Characteristic features of the photoconductivity and spin conversion of electron-hole pairs in doped amorphous molecular semiconductors in the dye absorption region |
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Authors: | N A Davidenko A A Ishchenko |
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Institution: | (1) T. Shevchenko Kiev State University, 252033 Kiev, Ukraine;(2) Institute of Organic Chemistry, Ukrainian Academy of Sciences, 253094 Kiev, Ukraine |
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Abstract: | The photoconductivity of doped poly-N-epoxypropylcarbazole films in the absorption region of a cationic polymethine dye is observed to increase when the BF
4
−
ion is replaced by Cl− and I−. The effect of a magnetic field on the photoluminescence is investigated at room temperature. The photoconductivity is studied
as a function of the electric field intensity and wavelength of light. The dependence of the photoconductivity on the nature
of the anion can be explained by a change in the probability of intercombination conversion in ionic and electron-hole pairs.
Fiz. Tverd. Tela (St. Petersburg) 41, 44–48 (January 1999) |
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