A Non-Fullerene Acceptor with Chlorinated Thienyl Conjugated Side Chains for High-Performance Polymer Solar Cells via Toluene Processing

被引：23
作者：
Li, Guangwei [1 ]
Wu, Jingnan [1 ]
Fang, Jin [1 ]
Guo, Xia [1 ,2 ,3 ]
Zhu, Lei [2 ,3 ]
Liu, Feng [2 ,3 ]
Zhang, Maojie [1 ]
Li, Yongfang [1 ,4 ]
机构：
[1] Soochow Univ, Lab Adv Optoelect Mat, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Jiangsu, Peoples R China
[2] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, CICIFSA, Shanghai 200240, Peoples R China
[4] Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
来源：
CHINESE JOURNAL OF CHEMISTRY | 2020年 / 38卷 / 07期
基金：
中国国家自然科学基金;
关键词：
SUBSTITUTED 2D-CONJUGATED POLYMER; SMALL-MOLECULE ACCEPTOR; ELECTRON-ACCEPTOR; EFFICIENT; POLYTHIOPHENE; TRANSPORT; DESIGN;
D O I：
10.1002/cjoc.201900495
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
of main observation and conclusion Small molecular acceptors (SMAs) BTC-2F and BTH-2F, based on heptacyclic benzodi(cyclopentadithiophene) electron-donating core (CBT) with chlorinated-thienyl conjugated and thienyl conjugated side chains, respectively, are designed and synthesized. Compared with non-chlorine acceptor BTH-2F, BTC-2F exhibits slightly blue-shifted absorption spectra, similar the lowest unoccupied molecular orbital (LUMO) (-3.91 eV), deeper highest occupied molecular orbital (HOMO) energy level and higher electron mobility than that of BTH-2F. PM6, a wide bandgap polymer, is selected as the donor material to construct bulk heterojunction polymer solar cells processed with nonhalogenated solvent toluene. The optimized PM6:BTC-2F-based device presents a 12.9% power conversion efficiency (PCE), while the PCE of PM6:BTH-2F-based device is only 11.3%. The results suggest that it is an effective strategy to optimize the photoelectric properties of SMAs by incorporating chlorine atom into the conjugated side chains.
引用
收藏
页码：697 / 702
页数：6
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