Nonfullerene Acceptor for Organic Solar Cells with Chlorination on Dithieno[3,2-b:2′,3′-d]pyrrol Fused-Ring

被引：105
|
作者：
Geng, Renyong [1 ]
Song, Xin [2 ]
Feng, Haohao [1 ]
Yu, Jiangsheng [3 ]
Zhang, Ming [4 ]
Gasparini, Nicola [2 ]
Zhang, Zhuohan [1 ]
Liu, Feng [4 ]
Baran, Derya [2 ]
Tang, Weihua [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China
[2] KAUST, KAUST Solar Ctr KSC, Thuwal 239556900, Saudi Arabia
[3] Nanjing Univ Sci & Technol, MIIT Key Lab Adv Solid Laser, Nanjing 210094, Jiangsu, Peoples R China
[4] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA, Dept Phys & Astron, Shanghai 200240, Peoples R China
来源：
ACS ENERGY LETTERS | 2019年 / 4卷 / 03期
基金：
中国国家自然科学基金;
关键词：
NON-FULLERENE ACCEPTOR; ENERGY-LEVEL; POLYMER; EFFICIENCY; PERFORMANCE; MORPHOLOGY;
D O I：
10.1021/acsenergylett.9b00147
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A narrow-band-gap molecular acceptor, IPIC-4Cl, featuring an indacenobis(dithieno[3,2-b:2',3'-d]pyrrol) (INP) core with 2-butyl-1-octyl side chains and chlorinated (dicyanomethylidene)-indan-1-one (IC) as electron-accepting end group, has been rationally designed as nonfullerene acceptors (NFAs) for organic solar cells (OSCs). The impact of chlorination on the acceptor unit is revealed by a comparison study with two counterpart NFAs bearing a fluorinated or nonhalogenated IC unit. The synergetic photophysical and morphological analyses reveal that PBDB-T:IPIC-4Cl blend possesses efficient exciton dissociation and charge collection integrated with higher crystallinity and optimized phase separation. Consequently, the OSCs constructed by PBDB-T:IPIC-4Cl obtain a champion power conversion efficiency (PCE) of 13.4% with an extremely low energy loss of 0.51 eV. More encouragingly, we achieve a higher photovoltaic performance of 14.3% for ternary solar cells by combining an optimal amount of PC71BM with PBDB-T:IPIC-4Cl blend.
引用
收藏
页码：763 / 770
页数：15
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