The effect of the fluorine loading on the optoelectronic and photovoltaic properties of (X-DADAD-)n-type donor–acceptor copolymers with the benzothiadiazole A units

Alexander V. Akkuratov, Diana K. Susarova, Liana N. Inasaridze, Pavel A. Troshin

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We synthesized and investigated novel low bandgap (X-DADAD-)n-type donor–acceptor copolymers comprising non-fluorinated 2,1,3-benzothiadiazole (BT) and the fluorine-containing 5,6-difluoro-2,1,3-benzothiadiazole (ffBT) as the electron acceptor blocks (A). The introduction of fluorine substituents was shown to influence optical, electrochemical, and morphological properties of the polymers, as well as their photovoltaic performance. Optimized bulk heterojunction solar cells based on the fluorine-loaded polymer P2 showed improved characteristics (efficiency of 5.2%) as compared to the reference cells based on the non-fluorinated polymer P1 (efficiency of 4.4%).

Original languageEnglish
Article numbere201700087
JournalPhysica Status Solidi - Rapid Research Letters
Volume11
Issue number6
DOIs
Publication statusPublished - Jun 2017

Keywords

  • benzothiadiazole
  • bulk heterojunctions
  • conjugated polymers
  • fluorination
  • power conversion efficiency
  • solar cells

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