The effect of end-capping groups in A-D-A type non-fullerene acceptors on device performance of organic solar cells

被引：31

作者：

Jia, Jianchao ^{[1
]}

Zheng, Nannan ^{[1
]}

Wang, Zhenfeng ^{[1
]}

Huang, Yunping ^{[1
]}

Duan, Chunhui ^{[1
]}

Huang, Fei ^{[1
]}

Cao, Yong ^{[1
]}

机构：

[1] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

来源：

SCIENCE CHINA-CHEMISTRY | 2017年 / 60卷 / 11期

基金：

中国国家自然科学基金;

关键词：

organic solar cells; bulk-heterojunction; non-fullerene acceptors; end-capping groups; POWER CONVERSION EFFICIENCY; SMALL-MOLECULE ACCEPTORS; OPEN-CIRCUIT VOLTAGE; ELECTRON-ACCEPTOR; CONJUGATED POLYMERS; PERYLENE DIIMIDES; DESIGN; PHOTOVOLTAICS; DONOR; AGGREGATION;

D O I：

10.1007/s11426-017-9102-1

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of novel wide bandgap small molecules (IFT-ECA, IFT-M, IFT-TH and IFT-IC) based on the A-D-A structure with indenofluorene core, thiophene bridge, and different electron-deficient end-capping groups, were synthesized and used as non-fullerene acceptors in organic solar cells. The influences of end-capping groups on the device performance were studied. The four materials exhibited different physical and chemical properties due to the variation of end-capping groups, which further affect the exciton dissociation, charge transport, morphology of the bulk-heterojunction films and device performance. Among them, IFT-IC-based device delivered the best power conversion efficiency of 7.16% due to proper nano-scale phase separation morphology and high electron mobility, while the devices based on the other acceptors achieved lower device performance (4.14% for IFT-TH, < 1% for IFT-ECA and IFT-M). Our results indicate the importance of choosing suitable electron-withdrawing groups to construct high-performance non-fullerene acceptors based on A-D-A motif.

引用

页码：1458 / 1467

页数：10

共 70 条

[51] Comparison among Perylene Diimide (PDI), Naphthalene Diimide (NDI), and Naphthodithiophene Diimide (NDTI) Based n-Type Polymers for All-Polymer Solar Cells Application [J].