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

被引:93
作者
An, Mingwei [1 ,2 ]
Xie, Fangyuan [2 ,3 ]
Geng, Xinjian [2 ]
Zhang, Jianqi [2 ]
Jiang, Jiaxing [3 ]
Lei, Zhongli [1 ]
He, Dan [2 ]
Xiao, Zuo [2 ]
Ding, Liming [2 ]
机构
[1] Shaanxi Normal Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710062, Peoples R China
[2] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China
[3] Shaanxi Normal Univ, Sch Mat Sci & Engn, Xian 710062, Peoples R China
基金
中国国家自然科学基金;
关键词
EFFICIENT FULLERENE; PHOTOVOLTAIC PERFORMANCE; ORGANIC PHOTOVOLTAICS; BUILDING-BLOCK; POLYMER; DESIGN; LAYER;
D O I
10.1002/aenm.201602509
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
Development of high-performance donor-acceptor (D-A) copolymers is vital in the research of polymer solar cells (PSCs). In this work, a low-bandgap D-A copolymer based on dithieno[3,2-b:2',3'-d]pyridin-5(4H)-one unit (DTP), PDTP4TFBT, is developed and used as the donor material for PSCs with PC71BM or ITIC as the acceptor. PDTP4TFBT:PC71BM and PDTP4TFBT: ITIC solar cells give power conversion efficiencies (PCEs) up to 8.75% and 7.58%, respectively. 1,8-Diiodooctane affects film morphology and device performance for fullerene and nonfullerene solar cells. It inhibits the active materials from forming large domains and improves PCE for PDTP4TFBT:PC71BM cells, while it promotes the aggregation and deteriorates performance for PDTP4TFBT:ITIC cells. The ternary-blend cells based on PDTP4TFBT:PC71BM: ITIC (1:1.2:0.3) give a decent PCE of 9.20%.
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页数:6
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