Study of photoconductivity and luminescence of amorphous molecular
semiconductors doped by polymethine dyes

N.Davydenko, A.Ischenko*, A.Kadaschuk**,
N.Kuvshinsky, N.Ostapenko**, Yu.Skryshevsky**

Taras Shevchenko University, 64 Vladimirskaya St.,
252033 Kyiv, Ukraine
*Institute for Organic Chemistry, National Academy of Sciences of
Ukraine, 252094 Kyiv, Ukraine
**Institute for Physics, National Academy of Sciences of Ukraine,
46 Nauki Ave., 252650 Kyiv, Ukraine

 An anomalous temperature-dependent photoconductivity increase
of poly-N-epoxy<->propylcarbazole films doped by polymethine
dyes has been found to to be associated with that traps for non-equilibrium
charge carriers are formed in these films under irradiation and those
traps are destroyed when the temperature increases. The above traps
cause a broadening of the high-temperature shoulder of thermostimulated
luminescence curves after preliminary film irradiation by visible
or UV light at 250-320K and the appearance of a new narrow
peak near the preirradiation temperature.

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