噻唑乙烯类聚合物的设计合成及其聚集态结构表征  

Design,Synthesis and Aggregation Structure Characterization of Thiazole-Vinyl Polymer

作　　者：刘佳 巨世杰 程智敏 夏思梦 秦红梅 李宇翔 LIU Jia;JU Shijie;CHENG Zhimin;XIA Simeng;QIN Hongmei;LI Yuxiang(School of Materials Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]西安科技大学材料科学与工程学院,西安710054

出　　处：《功能高分子学报》2024年第2期121-129,共9页Journal of Functional Polymers

基　　金：国家自然科学基金青年项目(52203421,21905225);陕西省自然科学基础研究计划项目(2022JM-229)。

摘　　要：聚噻吩(PTs)是有机太阳能电池(OSCs)中很有前途的电子给体材料,但其较高的分子能级和不利的活性层形貌限制了其光伏器件性能的提升。在聚噻吩乙烯(PTVT-T)结构的基础上引入噻唑单元,设计合成了一种新型聚噻唑乙烯类材料(PTzV-T)。通过紫外-可见吸收光谱、电化学循环伏安法以及二维掠入射广角X射线散射等对PTzV-T的能级结构和聚集态结构进行了表征。结果表明:PTzV-T不仅具有较低的最高占据分子轨道(HOMO)能级(-5.88 eV),而且呈现出高度的分子平面性;在溶剂氯仿、氯苯和邻二甲苯中均表现出不同的预聚集行为和温度依赖性,采用这3种溶剂制备的薄膜也呈现出不同的晶体堆积方式和结晶强度。Polythiophene(PTs) is a promising electron donor in organic solar cells(OSCs) due to its simple structure and excellent synthetic scalability.However,the high HOMO(highest occupied molecular orbital) energy level of PTs and the unfavorable active layer morphology limit the performance improvement of PTs-based OSC device.Herein,in order to solve the disadvantage of high HOMO energy level of PTs,a highly planar polymer donor poly(thiazole-ethylene)derivatives(PTzV-T) was designed and synthesized by introducing an ester-functional thiazole-vinyl structure as electronwithdrawing unit into the reported poly(thiophene vinylene) derivative(PTVT-T).The aggregation behavior and energy structure were characterized by ultraviolet-visible(UV-Vis) absorption spectroscopy,electrochemical cyclic voltammetry and two-dimensional grazing incidence wide-angle X-ray scattering.Results show that the polymer PTzV-T has a low HOMO energy level(-5.88 eV) and solid planarity,and shows different preaggregation behaviors and temperature dependence in chloroform,chlorobenzene and o-xylene solvents.The films prepared with these three solvents also show different crystal packing modes and crystallinity.

关 键 词：聚噻吩 噻唑乙烯 电子给体 聚集态结构 有机太阳能电池 

分 类 号：O633.5[理学—高分子化学]