A novel copolymer from benzodithiophene and alkylsulfanyl-bithiophene: Synthesis, characterization and application in polymer solar cells

P. Morvillo, F. Parenti, R. Diana, C. Fontanesi, A. Mucci, F. Tassinari, L. Schenetti

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Abstract

We present the synthesis and characterization of a novel copolymer from benzodithiophene and alkylsulfanyl-bithiophene units, poly[4,8-bis(2- ethylhexyloxy)benzo[1,2-b:4,5-b′]dithiophene-alt-4,4′- bis(octylsulfanyl)-2,2′-bithiophene] (PolyS). The structural, electrochemical and photophysical properties of PolyS were investigated by gel permeation chromatography (GPC), thermogravimetric analysis (TGA), NMR, UV-vis, photoluminescence (PL) spectroscopy and cyclic voltammetry (CV). PolyS was used to fabricate bulk-heterojunction polymer solar cells (PSCs) in combination with the [60]PCBM and [70]PCBM (electron acceptors). The device realized using [70]PCBM shows a better current output due to the increased absorption of the blend film compared to the PolyS:[60]PCBM one. The power conversion efficiency of the best PSC realized is 2.3% under 100 mW/cm2AM 1.5 G illumination. © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)45 - 52
Number of pages8
JournalSolar Energy Materials and Solar Cells
Volume104
DOIs
Publication statusPublished - Sep 2012
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films

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