Synthesis of a new wide-bandgap conjugated copolymer with 3-trifluoromethylthiophene monomer and Its application to non-fullerene polymer solar cells

Amaladass Pitchamuthu, Chang Geun Park, Su Hong Park, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticle

Abstract

In this study, a novel wide-bandgap conjugate donor-acceptor type copolymer, PBDT-TFMTh, containing benzodithiophene (BDT) as a donor unit and trifluoromethyl (TFM)-substituted thiophene (Th) as an acceptor unit was designed and synthesized. The physical, optical, and electrochemical properties of PBDT-TFMTh were studied in detail and it was found to have lower-lying highest occupied and lowest unoccupied molecular orbitals. The polymer solar cell with an active layer consisting of PBDT-TFMTh and acceptor IDT(TCV)2 showed a relatively high power conversion efficiency of 2.25% after thermal annealing at 120 °C.

Original languageEnglish
Pages (from-to)30-37
Number of pages8
JournalMolecular Crystals and Liquid Crystals
Volume686
Issue number1
DOIs
Publication statusPublished - 2019 Jun 13

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Keywords

  • 3-trifluoromethylthiophene
  • polymer solar cell
  • power conversion efficiency
  • wide-bandgap copolymer

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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