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
2017; Wiley; Volume: 7; Issue: 14 Linguagem: Inglês
10.1002/aenm.201602509
ISSN1614-6840
AutoresMingwei An, Fangyuan Xie, Xinjian Geng, Jianqi Zhang, Jia‐Xing Jiang, Zhongli Lei, Dan He, Zuo Xiao, Liming Ding,
Tópico(s)Perovskite Materials and Applications
ResumoDevelopment 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 PC 71 BM or ITIC as the acceptor. PDTP4TFBT:PC 71 BM 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:PC 71 BM cells, while it promotes the aggregation and deteriorates performance for PDTP4TFBT:ITIC cells. The ternary‐blend cells based on PDTP4TFBT:PC 71 BM:ITIC (1:1.2:0.3) give a decent PCE of 9.20%.
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