Alkyl Chain Engineering of Bithiophene Imide-based Polymer Donor for Organic Solar Cells

被引：1
作者：
Bai Yuanqing [1 ]
Zhang Jiabin [1 ]
Liu Chunchen [1 ]
Hu Zhicheng [1 ]
Zhang Kai [1 ]
Huang Fei [1 ]
机构：
[1] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat Devices, Guangzhou 510640, Peoples R China
来源：
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2023年 / 44卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Organic solar cell; Polymer donor; Bithiophene imide; Alkyl chain engineering; RECOMBINATION;
D O I：
10.7503/cjcu20230271
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two polymer donor materials, namely pBDT-BTI-EH and pBDT-BTI-ME, were synthesized by copoly. merizing benzodithiophene (BDT) unit with bithiophene imide (BTI) unit containing 2-ethylhexyl and methyl alkyl side chains, respectively. Compared to pBDT-BTI-EH:Y6 based organic solar cells (OSCs), the pBDT-BTI-ME:Y6-based device exhibited higher charge mobilities, reduced charge recombination, more efficient exciton dissociation, and favorable film morphology, which leaded to increased short current density (J(sc)), fill factor (FF) and thus a significant improvement in power conversion efficiency (PCE) from 9.31% to 15.69%.
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页数：11
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