All-Small-Molecule Organic Solar Cells with an Ordered Liquid Crystalline Donor

被引：329

作者：

Chen, Haiyan ^{[1
,2
]}

Hu, Dingqin ^{[1
]}

Yang, Qianguang ^{[1
]}

Gao, Jie ^{[1
]}

Fu, Jiehao ^{[1
,2
]}

Yang, Ke ^{[1
,2
]}

He, Hao ^{[4
]}

Chen, Shanshan ^{[2
,3
]}

Kan, Zhipeng ^{[1
]}

Duan, Tainan ^{[1
]}

Yang, Changduk ^{[3
]}

Ouyang, Jianyong ^{[4
]}

Xiao, Zeyun ^{[1
]}

Sun, Kuan ^{[2
]}

Lu, Shirong ^{[1
]}

机构：

[1] Univ Chinese Acad Sci UCAS Chongqing, Chinese Acad Sci, Organ Semicond Res Ctr, Chongqing Inst Green & Intelligent Technol,Chongq, Chongqing 400714, Peoples R China

[2] Chongqing Univ, Sch Power Engn, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China

[3] Ulsan Natl Inst Sci & Technol, Dept Energy Engn, Sch Energy & Chem Engn, Perovtron Res Ctr,Low Dimens Carbon Mat Ctr, 50 UNIST Gil, Ulsan 44919, South Korea

[4] Natl Univ Singapore, Dept Mat Sci & Engn, 7 Engn Dr 1, Singapore 117574, Singapore

来源：

JOULE | 2019年 / 3卷 / 12期

基金：

中国国家自然科学基金;

关键词：

FULLERENE; POLYMERS; HALOGENATION; MORPHOLOGY;

D O I：

10.1016/j.joule.2019.09.009

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：

The crystallinity and intermolecular interaction among small molecules are enhanced in order to achieve reasonable phase segregation between the donor and acceptor in all-small-molecule organic solar cells (ASM OSCs). By substituting an alkyl side chain with a chlorine (CI) atom on the original benzodithiophene terthiophene rhodanine (BTR) molecule, the new small molecular donor, namely BTR-CI, processes a more ordered liquid crystalline property, down-shifted molecular energy levels, and higher crystallinity, When blended with a non-fullerene acceptor Y6, which has a complementary absorption profile and well-matched energy levels but no liquid crystalline property, a prominent phase separation and optimal film morphology are obtained. As a result, a record-high power conversion efficiency (PCE) of 13.6% is achieved, taking a large step forward in ASM OSCs. Our results highlight the importance of crystallinity to phase separation, suggesting the great promise of liquid crystalline materials in OSCs.

引用

页码：3034 / 3047

页数：14

共 37 条

[1] Morphology of a thermally stable small molecule OPV blend comprising a liquid crystalline donor and fullerene acceptor [J].