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

ABSTRACT: 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 ?-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%.

SUBMITTER: Xiong Y

PROVIDER: S-EPMC5644237 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature

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

Xiong Yu Y Wu Bo B Zheng Xiaoyan X Zhao Zheng Z Deng Ping P Lin Ming M Tang Benzhong B Ong Beng S BS

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20170622 10

A novel, star-shaped electron acceptor, DMTPA-PDI<sub>3</sub>, 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-PDI<sub>3</sub> 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 res ...[more]

PMID: 29051855

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