Synthesis and properties of end-capped sexithiophenes incorporating the ethylene dithiothiophene unit
Journal of Materials Chemistry Pub Date: 2005-02-02 DOI: 10.1039/B415610B
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: E1? = +0.61 V, E2? = +0.97 V; 10b: E1? = +0.70 V, E2? = +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%.
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Journal Name：Journal of Materials Chemistry
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CAS no.: 89640-58-4
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