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

TitleA novel copolymer from benzodithiophene and alkylsulfanyl-bithiophene: Synthesis, characterization and application in polymer solar cells
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2012
AuthorsMorvillo, P., Parenti F., Diana R., Fontanesi C., Mucci A., Tassinari F., and Schenetti L.
JournalSolar Energy Materials and Solar Cells
Volume104
Pagination45-52
ISSN09270248
KeywordsBenzodithiophene, Bithiophenes, Blend films, Bulk heterojunction, Conjugated polymers, Conversion efficiency, Copolymers, Current output, Cyclic voltammetry, Electron acceptor, Gel permeation chromatography, Heterojunctions, Organic solar cell, Photoluminescence spectroscopy, Photophysical properties, Photovoltaic devices, Polymer Solar Cells, Power conversion efficiencies, Solar cells, Thermogravimetric analysis
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/cm 2AM 1.5 G illumination. © 2012 Elsevier B.V. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84861333816&doi=10.1016%2fj.solmat.2012.04.044&partnerID=40&md5=ebe903abd59a7fdb3efef26055211ca3
DOI10.1016/j.solmat.2012.04.044