Transition from dispersive to non-dispersive transport as seen by TSC in PVK/PC mixture

Author

Ulanski, Jacek ; Sielski, Jan ; Glowacki, Ireneusz ; Kryszewski, Marian

Author_Institution

Polymer Inst., Tech. Univ. of Lodz, Poland

fYear

1991

fDate

25-27 Sep 1991

Firstpage

90

Lastpage

95

Abstract

TOF (time-of-flight) measurements were carried out for a poly(N-vinyl carbazole)/polycarbonate mixture in the temperature range 220-370 K. Around 250 K a transition from dispersive to non-dispersive (D-ND) hole transport with increasing temperature was found to occur. Comparison of TSC (thermally stimulated current), TL (thermoluminescence), isothermal TOF, and thermally stimulated TOF indicates that the dispersive transport results from frozen-in energetic disorder rather than from multiple trapping. In simultaneous TL and TSC measurements no evidence of effective trapping in the temperature range of the D-ND transition was found. The field- and thickness dependent TSC peak in this temperature range is not the `detrapping peak´ but rather is equivalent to the thermally stimulated TOF signal

Keywords

carrier mobility; electrets; luminescence of inorganic solids; polymer blends; thermally stimulated currents; thermoluminescence; time of flight spectra; 220 to 370 K; TOF signal; dispersive transport; electrets; field-dependence; frozen-in energetic disorder; hole transport; nondispersive transport; poly(N-vinyl carbazole)/polycarbonate mixture; thermally stimulated current; thermoluminescence; thickness dependent; Aluminum; Casting; Charge carriers; Dispersion; Electrodes; Isothermal processes; Methanol; Polymers; Shape; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)

Conference_Location

Berlin

Print_ISBN

0-7803-0112-9

Type

conf

DOI

10.1109/ISE.1991.167188

Filename

167188