Highly Efficient Organic Solar Cells Based on S,N-Heteroacene Non-Fullerene Acceptors

被引：206

作者：

Huang, Chuyi ^{[1
,2
]}

Liao, Xunfan ^{[1
,3
]}

Gao, Ke ^{[1
]}

Zuo, Lijian ^{[1
]}

Lin, Francis ^{[5
]}

Shi, Xueliang ^{[1
]}

Li, Chang-Zhi ^{[2
]}

Liu, Hongbin ^{[5
]}

Li, Xiaosong ^{[5
]}

Liu, Feng ^{[4
]}

Chen, Yiwang ^{[3
]}

Chen, Hongzheng ^{[2
]}

Jen, Alex K-Y. ^{[1
,2
,5
,6
]}

机构：

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

[2] Zhejiang Univ, MOE Key Lab Macromol Synth & Functionalizat, State Key Lab Silicon Mat, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

[3] Nanchang Univ, Inst Polymers, Dept Chem, Nanchang 330031, Jiangxi, Peoples R China

[4] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China

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

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

来源：

CHEMISTRY OF MATERIALS | 2018年 / 30卷 / 15期

基金：

中国国家自然科学基金;

关键词：

RING ELECTRON-ACCEPTOR; LOW ENERGY-LOSSES; SMALL-MOLECULE; CONJUGATED POLYMERS; PHASE-SEPARATION; BAND-GAP; DESIGN; PHOTOVOLTAICS;

D O I：

10.1021/acs.chemmater.8b02276

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：

Two novel non-fullerene acceptors, SN6IC and SN6IC-4F, based on an S,N-heteroacene backbone were designed and synthesized. The cyclopentadiene fragments of commonly used acceptors were replaced with pyrrole rings to improve the electron-donating ability to increase the energy levels of the molecules. Both acceptors match well with the absorption and energy levels of the polymer donor PBDB-T, and PBDB-T:SN6IC-4F-based solar cells showed an excellent power conversion efficiency of 13.2%, with a relatively small V-OC loss of 0.54 eV. This study proves that the introduction of a nitrogen atom to replace the sp(3)-hybridized carbon in the fused ring is very effective for making highly efficient NFAs to further improve the performance of organic solar cells.

引用

页码：5429 / 5434

页数：6

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