Synthesis and properties of end-capped sexithiophenes incorporating the ethylene dithiothiophene unit

Christopher R. Mason, Peter J. Skabara, Domenico Cupertino, John Schofield, Farideh Meghdadi, Berndt Ebner, N. Serdar Sariciftci

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27 Citations (Scopus)

Abstract

Two new end-capped sexithiophene derivatives (10a and 10b) have been synthesised and characterised by absorption spectroscopy, cyclic voltammetry and UV-vis spectroelectrochemistry. Both oligomers undergo two reversible, sequential oxidation processes (10a: E-1(1/2) = +0.61 V, E-2(1/2) + 0.97 V; 10b: E-1(1/2) 5 +0.70 V, E-2(1/2) + 0.91 V vs. Ag/AgCl) and the electronic band gaps of the materials are ca. 2.2 eV (solid state). Sexithiophene 10a has been incorporated as an electron donor material, with C-60 as acceptor, in a bilayer photovoltaic device. The power conversion efficiency is a modest 0.12%, whilst the maximum IPCE at 350 nm gave an external quantum efficiency of ca. 12%.
Original languageEnglish
Pages (from-to)1446-1453
Number of pages7
JournalJournal of Materials Chemistry
Volume15
Issue number14
DOIs
Publication statusPublished - 2005

Keywords

  • photoinduced electron-transfer
  • model systems
  • substituted oligothiophenes
  • photovoltaic devices
  • conjugated polymers
  • films
  • spectra
  • blends
  • raman
  • c-60

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    Mason, C. R., Skabara, P. J., Cupertino, D., Schofield, J., Meghdadi, F., Ebner, B., & Sariciftci, N. S. (2005). Synthesis and properties of end-capped sexithiophenes incorporating the ethylene dithiothiophene unit. Journal of Materials Chemistry, 15(14), 1446-1453. https://doi.org/10.1039/b415610b