Asymmetrical Small Molecule Acceptor Enabling Nonfullerene Polymer Solar Cell with Fill Factor Approaching 79%

被引:114
作者
Gao, Wei [1 ,2 ,3 ]
Liu, Tao [4 ,5 ]
Zhong, Cheng [1 ,2 ]
Zhang, Guangye [4 ,5 ]
Zhang, Yunpeng [7 ]
Ming, Ruijie [1 ,2 ]
Zhang, Lin [6 ]
Xin, Jingming [6 ]
Wu, Kailong [1 ,2 ]
Guo, Yunlong [7 ]
Ma, Wei [6 ]
Yan, He [4 ,5 ]
Liu, Yunqi [7 ]
Yang, Chuluo [1 ,2 ,3 ]
机构
[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
[3] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China
[4] Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Dept Chem, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
[5] Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Hong Kong Branch, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
[6] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[7] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
来源
ACS ENERGY LETTERS | 2018年 / 3卷 / 07期
基金
中国国家自然科学基金;
关键词
POWER CONVERSION EFFICIENCY; 13-PERCENT EFFICIENCY; ORGANIC PHOTOVOLTAICS; ELECTRON-ACCEPTORS; DESIGN; GAP;
D O I
10.1021/acsenergylett.8b00825
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
Relative to the increase of open-circuit voltage and short-circuit current, promoting fill factor (FF) of the polymer solar cells (PSCs) seems to be more challenging. Here, we designed and synthesized two asymmetrical small molecule acceptors (IDT6CN-M and IDT8CN-M) with large dipole moments. We find that the strong intermolecular interaction and favorable antiparallel packing induced by the dipole moment can effectively enhance both lamellar packing and p-p stacking. The PSCs based on PBDB-T:IDT6CN-M and PBDB-T:IDT8CN-M achieved FFs of up to 76.1% and 78.9%, corresponding to PCEs of 11.23% and 12.43%, respectively. To the best of our knowledge, 78.9% FF is a new record for nonfullerene PSCs. Overall, our work provides a simple and effective molecule-designing method to promote FF of nonfullerene PSCs.
引用
收藏
页码:1760 / 1768
页数:9
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