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Title: Trapping-charging ability and electrical properties study of amorphous insulator by dielectric spectroscopy

Usually, the trapping phenomenon in insulating materials is studied by injecting charges using a Scanning Electron Microscope. In this work, we use the dielectric spectroscopy technique for showing a correlation between the dielectric properties and the trapping-charging ability of insulating materials. The evolution of the complex permittivity (real and imaginary parts) as a function of frequency and temperature reveals different types of relaxation according to the trapping ability of the material. We found that the space charge relaxation at low frequencies affects the real part of the complex permittivity ε{sup ´} and the dissipation factor Tan(δ). We prove that the evolution of the imaginary part of the complex permittivity against temperature ε{sup ′′}=f(T) reflects the phenomenon of charge trapping and detrapping as well as trapped charge evolution Q{sub p}(T). We also use the electric modulus formalism to better identify the space charge relaxation. The investigation of trapping or conductive nature of insulating materials was mainly made by studying the activation energy and conductivity. The conduction and trapping parameters are determined using the Correlated Barrier Hopping (CBH) model in order to confirm the relation between electrical properties and charge trapping ability.
Authors:
; ; ;  [1] ;  [1] ;  [2] ;  [3]
  1. Laboratory of Materials, Organization and Properties LR99ES17, University of Tunis El Manar, Campus Universities El Manar, 2092 Tunis (Tunisia)
  2. (Tunisia)
  3. CEA/Gramat, BP 80200, 46500 Gramat (France)
Publication Date:
OSTI Identifier:
22305964
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACTIVATION ENERGY; CORRELATIONS; DIELECTRIC MATERIALS; DISSIPATION FACTOR; ELECTRICAL PROPERTIES; FREQUENCY DEPENDENCE; PERMITTIVITY; RELAXATION; SCANNING ELECTRON MICROSCOPY; SPACE CHARGE; SPECTROSCOPY; TANTALUM NITRIDES; TRAPPING