Generation and transport of charge carriers in polyvinylcarbazole |
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Authors: | A. P. Tyutnev V. S. Saenko V. A. Kolesnikov E. D. Pozhidaev |
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Affiliation: | (1) Moscow State Institute of Electronics and Mathematics, Trekhsvyatitel’skii per. 3/12, Moscow, 109028, Russia;(2) Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia |
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Abstract: | The processes of generation and transport of excess charge carriers in polyvinylcarbazole at room temperature and at 353 K were experimentally studied. The polymer was charged with pulses of electrons at energies of 7 and 50 keV, which differed in both linear energy transfer and track structure. A universal method of investigation based on the combination of the time-of-flight technique in the both (surface and bulk) modes with the measurement of radiation-induced conductivity was used. The radiation-chemical yield of free charges was measured using two independent procedures. It was shown that the radiation chemical yield of free charges at 293 K was somewhat smaller for 7-keV than for 50-keV electrons; in the latter case, G = 1.1 in an electric field of 2 × 107 V/m. The parameters of the generalized physical model were determined for polyvinylcarbazole. |
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