期刊
ACS APPLIED ENERGY MATERIALS
卷 5, 期 12, 页码 15624-15637出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c03200
关键词
organic solar cells; BODIPY; perylene diimide; nonfullerene acceptors; star-shaped structure
资金
- Open Research Fund of School of Chemistry and Chemical Engineering, Henan Normal University [2020YB05]
- P. R. China
- University Grant Commission, New Delhi, India [CH/19 - 20/0028]
In this study, two new star-shaped perylene diimide (PDI)-based small-molecule acceptors, BDP-3PDI and BDP-4PDI, were successfully synthesized and their photophysical and electrochemical properties were investigated. When combined with a compatible D-A polymer donor P(BTT-DPP), the polymer solar cells achieved power conversion efficiencies (PCEs) of approximately 10.97% and 13.94% for BDP-3PDI and BDP-4PDI, respectively.
Two new star-shaped perylene diimide (PDI)-based small-molecule acceptors denoted as BDP-3PDI and BDP-4PDI with BODIPY derivatives as the core and PDI units as peripheral groups were designed and successfully synthesized, and their photophysical and electrochemical properties were studied. When paired with a compatible D-A polymer donor P(BTT-DPP), the polymer solar cells based on the bulk heterojunction active layer attained power conversion efficiencies (PCEs) of about 10.97 and 13.94% for BDP-3PDI and BDP-4PDI, respectively. The higher value of PCE for BDP-4PDI is mainly owing to the enhanced values of the fill factor and short circuit current as compared to BDP-3PDI and related to the more balanced charge transport and blocked charge recombination owing to the appropriate phase separation in the P(BTT-DPP):BDP-4PDI active layer as compared to P(BTT-DPP):BDP-3PDI.
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