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

页码：1760 / 1768

页数：9

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