期刊
JOURNAL OF ENERGY CHEMISTRY
卷 70, 期 -, 页码 576-582出版社
ELSEVIER
DOI: 10.1016/j.jechem.2022.03.030
关键词
Organic photovoltaic; Medium bandgap; Electron withdrawing unit; Non-covalent interaction
资金
- National Natural Science Foun-dation of China [22125901, 21722404]
- Research Grants Council (RGC) of Hong Kong [14303519]
- Joint Laboratory Funding Scheme Project [JLFS/P-102/18]
- NSFC/RGC Joint Research Scheme Grant [N_CUHK418/17]
- CUHK direct grant [4442384]
Medium bandgap electron acceptors with fully non-fused structures and planar/rigid conformations have been developed for organic photovoltaics, achieving high power conversion efficiency and low non-radiative loss.
The cost-effective organic semiconductors are strongly needed in organic photovoltaics (OPVs). Herein, two medium bandgap (MBG) electron acceptors, TPT4F and TPT4Cl are developed via the new design of multi-noncovalent interaction assisted unfused core, flanked with two electron withdrawing end groups. These fullly non-fused MBG acceptors adapt the planar and rigid conformation in solid, therefore exhibiting the ordered face-on stacking and strong photoluminescence in films. As results, TPT4Cl-based OPVs, upon blending with the PBDB-TF polymer donor, have achieved a power conversion efficiency of 10.16% with a low non-radiative loss of 0.27 eV, representing one of the best fullly non-fused medium bandgap acceptors with desirable cost-efficiency balance. (c) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
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