Side Chain Engineering of Naphthalene Diimide-Bithiophene-Based Polymer Acceptors in All-Polymer Solar Cells

被引：10

作者：

Wu, Xia ^{[1
,2
,3
]}

Tang, Yumin ^{[3
]}

Wang, Yuxi ^{[3
]}

Liu, Xiaoyuan ^{[1
,2
]}

Liu, Changmei ^{[1
,2
]}

Zhang, Xiaonan ^{[4
]}

Yang, Yingguo ^{[4
]}

Gao, Xingyu ^{[4
]}

Chen, Fei ^{[1
,2
]}

Guo, Xugang ^{[3
]}

Chen, Zhi-Kuan ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ, Natl Jiangsu Synerget Innovat Ctr Adv Mat, Key Lab Flexible Elect KLOFE, Nanjing 211816, Jiangsu, Peoples R China

[2] Nanjing Tech Univ, Natl Jiangsu Synerget Innovat Ctr Adv Mat, IAM, Nanjing 211816, Jiangsu, Peoples R China

[3] South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

[4] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Pudong, New Area Shangh, Peoples R China

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2017年 / 55卷 / 22期

基金：

中国国家自然科学基金;

关键词：

conjugated polymers; interpenetrating networks (IPN); morphology; naphthalene diimide; non-fullerene acceptor; polymer solar cell; POWER CONVERSION EFFICIENCY; HIGH-PERFORMANCE; ORGANIC ELECTRONICS; THERMAL-STABILITY; PERYLENE DIIMIDES; ADDITIVE-FREE; DONOR; COPOLYMER; SEMICONDUCTORS; MORPHOLOGY;

D O I：

10.1002/pola.28753

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two novel polymeric acceptors based on naphthalene diimide (NDI) and 2.2'-bithiophene, named as P(NDI2THD-T2) and P(NDI2TOD-T2), were designed and synthesized for all polymer solar cells application. The structural and electronic properties of the two acceptors were modulated through side-chain engineering of the NDI units. The optoelectronic properties of the polymers and the morphologies of the blend films composed of the polymer acceptors and a donor polymer PTB7-Th were systemically investigated. With thiophene groups introduced into the side chains of the NDI units, both polymers showed wider absorption from 350 nm to 900 nm, compared with the reference polymer acceptor of N2200. No redshift of absorption spectra from solutions to films indicated reduced aggregation of the polymers due to the steric hindrance effect of thiophene rings in the side chains. The photovoltaic performance were characterized for devices in a configuration of ITO/PEDOT:PSS/PTB7-Th:acceptors/2,9-bis(3-(dimethylamino)propyl)anthra[2,1,9-def:6,5,10-def]diisoquinoline-1,3,8,10(2H,9H)-tetraone (PDIN)/Al. With the addition of diphenyl ether as an additive, the power conversion efficiencies (PCEs) of 2.73% and 4.75% for P(NDI2THD-T2) and P(NDI2TOD-T2) based devices were achieved, respectively. The latter showed improved J(sc), Fill Factor (FF), and PCE compared with N2200 based devices. (C) 2017 Wiley Periodicals, Inc.

引用

页码：3679 / 3689

页数：11

共 52 条

[1] Design of New Electron Acceptor Materials for Organic Photovoltaics: Synthesis, Electron Transport, Photophysics, and Photovoltaic Properties of Oligothiophene-Functionalized Naphthalene Diimides [J].