In this paper, the electrical and photoelectric properties of thin films of polyphenylquinoline containing the phenylamine bridging group and 2,1,3-benzothiadiazole moiety are studied. An analysis of the conductivity and photoconductivity temperature dependences indicates hopping mechanism of conductivity over localized states, which are separated from Fermi level by an energy 0.85-1.0 eV. The activation energy of the charge carriers mobility is 0.2 eV. From the analysis of the photoconductivity and the absorption coefficient spectral dependences, estimate of the optical width of the investigated material band gap was obtained equal to 1.8-1.9 eV, and an exponential behavior of the density distribution function of states within the band gap near the zones edges was determined. The analysis of the photoconductivity lux-ampere dependences indicates a bimolecular recombination of nonequilibrium charge carriers in the investigated material at room temperature.
72.80.Le Polymers; organic compounds
73.50.Pz Photoconduction and photovoltaic effects
$^1$MSU, Faculty of Physics, Department of Semiconducters\
$^2$A.M. Prokhorov General Physics Institute RAS\
$^3$Institute of Physical Chemistry RAS
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