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Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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

Mason, Christopher R. and Skabara, Peter J. and Cupertino, Domenico and Schofield, John and Meghdadi, Farideh and Ebner, Berndt and Sariciftci, N. Serdar (2005) Synthesis and properties of end-capped sexithiophenes incorporating the ethylene dithiothiophene unit. Journal of Materials Chemistry, 15 (14). pp. 1446-1453. ISSN 0959-9428

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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%.