Vinyl flanked amorphous conjugated polymer by Knoevenagel condensation of diketopyrrolopyrrole and indacenodithiophene for flexible transistor  

通过Knoevenagel缩合双酮吡咯和吲哚二噻吩得到乙烯基链接的非晶态共轭聚合物并应用于柔性晶体管

作　　者：Yanlin Chen Pinyu Chen Shihong Zhou Zhiwei Yang Haijun Long Xianfeng Liang Tianwen Chen Jing Li Luxi Tan Haoli Zhang Lichun Dong Zitong Liu 陈雁琳;陈品宇;周仕弘;杨志伟;龙海军;梁先峰;陈天文;黎静;谭陆西;张浩力;董立春;刘子桐(School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China;State Key Laboratory of Applied Organic Chemistry(SKLAOC),Key Laboratory of Special Function Materials and Structure Design(MOE),College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China;Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China)

机构地区：[1]School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China [2]State Key Laboratory of Applied Organic Chemistry(SKLAOC),Key Laboratory of Special Function Materials and Structure Design(MOE),College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China [3]Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China

出　　处：《Science China Materials》2025年第1期110-116,共7页中国科学(材料科学)(英文版)

基　　金：National Natural Science Foundation of China (NSFC)(21404107, 22175081, and 22375080)。

摘　　要：Conjugated polymers exhibit exceptional adaptability in flexible thin-film transistors,owing to their inherent flexibility and high charge mobility.Nonetheless,achieving conjugated polymers that demonstrate both high mobility and stability under mechanical stress,such as bending or stretching,remains a significant challenge.In this study,we synthesized an ethylene-bridged conjugated polymer,PDPPVIDT,derived from methyl-side diketopyrrolopyrrole(DPP)and indacenodithiophene(IDT)aldehydes,using an environmentally friendly Knoevenagel condensation reaction under mild conditions,resulting in a moderate yield with promising scalability.Conventional characterization techniques revealed enhanced backbone planarity with stableπ-πstacking,while thin films of PDPPVIDT displayed a nearamorphous nature due to the conformational isomerism of the ethylene bond.This structure enables simultaneous charge transport and flexibility.Consequently,flexible organic thinfilm transistor(OTFT)devices based on PDPPVIDT demonstrated excellent hole mobility(μh)reaching up to 1.70 cm^(2) V^(−1) s^(−1),along with high mechanical bending resilience.This work underscores the potential of vinyl-bridged donor-acceptor conjugated polymers,highlighting the industrial adaptability of their production process and offering new insights for the design and synthesis of future flexible electronic materials.共轭聚合物在柔性薄膜晶体管器件中展现出广泛的应用潜力.然而,设计和合成具有高迁移率与优良弯曲(或拉伸)稳定性的共轭聚合物仍面临诸多挑战.本文报道了一种具有乙烯基链接的共轭聚合物PDPPVIDT,该聚合物通过双侧甲基取代的双酮吡咯(DPP)和茚并二噻吩(IDT)二醛单体,采用环境友好的Knoevenagel缩合反应合成.该反应条件温和,且具备良好的环境友好性及规模化潜力.研究结果表明,聚合物主链的平面性得以增强,并且显示出稳定的π-π堆积特性.此外,由于乙烯基的构象异构化特性, PDPPVIDT薄膜呈现出近乎无定形的特性,从而同时确保了电荷传输效率与柔韧性.基于PDPPVIDT的柔性有机薄膜晶体管(OTFT)器件展示出高达1.70 cm^(2)V^(−1)s^(−1)的优异迁移率和良好的机械弯曲恢复能力.该研究展示了乙烯基链接D-A共轭聚合物的潜力,并强调了其生产过程的工业适应性,为未来柔性电子材料的设计与合成提供了新的思路.

关 键 词：D-A conjugated polymers DIKETOPYRROLOPYRROLE flexible thin-film transistors indacenodithiophene Knoevenagel condensation 

分 类 号：TN321.5[电子电信—物理电子学] TQ317[化学工程—高聚物工业]