Title :
Transition from dispersive to non-dispersive hole transport in poly-N-vinylcarbazole/polycarbonate mixtures
Author :
Ulanski, J. ; Sielski, J. ; Glowacki, I. ; Kryszewski, M.
Author_Institution :
Polymer Inst., Tech. Univ. of Lodz, Poland
fDate :
8/1/1992 12:00:00 AM
Abstract :
Isothermal time-of-flight (TOF) measurements carried out on films of a poly(N-vinyl carbazole)/polycarbonate mixture in the temperature range 220 to 370 K show that with increasing temperature a transition from dispersive (≲250 K) to nondispersive (>250 K) hole transport occurs. A comparison of thermally stimulated currents, thermoluminescence, isothermal TOF, and thermally stimulated TOF measurements indicates that the low-temperature dispersive transport results from frozen-in energetic disorder rather than from multiple trapping
Keywords :
carrier mobility; luminescence of organic solids; polymer blends; polymer films; thermally stimulated currents; thermoluminescence; 220 to 370 K; dispersive hole transport; frozen-in energetic disorder; isothermal TOF measurements; non-dispersive hole transport; poly-N-vinylcarbazole/polycarbonate mixtures; thermally stimulated currents; thermoluminescence; Charge measurement; Current measurement; Dispersion; Electric variables measurement; Electron beams; Isothermal processes; Polymer films; Pulse amplifiers; Pulse measurements; Temperature distribution;
Journal_Title :
Electrical Insulation, IEEE Transactions on
