物理化学学报2017，Vol.33Issue(8)：1635-1643,9.DOI:10.3866/PKU.WHXB201704244
新型基于二氟苯并噻二唑和双噻吩丙烯腈共轭聚合物的设计、合成及光伏性能
Design, Synthesis and Photovoltaic Performance of Novel Conjugated Polymers Based on Difluorobenzothiadiazole and 2,3-Bis[thiophen-2-yl]acrylonitrile
摘要
Abstract
In this study,two novel difluorobenzothiadiazole (DFBT)-based polymeric donors,poly[(5,6-difluoro-benzo[c][1,2,5]thiadiazol-4,7-yl)-alt-((E)-2,3-bis(3＇-(2-octyldodecyl)-(2,2＇-bithiophen)-5,5＇ -yl) acrylonitrile)] (DFBT812) and poly[(5,6-difluoro-benzo[c][1,2,5]thiadiazol-4,7-yl)-alt-((E)-2,3-bis(3＇-(2-decyltetradecyl)-(2,2＇-bithiophen)-5,5＇-yl) acrylonitdle)] (DFBT1014),possessing 2-octyldodecyl and 2-decyltetradecyl side chains,respectively,were designed,synthesized,and applied for polymer solar cells.Alkyl chains of 2-octyldodecyl and 2-decyltetradecyl were incorporated into the polymer to tune the solubility and crystallization of the polymers and morphology of the blend films.Morphological study showed that the blend film of DFBT812 with PC61BM presented much better phase separation domain,which is beneficial for charge transport and collection of charge carders in the blend film.Photovoltaic devices based on DFBT812 exhibited a power conversion efficiency (PCE) of 6.25％,outperforming those based on DFBT1014.Moreover,DFBT812-based photovoltaic devices exhibited a PCE over 6％ even when the thickness of the active layer was 220 nm.关键词
二氟苯并噻二唑/双噻吩丙烯腈/侧链工程/聚合物给体/聚合物太阳电池Key words
Difluorobenzothiadiazole/2,3-Bis[thiophen-2-yl]acrylonitrile/Side chain engineering/Polymer donor/Polymer solar cells分类
化学化工引用本文复制引用
郑江波,陈智明,胡志诚,张杰,黄飞..新型基于二氟苯并噻二唑和双噻吩丙烯腈共轭聚合物的设计、合成及光伏性能[J].物理化学学报,2017,33(8):1635-1643,9.基金项目
The project was supported by the National Natural Science Foundation of China (51403070,21520102006).国家自然科学基金(51403070,21520102006)资助项目 （51403070,21520102006）
