Novel Dimethylmethylene‐Bridged Triphenylamine‐PDI Acceptor for Bulk‐Heterojunction Organic Solar Cells

A novel, star‐shaped electron acceptor, DMTPA‐PDI3, derived from a planar dimethylmethylene‐bridged triphenylamine core with three acetylene‐linked perylene diimide (PDI) units is developed as a nonfullerene acceptor for organic solar cells (OSCs). DMTPA‐PDI3 manifests significantly reduced intramol...

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Bibliographic Details
Published in:Advanced science 2017-10, Vol.4 (10), p.1700110-n/a
Main Authors: Xiong, Yu, Wu, Bo, Zheng, Xiaoyan, Zhao, Zheng, Deng, Ping, Lin, Ming, Tang, Benzhong, Ong, Beng S.
Format: Article
Language:English
Subjects:
Communication
Communications
Design
Geometry
nonfullerene acceptors
organic solar cells
perylene diimide
Photovoltaic cells
Solar energy
Thin films
triphenylamine
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Summary:A novel, star‐shaped electron acceptor, DMTPA‐PDI3, derived from a planar dimethylmethylene‐bridged triphenylamine core with three acetylene‐linked perylene diimide (PDI) units is developed as a nonfullerene acceptor for organic solar cells (OSCs). DMTPA‐PDI3 manifests significantly reduced intramolecular twisting, enabling sufficient system‐wide π‐electron delocalization leading to broadened spectral absorption and raised lowest unoccupied molecular orbital level. As a result, higher and more balanced hole and electron transport properties are observed. Active layers for OSCs comprising DMTPA‐PDI3 acceptor and PBT7‐Th donor exhibit suppressed intermolecular aggregation, giving rise to uniform nanophase network formation. These OSC devices have afforded respectably high power‐conversion efficiency of about 5%. A novel, star‐shaped electron acceptor, DMTPA‐PDI3, derived from planar dimethylmethylene‐bridged triphenylamine core with three acetylene‐linked perylene diimides (PDIs) is developed for nonfullerene organic solar cells (OSCs). Active layers for OSCs comprising DMTPA‐PDI3 and PBT7‐Th manifest suppressed intermolecular aggregation leading to formation of uniform nanophase network. OSC devices using DMTPA‐PDI3 acceptor have afforded respectably high power‐conversion efficiency of about 5%.
ISSN:2198-3844
2198-3844
DOI:10.1002/advs.201700110