Use of two structurally similar small molecular acceptors enabling ternary organic solar cells with high efficiencies and fill factors

被引：272

作者：

Liu, Tao ^{[1
,2
,3
]}

Luo, Zhenghui ^{[4
]}

Fan, Qunping ^{[5
]}

Zhang, Guangye ^{[1
,2
,3
]}

Zhang, Lin ^{[6
]}

Gao, Wei ^{[4
]}

Guo, Xia ^{[5
]}

Ma, Wei ^{[6
]}

Zhang, Maojie ^{[5
]}

Yang, Chuluo ^{[4
]}

Li, Yongfang ^{[5
]}

Yan, He ^{[1
,2
,3
,7
]}

机构：

[1] HKUST Shenzhen Res Inst, 9 Yuexing 1st RD,Hitech Pk, Shenzhen 518057, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China

[3] Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Tissue Restorat & Recon, Hong Kong Branch, Kowloon, Hong Kong, Peoples R China

[4] Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China

[5] Soochow Univ, Lab Adv Optoelect Mat, State & Local Joint Engn Lab Novel Funct Polymer, Suzhou 215123, Peoples R China

[6] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[7] EFlexPV Ltd, Jinxiu Sci Pk, Shenzhen, Guangdong, Peoples R China

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2018年 / 11卷 / 11期

基金：

中国国家自然科学基金;

关键词：

OPEN-CIRCUIT VOLTAGE; ENERGY-LEVEL MODULATION; RING ELECTRON-ACCEPTOR; 13-PERCENT EFFICIENCY; POLYMER; PERFORMANCE; BISADDUCT; BLENDS; LEADS;

D O I：

10.1039/c8ee01700j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ternary blends have shown great potential to increase the power conversion efficiency (PCE) of organic solar cells (OSCs). In this work, we studied a ternary OSC system with a donor polymer (PM6) and two structurally similar non-fullerene acceptors (named ITCPTC and MeIC). Although these two small molecular acceptors (SMAs) exhibit similar absorption spectra, they introduce a surprising synergistic effect on tuning the domain size and crystallinity of the OSC blend. More specifically, MeIC is a SMA with strong crystallinity, which results in excessive phase segregation and large domain size for the PM6:MeIC binary blend. By adding a structurally similar and less crystalline SMA (ITCPTC) into the binary blend, the domain size and morphology of the blend are much improved without sacrificing the electron mobility of the blend. As a result, the optimal blend ratio of PM6:ITCPTC:MeIC (1:0.4:0.6) led to an impressive FF of 78.2% and PCE of 14.13%, which are the highest values reported for ternary non-fullerene OSCs reported to date.

引用

页码：3275 / 3282

页数：8

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