Trapping-charging ability and electrical properties study of amorphous insulator by dielectric spectroscopy
| Autor: | Béchir Yangui, B. Askri, Omar Mekni, K. Raouadi, Gilles Damamme, Hakim Arifa |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 116:104104 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.4895124 |
| Popis: | 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 e′ and the dissipation factor Tan(δ). We prove that the evolution of the imaginary part of the complex permittivity against temperature e″=f(T) reflects the phenomenon of charge trapping and detrapping as well as trapped charge evolution Qp(T). We also use the electric modulus formalism to better identify the space charge relaxation. The investigation of trapping or conductive nature of insulating ma... |
| Databáze: | OpenAIRE |
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