Electron Acceptors Based on α-Substituted Perylene Diimide (PDI) for Organic Solar Cells

被引：204

作者：

Zhao, Donglin ^{[1
,2
]}

Wu, Qinghe ^{[1
,2
]}

Cai, Zhengxu ^{[1
,2
]}

Zheng, Tianyue ^{[1
,2
]}

Chen, Wei ^{[3
,4
]}

Lu, Jessica ^{[1
,2
]}

Yu, Luping ^{[1
,2
]}

机构：

[1] Univ Chicago, Dept Chem, 929 East 57th St, Chicago, IL 60637 USA

[2] Univ Chicago, James Franck Inst, 929 East 57th St, Chicago, IL 60637 USA

[3] Argonne Natl Lab, Div Mat Sci, 9700 Cass Ave, Lemont, IL 60439 USA

[4] Univ Chicago, Inst Mol Engn, 5747 South Ellis Ave, Chicago, IL 60637 USA

来源：

CHEMISTRY OF MATERIALS | 2016年 / 28卷 / 04期

基金：

美国国家科学基金会;

关键词：

POWER CONVERSION EFFICIENCY; NONFULLERENE ACCEPTORS; PYRENE DERIVATIVES; SMALL-MOLECULE; DONOR; GENERATION; FULLERENES; TRANSPORT; SINGLET; DESIGN;

D O I：

10.1021/acs.chemmater.5b04570

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：

Perylene diimide (PDI) derivatives functionalized at the ortho-position (alpha PPID, alpha PBDT) were synthesized and used as electron acceptors in non-fullerene organic photovoltaic cells. Because of the good planarity and strong pi-stacking of ortho-functionalized PDI, the alpha PPID and alpha PBDT exhibit a strong tendency to form aggregates, which endow the materials with high electron mobility. The inverted OPVs employing alpha PDI-based compounds as the acceptors and PBT7-Th as the donor give the highest power conversion efficiency (PCE) values: 4.92% for alpha PBDT-based devices and 3.61% for alpha PPID-based devices, which are, respectively, 39% and 4% higher than that of their beta-substituted counterparts beta PBDT and beta PPID. Charge separation studies show more efficient exciton dissociation at interfaces between alpha PDI-based compounds and PTB7-Th. The results suggest that alpha-substituted PDI derivatives are more promising electron acceptors for organic photovoltaic (OPV) components than beta-isomers.

引用

页码：1139 / 1146

页数：8

共 57 条

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