Medium Bandgap Polymer Donor Based on Bi(trialkylsilylthienyl-benzo[1,2-b:4,5-b′]-difuran) for High Performance Nonfullerene Polymer Solar Cells

被引：72

作者：

Bin, Haijun ^{[1
,2
]}

Zhong, Lian ^{[1
,2
]}

Yang, Yankang ^{[1
,2
]}

Gao, Liang ^{[1
,2
]}

Huang, He ^{[1
,2
]}

Sun, Chenkai ^{[1
,2
]}

Li, Xiaojun ^{[1
,2
]}

Xue, Lingwei ^{[1
]}

Zhang, Zhi-Guo ^{[1
]}

Zhang, Zhanjun ^{[2
]}

Li, Yongfang ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China

[3] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Lab Adv Optoelect Mat, Suzhou 215123, Jiangsu, Peoples R China

来源：

ADVANCED ENERGY MATERIALS | 2017年 / 7卷 / 20期

关键词：

benzodifuran-based D-A copolymers; conjugated polymers; m-ITIC; nonfullerene polymer solar cells; POWER CONVERSION EFFICIENCY; ENERGY-LEVEL MODULATION; CONJUGATED POLYMER; ELECTRON-ACCEPTORS; SUBSTITUTED BENZODITHIOPHENE; MOLECULAR DESIGN; FULLERENE; COPOLYMER; GAP;

D O I：

10.1002/aenm.201700746

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new 2D-conjugated medium bandgap donor-acceptor copolymer, J81, based on benzodifuran with trialkylsilyl thiophene side chains as donor unit and fluorobenzothiazole as acceptor, is synthesized and successfully used in nonfullerene polymer solar cells (PSCs) with low bandgap n-type organic semiconductor (n-OS) 3,w-bis(2-methylene-(3-(1,1-dicyanomethylene)indanone)-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2',3'-d']-s-ndaceno[1,2-b:5,6-b']- dithiophene (ITIC) and m-ITIC as acceptor. J81 possesses a lower-lying highest occupied molecular orbital (HOMO) energy level of -5.43 eV and medium bandgap of 1.93 eV with complementary absorption in the visible-near infrared region with the n-OS acceptor. The PSCs based on J81: ITIC and J81: m-ITIC yield high power conversion efficiency of 10.60% and 11.05%, respectively, with high V-oc of 0.95-0.96 V benefit from the lower-lying HOMO energy level of J81 donor. The work indicates that J81 is another promising polymer donor for the nonfullerene PSCs.

引用

页数：7

共 34 条

[21] Molecular Design of Photovoltaic Materials for Polymer Solar Cells: Toward Suitable Electronic Energy Levels and Broad Absorption [J].