Thermally stimulated currents in molecularly doped polymers

James W. Stasiak; Teresa J. Storch

doi:10.1117/12.290249

9 October 1997 Thermally stimulated currents in molecularly doped polymers

James W. Stasiak, Teresa J. Storch

Proceedings Volume 3144, Xerographic Photoreceptors and Organic Photorefractive Materials II; (1997) https://doi.org/10.1117/12.290249
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Thermally stimulated currents (TSC) were measured in molecularly doped polymers consisting of the hole transport molecule p-diethylaminobenzaldehyde diphenyihydrazone (DEH) and the polymer binder bisphenol A polycarbonate (PC) at two different doping concentrations. The TSC spectrum, which consisted of a single, well resolved peak, was found to be dependent on the applied electric field, the heating rate and the dopant concentration. The peak maxima were located between 170K and 250K. The spectra were analyzed within the theoretical framework of Zielinski and Samoc which provided a procedure to extract the hopping activation energy for each concentration. The principle observations of this study are: (1) the TSC peak is unambiguously associated with charge transport, (2) the magnitude of the activation energies were found to be larger than values obtained from isothermal transient photocurrent measurements and (3) the activation energies obtained from analysis of the TSC spectra were found to be dependent on the doping concentration. This last observation is inconsistent with previous isothermal transient photocurrent measurements of doped polymer systems containing DEH.

Citation Download Citation

James W. Stasiak and Teresa J. Storch "Thermally stimulated currents in molecularly doped polymers", Proc. SPIE 3144, Xerographic Photoreceptors and Organic Photorefractive Materials II, (9 October 1997); https://doi.org/10.1117/12.290249

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