An Electron Acceptor with Broad Visible-NIR Absorption and Unique Solid State Packing for As-Cast High Performance Binary Organic Solar Cells

被引：115

作者：

Shi, Xueliang ^{[1
]}

Liao, Xunfan ^{[1
,2
]}

Gao, Ke ^{[1
]}

Zuo, Lijian ^{[1
]}

Chen, Jingde ^{[1
]}

Zhao, Jingbo ^{[1
]}

Liu, Feng ^{[3
]}

Chen, Yiwang ^{[2
]}

Jen, Alex K-Y. ^{[1
,4
,5
]}

机构：

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

[2] Nanchang Univ, Coll Chem, Inst Polymers, Nanchang 330031, Jiangxi, Peoples R China

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

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

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

来源：

ADVANCED FUNCTIONAL MATERIALS | 2018年 / 28卷 / 33期

关键词：

near-infrared semiconductors; nonfullerene acceptors; organic solar cells; X-ray diffraction; NON-FULLERENE ACCEPTORS; LOW ENERGY-LOSSES; BAND-GAP; 13-PERCENT EFFICIENCY; PHASE-SEPARATION; POLYMER; DESIGN;

D O I：

10.1002/adfm.201802324

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel acceptor-donor-acceptor (A-D-A) type electron acceptor 6TIC-4F with terthieno[3,2-b]thiophene (6T) as the core unit is rationally designed and synthesized, which exhibits an extraordinarily narrow bandgap (approximate to 1.24 eV) and strong absorption between 650 and 1000 nm. X-ray crystallographic analysis reveals that it has unique intermolecular pi-pi stacking. The solar cells based on the as-cast poly[(2,6-(4,8-bis(5-(2-ethylhexyl) thiophen-2-yl)-benzo[1,2-b: 4,5-b'] dithiophene))-alt-(5,5-(1',3'-di-2-thienyl-5',7'-bis(2-ethylhexyl) benzo[1',2'c: 4',5'-c']dithiophene-4,8-dione))]) (PBDB-T): 6TIC-4F binary blends exhibit an excellent power conversion efficiency (PCE) of 11.14% with a high J(SC) of 23.00 mA cm(-2), and a high fill factor of 0.67, which represents one of the best PCE values for low bandgap (E-g < 1.3 eV)-based organic solar cells.

引用

页数：8

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