K. Pichler, R. Friend, K. Murray
Nov 1, 1994
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Influential Citations
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Journal
Molecular Crystals and Liquid Crystals
Abstract
Abstract We have synthesised and investigated poly(3-dodecylthiophene), P3DT, with the side-chains in regioregular head-to-tail positions. The content of head-to- tail linked units in the polymer is assessed by NMR spectroscopy and estimated to above 95 %. This regioregular P3DT shows more structure in the optical absorption spectra than the regiorandom material. Mobile dopants/impurities are present in a concentration of the order of 1017 cm−3, as in the regiorandom polymer. We also find that the charge carrier mobility (10−6 -10−7 cm2/Vs) does not seem to depend significantly on side-chain regularity. Photoluminescence is very similar to that in the regiorandom material, indicating efficient spectral diffusion.