Structure Evolution of Oligomer Fused-Ring Electron Acceptors toward High Efficiency of As-Cast Polymer Solar Cells

被引:150
作者
Lin, Yuze [1 ,2 ]
Li, Tengfei [1 ]
Zhao, Fuwen [3 ]
Han, Lei [1 ]
Wang, Zaiyu [4 ]
Wu, Yang [4 ]
He, Qiao [1 ]
Wang, Jiayu [1 ]
Huo, Lijun [5 ]
Sun, Yanming [5 ]
Wang, Chunru [3 ]
Ma, Wei [4 ]
Zhan, Xiaowei [1 ]
机构
[1] Peking Univ, Coll Engn, Minist Educ, Dept Mat Sci & Engn,Key Lab Polymer Chem & Phys, Beijing 100871, Peoples R China
[2] Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
[3] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
[4] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[5] Beihang Univ, Sch Chem & Environm, Heeger Beijing Res & Dev Ctr, Beijing 100191, Peoples R China
关键词
POWER CONVERSION EFFICIENCY; HIGH-PERFORMANCE; ORGANIC PHOTOVOLTAICS; NONFULLERENE ACCEPTORS; BANDGAP POLYMER; 3D STRUCTURE; DONOR; ABSORPTION; FULLERENES; PAIR;
D O I
10.1002/aenm.201600854
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
The structure evolution of oligomer fused-ring electron acceptors (FREAs) toward high efficiency of as-cast polymer solar cells (PSCs) is reported. First, a series of FREAs (IC-(1-3)IDT-IC) based on indacenodithiophene (IDT) oligomers as cores are designed and synthesized, effects of IDT number (1-3) on their basic optical and electronic properties are investigated, and more importantly, the relationship between device performance of as-cast PSCs and donor(D)/acceptor(A) matching (absorption, energy level, morphology, and charge transport) of IC-(1-3) IDT-IC acceptors and two representative polymer donors, PTB7-Th and PDBT-T1 is surveyed. Then, the most promising D/A system (PDBT-T1/IC-1IDT-IC) with the best D/A harmony among the six D/A combinations, which yields a power conversion efficiency (PCE) of 7.39%, is found. Finally, changing the side-chains in IC-1IDT-IC from alkylphenyl to alkyl enhances the PCE from 7.39% to 9.20%.
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页数:9
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