Influence of the heteroatom on the optoelectronic properties and transistor performance of soluble thiophene-, selenophene- and tellurophene-vinylene copolymers.

There is a clear trend across the series, with the spectra in both solution and thin film red-shifting as the heteroatom is changed, hence moving from sulfur ( P3TV ) to tellurium ( P3TeV ) results in a red shift of 71 nm in solution and 80 nm in film, whereby the polymer containing the tellurium atom shows the largest red-shift absorption in both solution and film.

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