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

  • Yu Xiong
  • , Bo Wu
  • , Xiaoyan Zheng
  • , Zheng Zhao
  • , Ping Deng
  • , Ming Lin
  • , Benzhong Tang
  • , Beng S. Ong*
  • *此作品的通讯作者
  • Research Centre of Excellence for Organic Electronics
  • Hong Kong Baptist University
  • Hong Kong University of Science and Technology
  • Department of Chemistry
  • Agency for Science, Technology and Research, Singapore

科研成果: 期刊稿件 › 文章 › 同行评审

摘要

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%.

源语言英语
期刊论文编号1700110
期刊Advanced Science
卷4
期10
DOI
出版状态已出版 - 10月 2017
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