A Non-fullerene Acceptor with Enhanced Intermolecular π-Core Interaction for High-Performance Organic Solar Cells

被引：296

作者：

Lin, Francis ^{[1
,2
]}

Jiang, Kui ^{[3
]}

Kaminsky, Werner ^{[2
]}

Zhu, Zonglong ^{[1
]}

Jen, Alex K-Y ^{[1
,2
,3
,4
]}

机构：

[1] City Univ Hong Kong, Dept Chem, Kowloon, Hong Kong 999077, Peoples R China

[2] Univ Washington, Dept Chem, Seattle, WA 98195 USA

[3] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Hong Kong 999077, Peoples R China

[4] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2020年 / 142卷 / 36期

关键词：

ELECTRON-ACCEPTOR; MOIETIES SYNTHESIS; TRANSPORT; POLYMERS; MOBILITY; DESIGN;

D O I：

10.1021/jacs.0c07083

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Understanding the molecular structure and self-assembly of thiadiazole-derived non-fullerene acceptors (NFAs) is very critical for elucidating the origin of their extraordinary charge generation and transport properties that enable high power conversion efficiencies to be achieved in these systems. A comprehensive crystallographic study on a state-of-the-art NFA, Y6, and its selenium analog, CH1007, has been conducted which revealed that the face-to-face pi-core interaction induced by benzo[2,1,3]thiadiazole S-N-containing moieties plays a significant role in governing the molecular geometries and unique packing of Y6 and CH1007 to ensure their superior charge-transport properties. Moreover, benefitting from the red-shifted optical absorption via selenium substitution, photovoltaic devices based on a PM6:CH1007:PC71BM ternary blend delivered an exceptionally high short-circuit current of 27.48 mA/cm(2) and a power conversion efficiency of 17.08%.

引用

页码：15246 / 15251

页数：6

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