Organic donor materials based on bis(arylene ethynylene)s for bulk heterojunction organic solar cells with high VOC values

Hongmei Zhan, Qian Liu, Fengrong Dai, Cheuk Lam HO, Yingying Fu, Leijiao Li, Li Zhao, Hua Li, Zhiyuan Xie*, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A series of purely organic small molecules 1-4 based on bis(arylene ethynylene)s with various electron-rich aromatic bridges, such as benzene, cyclopentadithiophene (CDT), and diphenyl(p-tolyl)amine, were synthesized by a Sonogashira coupling reaction. Their optical, electronic, and electrochemical properties were fully characterized. The photovoltaic properties of these molecules as donor materials and [6,6]-phenyl-C71-butyric acid methyl ester as an acceptor material in solution-processed bulk heterojunction devices were studied. Among them, CDT-bridged molecule 2 exhibited the best photovoltaic performance and achieved a power conversion efficiency of 3.28%. In addition, the photovoltaic efficiencies of these molecules are higher than their corresponding platinum-containing counterparts, probably owing to their stronger light absorption and improved open-circuit voltage.

Original languageEnglish
Pages (from-to)1017-1024
Number of pages8
JournalChemistry - An Asian Journal
Volume10
Issue number4
DOIs
Publication statusPublished - Apr 2015

Scopus Subject Areas

  • Biochemistry
  • Organic Chemistry

User-Defined Keywords

  • conjugation
  • donor-acceptor systems
  • electrochemistry
  • organic solar cells
  • photochemistry

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