期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 16, 期 22, 页码 3767-3773出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202101018
关键词
perylene diimide (PDI); hexamer; organic solar cells; non-fullerene
资金
- National Natural Science Foundation of China (NSFC) [21801201, 51773160, 21975194]
- Research Fund for Distinguished Young Scholars of Hubei Province [2019CFA042]
- Wuhan University of Technology [40122004, 40120419, 3120619142, 35401020]
- National Innovation and Entrepreneurship Training Program for college students [S202010497006]
This study presents the design and synthesis of a propeller-shaped PDI hexamer T-DPDI, which exhibits superior photovoltaic performance in organic solar cells due to its stronger absorption and more favorable morphology, achieved by hybridizing the direct and indirect linkage manners of PDI units.
Perylene diimide (PDI) is one of the most intensively studied building blocks for the construction of non-fullerene acceptors (NFAs). In this contribution, based on combination of the direct and indirect linkage manners of PDI units at the bay position, a propeller-shaped PDI hexamer T-DPDI was designed and synthesized. The singly bonded PDI dimer DPDI and the benzene ring cored PDI trimer TPDI were synthesized for comparison. The photovoltaic performances of these three PDI derivatives were investigated using the commercially available PTB7-Th as electron donor. A best power conversion efficiency (PCE) of 6.58% was obtained for T-DPDI based organic solar cells (OSCs), which is higher than those of DPDI and TPDI based ones. The superior photovoltaic performance of T-DPDI can be ascribed to its stronger absorption and more favorable morphology. This study presents an interesting example of improving the photovoltaic performances of PDI based NFAs by hybridizing the direct and indirect linkage manners.
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