A. Bolognesi et al., Oriented poly(3-alkylthiophene) films: absorption, photoluminescence and electroluminescence behaviour, SYNTH METAL, 121(1-3), 2001, pp. 1279-1280
We have found that highly regioregular poly(3-alkylthiophene) can be conven
iently oriented by means of the rubbing technique. While in the absorption
polarized spectra we found a dichroic ratio up to 5, depending on the wavel
ength, the photoluminescence and electroluminescence polarization have not
the same value. A tentative explanation will be given taking into account t
hat only the surface of the film is oriented during the rubbing process.