Simulation of Space Charge Dynamics in Low-Density Polyethylene Using the Gaussian Disorder Model

Space charge dynamics in a low-density polyethylene (LDPE) film is calculated using mobility based on the Gaussian disorder model (GDM), which is commonly used to describe hopping conduction in disordered materials. The GDM exhibits a negative differential mobility under a strong positional disorder...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2022-06, Vol.29 (3), p.891-897
Main Authors: Ozaki, Ryotaro, Takeda, Kazuya, Yano, Taichi, Yudate, Shinji, Kadowaki, Kazunori
Format: Article
Language:English
Subjects:
Aluminum
Cathodes
Charge density
Charge simulation
Electric fields
Gallium arsenide
Gaussian disorder model (GDM)
Hopping conduction
Low density polyethylenes
low-density polyethylene (LDPE)
Mathematical models
mobility
Polyethylene
Space charge
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Summary:Space charge dynamics in a low-density polyethylene (LDPE) film is calculated using mobility based on the Gaussian disorder model (GDM), which is commonly used to describe hopping conduction in disordered materials. The GDM exhibits a negative differential mobility under a strong positional disorder. In simulations, injected charges do not form packet-like space charges when using a constant mobility model, whereas packet-like space charges appear when using the mobility based on the GDM. The simulation using the GDM mobility can reproduce the time and voltage dependences of space charge behavior in LDPE. The calculated space charge, electric field, and current density profiles show good agreement with experimental results.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2022.3168375