基于受体_(1)-受体_(2)型聚合物给体的高效有机太阳能电池  

Efficient Organic Solar Cells Based on Acceptor_(1)-acceptor_(2) Type Polymer Donor

作　　者：李浩 杨晨熠 李佳尧 张少青 侯剑辉[1,2] LI Hao;YANG Chenyi;LI Jiayao;ZHANG Shaoqing;HOU Jianhui(School of Chemistry and Biology Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Polymer Physics and Chemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]北京科技大学化学与生物工程学院,北京100083 [2]中国科学院化学研究所,高分子物理与化学国家重点实验室,北京100190

出　　处：《高等学校化学学报》2023年第9期88-96,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:22075017)资助。

摘　　要：设计合成了2种宽带隙聚合物给体,分别命名为PDTz-BDD和PDTz-BDT.其中, PDTz-BDT是一种典型的给-受体(D-A)型共轭聚合物, PDTz-BDD是具有受体_(1)-受体_(2)(A_(1)-A_(2))型结构的共轭聚合物.采用BTP-e C9作为受体,分别与PDTz-BDD和PDTz-BDT共混构建有机太阳能电池,系统研究了两种给体的光伏性能.研究结果表明,具有A_(1)-A_(2)型结构的PDTz-BDD表现出更强的光吸收能力、更明显的溶液聚集效应与更优良的器件形貌,相应的光伏电池可以实现更高的光电转换效率(10.36%).本文不仅设计合成了2种新型给体,而且为构建A_(1)-A_(2)型共聚物以开发高效聚合物给体提供了参考.In this work,we designed and synthesized two wide band-gap polymer donors:poly{1,3-bis(2-ethylhex⁃yl)-5-[5-(5'-methyl-4,4'-diundecyl-[2,2'-bithiazol]-5-yl)thiophen-2-yl]-7-(5-methylthiophen-2-yl)-4H,8H-benzo[1,2-c:4,5-c']dithiophene-4,8-dione}(PDTz-BDD)and poly(5-{4,8-bis[5-(2-ethylhexyl)thiophen-2-yl]-6-meth⁃ylbenzo[1,2-b:4,5-b']dithiophen-2-yl}-5'-methyl-4,4'-diundecyl-2,2'-bithiazole)(PDTz-BDT).PDTz-BDT is a typical donor-acceptor(D-A)type copolymer,whereas PDTz-BDD is an acceptor_(1)-acceptor_(2)(A_(1)-A_(2))type polymer.The photovoltaic properties of the two polymers were investigated by blending BTP-eC9 as the acceptor to construct organic solar cells,respectively.PDTz-BDD-based device achieves a higher power conversion efficiency of 10.36%due to its stronger light absorption ability,more obvious aggregation effect in solution and better morphological property of the blend film.This work not only demonstrates two novel donors,but also provides meaningful guidance for constructing A_(1)-A_(2) type copolymers to develop efficient polymer donors in the future.

关 键 词：聚合物给体 有机太阳能电池 光伏特性 受体_(1)-受体_(2)型结构 

分 类 号：O649[理学—物理化学]