具有精确结构的苯并三氮唑类聚合物受体在全聚合物太阳电池中的应用  

Benzotriazole-based Polymer Acceptors with Precise Structures for All-polymer Solar Cells

作　　者：张月[1] 吴宝奇 田士增 黄薛龙 李俊宇 潘朗恒 黄飞[1] 曹镛[1] 段春晖[1] ZHANG Yue;WU Baoqi;TIAN Shizeng;HUANG Xuelong;LI Junyu;PAN Langheng;HUANG Fei;CAO Yong;DUAN Chunhui(Institute of Polymer Optoelectronic Materials&Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China;Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases,Ministry of Education,Gannan Medical University,Ganzhou 341000,China;Institute for Complex Molecular Systems,Eindhoven University of Technology,Eindhoven 5600 MB,Netherlands)

机构地区：[1]华南理工大学发光材料与器件国家重点实验室,高分子光电材料与器件研究所,广州510640 [2]赣南医学院心脑血管疾病防治教育部重点实验室,赣州341000 [3]埃因霍温理工大学复杂分子系统研究所,埃因霍温5600 MB

出　　处：《高等学校化学学报》2023年第7期181-191,共11页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:22275058,U20A6002);国家重点研发计划项目(批准号:2019YFA0705900);广东省基础与应用基础研究重点项目(批准号:2022B1515120008);广东省“珠江人才计划”引进创新创业团队项目(批准号:2019ZT08L075)资助.

摘　　要：以苯并三氮唑(BTz)为稠合中心核单元,通过调控聚合位点设计合成了两个结构精确的聚合物受体PT1-γ和PT1-δ,并研究了聚合位点对聚合物受体的光学性能、电化学性能、载流子迁移率以及全聚合物太阳电池(all-PSCs)性能的影响.研究发现,与PT1-δ相比,PT1-γ具有更窄的光学带隙和更高的电子迁移率.选用PBDB-T作为给体,基于PBDB-T∶PT1-γ的全聚合物太阳电池获得了11.92%的能量转换效率(PCE),高于PBDB-T∶PT1-δ体系的9.68%;另外,其开路电压(VOC)为0.89 V,短路电流密度(JSC)为21.25 mA/cm2,填充因子(FF)为0.63.研究结果表明,聚合位点对基于苯并三氮唑的聚合物受体的光电性能具有显著影响,因而调控单体的聚合位点是开发高性能聚合物受体的有效设计策略.In this contribution,two polymer acceptors(PT1-γand PT1-δ)based on benzotriazole(BTz)were designed and synthesized by regulating the polymerization sites.The effects of polymerization sites on the optical absorption,electrochemical energy levels,charge carrier mobility,and device performance of all-polymer solar cells(all-PSCs)were comprehensively investigated.Compared to PT1-δ,the polymer PT1-γexhibited narrower optical bandgap and higher electron mobility.As a result,the PT1-γ-based all-PSC achieved a promising power conversion efficiency(PCE)of 11.92%with an open-circuit voltage of 0.89 V,a high short-circuit current density of 21.25 mA/cm2,and a fill factor of 0.63 when blended with PBDB-T,which is higher than 9.68%of the all-PSC based on PT1-δ.This work demonstrates that the polymerization site has a very significant effect on the optoelectronic properties of benzotriazole-based polymer acceptors.Therefore,regulating the polymerization sites of monomers is an effective design strategy for the development of high-performance polymer acceptors.

关 键 词：全聚合物太阳电池 聚合物受体 苯并三氮唑 聚合位点 

分 类 号：O631.1[理学—高分子化学]