分子量对共轭高分子薄膜结构和电学性能的影响  

Effect of molecular weight on microstructure and electrical properties of conjugated polymer films

作　　者：李赛萌 韩洋 叶龙[1,2,3] Saimeng Li;Yang Han;Long Ye(School of Materials Science and Engineering,Tianjin Key Laboratory of Materials Composites and Functionalization,Tianjin University,Tianjin 300350,China;State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学材料科学与工程学院,天津市材料复合与功能化重点实验室,天津300350 [2]中国科学院长春光学精密机械与物理研究所,应用光学国家重点实验室,长春130033 [3]天津大学,天津市分子光电科学重点实验室,天津300350

出　　处：《中国科学：化学》2022年第4期523-535,共13页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:52073207);应用光学国家重点实验室开放基金(编号:2021E7-0035)资助。

摘　　要：共轭高分子是由碳、氢、氮、硫等元素构成的软物质材料,在柔性显示、逻辑电路、光伏面板为代表的印刷电子产业中具有巨大的应用前景.分子量的变化可以直接影响共轭高分子的固态微观结构,进而影响其光电性能.本文依次阐述了分子量对无定形共轭高分子、次晶性共轭高分子和半结晶共轭高分子的薄膜聚集态结构以及电荷传输性能的影响规律.随后对分子量、微结构以及太阳能电池和薄膜晶体管性能的关系进行了总结.最后,对目前亟待解决的科学问题和未来的发展方向进行了展望.希望通过评述共轭高分子的分子量这一重要结构参数的研究进展,帮助读者加深对分子量的影响机制的理解,进一步为调控有机光电薄膜的结构与性能提供指导.Conjugated polymers are soft materials composed of carbon,hydrogen,nitrogen,sulfur and other elements,which have great application prospects in the printed electronics industry represented by flexible displays,logic circuits and photovoltaic panels.The change of molecular weight can directly affect the solid microstructure of conjugated polymers and then affect their photoelectric properties.In this review,the influence of molecular weight on the aggregation structure and charge transport properties of amorphous,paracrystalline and semi-crystalline conjugated polymers are described successively.Then,the relationship between molecular weight,microstructure,and performance(solar cells and thin-film transistors)is summarized.Finally,the urgent scientific problems to be solved at present and the future directions are outlined.We hope that this review on the molecular weight effects of conjugated polymers,which is an important structural parameter,can help readers deepen their understanding of the influence mechanism of molecular weight and further provide guidance for the regulation of the structure and properties of organic photoelectric films.

关 键 词：共轭高分子 分子量 聚集态结构 迁移率 能量转换效率 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TQ317[化学工程—高聚物工业]