期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 29, 页码 15935-15943出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202101577
关键词
all-polymer solar cells; batch-to-batch insensitivity; narrow band gap polymer acceptors; power conversion efficiencies; selenophene
资金
- APRC Grants of the City University of Hong Kong [9380086]
- Innovation and Technology Bureau [ITS/497/18FP, GHP/021/18SZ]
- Guangdong-Hong Kong-Macao joint laboratory of optoelectronic and magnetic materials [2019B121205002]
- Research Grants Council of Hong Kong [C5037-18G]
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]
- National Natural Science Foundation of China [51773157, 52061135206]
- National Research Foundation (NRF) of Korea [NRF-2016M1A2A2940911, 2019R1A6A1A11044070]
The newly developed multi-selenophene-containing PSMA material PFY-3Se shows outstanding performance in all-polymer solar cells, with high efficiency, low energy loss, and good batch-to-batch reproducibility, indicating great potential for practical applications.
All-polymer solar cells (all-PSCs) progressed tremendously due to recent advances in polymerized small molecule acceptors (PSMAs), and their power conversion efficiencies (PCEs) have exceeded 15 %. However, the practical applications of all-PSCs are still restricted by a lack of PSMAs with a broad absorption, high electron mobility, low energy loss, and good batch-to-batch reproducibility. A multi-selenophene-containing PSMA, PFY-3Se, was developed based on a selenophene-fused SMA framework and a selenophene pi-spacer. Compared to its thiophene analogue PFY-0Se, PFY-3Se shows a approximate to 30 nm red-shifted absorption, increased electron mobility, and improved intermolecular interaction. In all-PSCs, PFY-3Se achieved an impressive PCE of 15.1 % with both high short-circuit current density of 23.6 mA cm(-2) and high fill factor of 0.737, and a low energy loss, which are among the best values in all-PSCs reported to date and much better than PFY-0Se (PCE=13.0 %). Notably, PFY-3Se maintains similarly good batch-to-batch properties for realizing reproducible device performance, which is the first reported and also very rare for the PSMAs. Moreover, the PFY-3Se-based all-PSCs show low dependence of PCE on device area (0.045-1.0 cm(2)) and active layer thickness (110-250 nm), indicating the great potential toward practical applications.
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