SELF-CONSIST CHARGING PROCESS OF POLYMER IRRADIATED BY INTERMEDIATE-ENERGY ELECTRON BEAM

Jing Liu () and Hai-Bo Zhang
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Jing Liu: Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
Hai-Bo Zhang: Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China

Surface Review and Letters (SRL), 2014, vol. 21, issue 05, 1-10

Abstract: This paper reports on the electron scattering, charge transport and charge trapping of a polymer subjected to intermediate-energy electron beam in a self-consist charging model. Numerical simulation of a charging balance is performed using incident intermediate-energy electron current and leakage current, and the space charging characteristics are examined. The mechanisms involve various microscopic parameters that are related to the space potential and the characteristics of the polymer as well as to the effects of the space charge, electron charge, hole charge and trapped charge itself. The dynamic transporting and trapping properties of a polymer are investigated, and the space potential is evaluated using various parameters of irradiation. Trapping of electrons is determined using Poole–Frenkel trapping–detrapping mechanisms. Various types of space charging behavior are observed by controlling irradiation conditions. Furthermore, the peak location of space charge is simulated and validated by Sessler's experimental data in microscopic perspective.

Keywords: Polymer; intermediate-energy electron beam; space potential; irradiation; numerical simulation (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1142/S0218625X14500620

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