K. Pichler et al., AN INVESTIGATION OF THE PHYSICAL-PROPERTIES OF HIGHLY REGIOREGULAR POLY(3-DODECYLTHIOPHENE), Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 256, 1994, pp. 671-677
We have synthesised and investigated poly(3-dodecylthiophene), P3DT, w
ith the side-chains in regioregular head-to-tail positions. The conten
t of head-to-tail linked units in the polymer is assessed by NMR spect
roscopy and estimated to above 95%. This regioregular P3DT shows more
structure in the optical absorption spectra than the regiorandom mater
ial. Mobile dopants/impurities are present in a concentration of the o
rder of 10(17) cm(-3), as in the regiorandom polymer. We also find tha
t the charge carrier mobility (10(-6)-10(-7) cm(2)/Vs) does not seem t
o depend significantly on side-chain regularity. Photoluminescence is
very similar to that in the regiorandom material, indicating efficient
spectral diffusion.