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Comparison Study of Wide Bandgap Polymer (PBDB-T) and Narrow Bandgap Polymer (PBDTTT-EFT) as Donor for Perylene Diimide Based Polymer Solar Cells
Ye, Tengling1; Jin, Shan1; Kang, Cong1; Tian, Changhao1; Zhang, Xin2; Zhan, Chuanlang2; Lu, Shirong3; Kan, Zhipeng3
2018-12-10
摘要Perylene diimide (PDI) derivatives as a kind of promising non-fullerene-based acceptor (NFA) have got rapid development. However, most of the relevant developmental work has focused on synthesizing novel PDI-based structures, and few paid attentions to the selection of the polymer donor in PDI-based solar cells. Wide bandgap polymer (PBDB-T) and narrow bandgap polymer (PBDTTT-EFT) are known as the most efficient polymer donors in polymer solar cells (PSCs). While PBDB-T is in favor with non-fullerene acceptors achieving power conversion efficiency (PCE) more than 12%, PBDTTT-EFT is one of the best electron donors with fullerene acceptors with PCE up to 10%. Despite the different absorption profiles, the working principle of these benchmark polymer donors with a same electron acceptor, specially PDI-based acceptors, was rarely compared. To this end, we used PBDB-T and PBDTTT-EFT as the electron donors, and 1,1'-bis(2-methoxyethoxyl)-7,7'-(2,5-thienyl) bis-PDI (Bis-PDI-T-EG) as the electron acceptor to fabricate PSCs, and systematically compared their differences in device performance, carrier mobility, recombination mechanism and film morphology.
关键词polymer solar cells perylene diimide charge transport charge recombination non-fullerene wide bandgap narrow bandgap
DOI10.3389/fchem.2018.00613
发表期刊FRONTIERS IN CHEMISTRY
ISSN2296-2646
卷号6页码:8
收录类别SCI
WOS记录号WOS:000452613600001
语种英语