Fused Nonacyclic Electron Acceptors for Efficient Polymer Solar Cells

被引：833

作者：

Dai, Shuixing ^{[1
,2
]}

Zhao, Fuwen ^{[3
]}

Zhang, Qianqian ^{[4
]}

Lau, Tsz-Ki ^{[5
]}

Li, Tengfei ^{[1
]}

Liu, Kuan ^{[1
]}

Ling, Qidan ^{[2
]}

Wang, Chunru ^{[3
]}

Lu, Xinhui ^{[5
]}

You, Wei ^{[4
]}

Zhan, Xiaowei ^{[1
]}

机构：

[1] Peking Univ, Dept Mat Sci & Engn, Key Lab Polymer Chem & Phys, Coll Engn,Minist Educ, Beijing 100871, Peoples R China

[2] Fujian Normal Univ, Coll Mat Sci & Engn, Fujian Key Lab Polymer Mat, Fuzhou 350007, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China

[4] Univ North Carolina Chapel Hill, Dept Chem, Chapel Hill, NC 27599 USA

[5] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2017年 / 139卷 / 03期

关键词：

POWER CONVERSION EFFICIENCY; FIELD-EFFECT TRANSISTORS; SMALL-MOLECULE ACCEPTOR; NON-FULLERENE-ACCEPTOR; ORGANIC PHOTOVOLTAICS; 3D STRUCTURE; PERFORMANCE; DONOR; DESIGN; DERIVATIVES;

D O I：

10.1021/jacs.6b12755

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We design and synthesize four fused-ring electron acceptors based on-6,6,12,12-tetrakis(4-hexylphenyl)-indacenobis(dithieno[3,2-b-2',3'-d]thiophene) as the electron-rich unit and 1,1-dicyanomethylene-3-indanones with 0-2 fluorine substituents as the electron-deficient units. These four molecules exhibit broad (550-850 nm) and strong absorption with high extinction coefficients of (2.1-2.5) x 10(5) M-1 cm(-1). Fluorine substitution downshifts the LUMO energy level, red-shifts the absorption spectrum, and enhances electron mobility. The polymer solar cells based on the fluorinated electron acceptors exhibit power conversion efficiencies as high as 11.5%, much higher than that of their nonfluorinated counterpart (7.7%). We investigate the effects of the fluorine atom number and position on electronic properties, charge transport, film morphology, and photovoltaic properties.

引用

页码：1336 / 1343

页数：8

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