The effect of charged centers on the transport of charge carriers in molecularly doped polymers

Tyutnev, A. P.; Saenko, V. S.; Grach, E. P.; Pozhidaev, E. D.

doi:10.1134/s0965545x10070084

Cited by 6 publications

(1 citation statement)

References 19 publications

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“…As a result, it has not been accepted by the RIC community. Our attempt to include effects of molecular motions into the RFV model proved inconclusive as well [44].…”

Section: Discussionmentioning

confidence: 95%

Time-Resolved Radiation-Induced Conductivity of Polyimide and Its Description Using the Multiple Trapping Formalism

et al. 2019

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Polymer dielectrics subjected to intense radiation fluxes exhibit a radiation-induced conductivity (RIC). Polyimide is a good dielectric with excellent mechanical and thermal properties featuring high radiation resistance currently widely used in the spacecraft industry. Its RIC has been extensively studied in several laboratories. The purpose of the present study is to make a direct measurement of the RIC for both pulsed and continuous irradiation using a current sensing technique, which is contrary to the indirect method employing a surface-potential decay technique that is now preferred by spacecraft charging engineers. Our experiments are done in a small-signal regime excluding any recombination and dose effects. In combination with existing computer codes, we managed to develop further the conventional multiple trapping formalism and the RIC theory based on it. The main idea is to supplement an exponential trap distribution responsible for a dominant dispersive carrier transport in polymers with a small concentration of inherent deep traps which may or may not have an energy distribution. In line with this reasoning, we propose a tentative set of RIC model parameters for polyimide that accounts for the observed experimental data. The findings and their implications are discussed in a broad context of previous studies.

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“…As a result, it has not been accepted by the RIC community. Our attempt to include effects of molecular motions into the RFV model proved inconclusive as well [44].…”

Section: Discussionmentioning

confidence: 95%