.
Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, South Korea.
ACS Appl Mater Interfaces. 2020 Sep 16;12(37):41832-41841. doi: 10.1021/acsami.0c11436. Epub 2020 Aug 31.
Developing nonchlorinated solvent-processed polymeric semiconductors to avoid environmental concerns and health hazards caused by chlorinated solvents is especially urgent. Here, a molecular design strategy, composed of backbone fluorination and side chain optimization, is used for preparing high-solubility and high-performance azaisoindigo-based polymers. The effects of different backbones and side chains on the solubility, film crystallinity, molecular stacking, and charge transport properties are mainly investigated. A long linear hybrid siloxane-based chain (C-Si) is chosen to improve the solubility, while the incorporation of fluorine (F) is used to enhance the film crystallinity and charge mobility. By optimizing the backbone and side chain, both solubility and charge mobility of the azaisoindigo-based polymer are significantly improved. As a result, films processed with toluene, tetrahydrofuran, ether, and alkanes, achieved charge mobilities of 4.14, 3.78, 2.14, and 2.34 cm V s, respectively. The current study provides an effective strategy for the design and synthesis of high-performance polymeric semiconductors processed with nonchlorinated solvents.
开发非氯化溶剂处理的聚合物半导体以避免氯化溶剂引起的环境问题和健康危害尤为迫切。在此，一种由主链氟化和侧链优化组成的分子设计策略被用于制备高溶解性和高性能的氮杂异吲哚啉酮基聚合物。主要研究了不同主链和侧链对溶解度、薄膜结晶度、分子堆积和电荷传输性能的影响。选择长线性杂化硅氧烷基链（C-Si）来提高溶解度，同时引入氟（F）来增强薄膜结晶度和电荷迁移率。通过优化主链和侧链，氮杂异吲哚啉酮基聚合物的溶解度和电荷迁移率均得到显著提高。结果，用甲苯、四氢呋喃、醚和烷烃处理的薄膜分别实现了4.14、3.78、2.14和2.34 cm V s的电荷迁移率。本研究为设计和合成用非氯化溶剂处理的高性能聚合物半导体提供了一种有效策略。
