학술논문
Non-linear conduction and dispersion in conducting polymers
Document Type
Conference
Author
Source
Proceedings of Conference on Electrical Insulation and Dielectric Phenomena - CEIDP '96 Electrical insulation and dielectric phenomena Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on. 2:713-716 vol.2 1996
Subject
Language
Abstract
The conductivity of thin films of conducting polymer deposited between lithographically-fabricated microelectrodes was measured between 100 Hz and 40 MHz. The inter-electrode spacing of 10 /spl mu/m gave field strengths up to 50 kV/m within the film in response to applied voltages up to 0.5 V. The conductance and capacitance of the films exhibited sample- and counter-ion-dependent degrees of voltage-dependency at frequencies below 1 MHz, but became essentially voltage-independent above about 30 MHz (at room temperature). The disappearance of the voltage sensitivity coincides with a dispersion in the 1-30 MHz range. These results suggest that the low-frequency conductivity of the films is determined by the difficulty involved in inter-granular or inter-domain charge transport.