Title :
Influence of dipole relaxation on charge transport in poly(n-vinylcarbazole)
Author :
Althausen, Dietrich ; Wünsche, Peter
Author_Institution :
Dept. of Phys., Leipzig Univ., Germany
Abstract :
The influence of dipole polarization on charge transport is investigated by measurements of photoinduced currents in poly(n-vinylcarbazole). This current decreases, reaches zero, and changes its direction before it finally decreases to zero. The intensity of the unusual current is reduced with temperature. The time when the current alters its direction depends on layer thickness, suggesting that the opposite direction of the current is caused by a volume effect. A theoretical algorithm is presented fitting the time behavior of the experimental values by using initial effective surface potential, charge carrier mobility, sample susceptibility, and dipole relaxation time
Keywords :
carrier mobility; dielectric polarisation; dielectric relaxation; electrets; electrical conductivity of amorphous semiconductors and insulators; photoconductivity; polymers; charge carrier mobility; charge transport; dipole polarization; dipole relaxation time; electret; initial effective surface potential; layer thickness; photoinduced currents; poly(n-vinylcarbazole); sample susceptibility; theoretical algorithm; volume effect; Charge carrier mobility; Charge measurement; Current measurement; Electrodes; Photoconductivity; Physics; Polarization; Surface fitting; Temperature; Time measurement;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167202
