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Issue 14, 2005
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Synthesis and properties of end-capped sexithiophenes incorporating the ethylene dithiothiophene unit

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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: E1½ = +0.61 V, E2½ = +0.97 V; 10b: E1½ = +0.70 V, E2½ = +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 C60 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%.

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

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Article information


Submitted
08 Oct 2004
Accepted
21 Dec 2004
First published
02 Feb 2005

J. Mater. Chem., 2005,15, 1446-1453
Article type
Paper

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

C. R. Mason, P. J. Skabara, D. Cupertino, J. Schofield, F. Meghdadi, B. Ebner and N. S. Sariciftci, J. Mater. Chem., 2005, 15, 1446
DOI: 10.1039/B415610B

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