Medium-Bandgap Small-Molecule Donors Compatible with Both Fullerene and Nonfullerene Acceptors

被引：24

作者：

Huo, Yong ^{[1
]}

Yan, Cenqi ^{[4
]}

Kan, Bin ^{[5
,6
]}

Liu, Xiao-Fei ^{[1
]}

Chen, Li-Chuan ^{[1
]}

Hu, Chen-Xia ^{[1
]}

Lau, Tsz-Ki ^{[7
]}

Lu, Xinhui ^{[7
]}

Sun, Chun-Lin ^{[1
]}

Shao, Xiangfeng ^{[1
]}

Chen, Yongsheng ^{[5
,6
]}

Zhan, Xiaowei ^{[4
]}

Zhang, Hao-Li ^{[1
,2
,3
]}

机构：

[1] Lanzhou Univ, Coll Chem & Chem Engn, Key Lab Special Funct Mat & Struct Design, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China

[2] Tianjin Univ, Dept Chem, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300072, Peoples R China

[3] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China

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

[5] Nankai Univ, Coll Chem, Inst Polymer Chem, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China

[6] Nankai Univ, Coll Chem, Inst Polymer Chem, Ctr Nanoscale Sci & Technol, Tianjin 300071, Peoples R China

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

来源：

ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 11期

基金：

中国国家自然科学基金;

关键词：

small-molecule donor; fused-ring electron acceptor; compatibility; fullerene organic solar cell; nonfullerene organic solar cell; ORGANIC SOLAR-CELLS; RING ELECTRON-ACCEPTOR; HIGH-EFFICIENCY; SIDE-CHAIN; 13-PERCENT EFFICIENCY; BENZODITHIOPHENE UNIT; 2D-CONJUGATED POLYMER; CONJUGATED POLYMERS; PHOTOVOLTAIC CELLS; DESIGN;

D O I：

10.1021/acsami.7b17961

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Much effort has been devoted to the development of new donor materials for small-molecule organic solar cells due to their inherent advantages of well-defined molecular weight, easy purification, and good reproducibility in photovoltaic performance. Herein, we report two small-molecule donors that are compatible with both fullerene and nonfullerene acceptors. Both molecules consist of an (E)-1,2-di(thiophen-2-ypethane-substituted (TVT-substituted) benzo[1,2-b:4,5-b]dithiophene (BDT) as the central unit, and two rhodanine units as the terminal electron-withdrawing groups. The central units are modified with either alkyl side chains (DRBDT-TVT) or alkylthio side chains (DRBDT-STVT). Both molecules exhibit a medium bandgap with complementary absorption and proper energy level offset with typical acceptors like PC71BM and IDIC. The optimized devices show a decent power conversion efficiency (PCE) of 6.87% for small-molecule organic solar cells and 6.63% for nonfullerene all small-molecule organic solar cells. Our results reveal that rationally designed medium-bandgap small-molecule donors can be applied in high-performance small-molecule organic solar cells with different types of acceptors.

引用

页码：9587 / 9594

页数：8

共 68 条

[1] A High-Performance D-A Copolymer Based on Dithieno[3,2-b:2′,3′-d]Pyridin-5(4H)-One Unit Compatible with Fullerene and Nonfullerene Acceptors in Solar Cells [J].