Synthesis and characterization of donor-acceptor poly(3-hexylthiophene) copolymers presenting 1,3,4-oxadiazole units and their application to photovoltaic cells

Hsu Shen Wang, Ming Shin Su, Kung-Hwa Wei*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We have used Grignard metathesis polymerization to prepare poly(3-hexylthiophene)-based copolymers containing electron-withdrawing 4-tert-butyl phenyl-1,3,4-oxadiazole-phenyl moieties as side chains. We characterized these copolymers using 1H and 13C nuclear magnetic resonance spectroscopy, thermogravimetric analysis, and gel permeation chromatography. The band gap energy of copolymer was determined from the onset of the optical absorption. The quenching effects were observed in the photoluminescence spectra of the copolymers incorporating pendant electron-deficient 1,3,4-oxadiazole moieties on the side chains. The photocurrents of devices were enhanced in the presence of an optimal amount of the 1,3,4-oxadiazole moieties, thereby leading to improved power conversion efficiencies.

Original languageEnglish
Pages (from-to)3331-3339
Number of pages9
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume48
Issue number15
DOIs
StatePublished - 1 Aug 2010

Keywords

  • Conjugated polymers
  • Copolymerization
  • Heteroatom-containing polymers
  • Oxadiazole
  • Photovoltaic cell

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