Surface Electroluminescence Phenomena from Polymer under AC Voltage

Yang, Kai; Zhang, Guanjun; Zhao, Wen-Bin; Zhang, Yan

doi:10.1109/deiv.2006.357432

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…For each sample, above the onset voltage of EL, while increasing the stepped voltage, the light intensity regularly increases. It seems stable during a voltage step with a slow attenuation, which is consistent with former experimental results [4,6,7,9]. Applied Voltage (kV) 5.8 Figure 2.…”

Section: Time-resolved El Characteristicssupporting

confidence: 91%

Electroluminescence and Surface Trap Distribution in Polymeric Insulation

Yang

Zhang

Dong

et al. 2007

2007 IEEE International Conference on Solid Dielectrics

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Electroluminescence (EL) phenomena are now recognized as a warning sign for electrical aging of insulating polymers. Generally, polymeric degradation reveals the increment of the density of luminescence and trap centers, so a fundamental study is proposed to correlate the EL emission of insulating polymers and their trapping parameters. A sensitive photon counting system is constructed to detect weak EL emission. The time-resolved EL characteristics from different polymers (LDPE, PP and PTFE) are investigated with a planar electrode configuration under stepped ac voltage in vacuum. In succession, each sample is charged with exposing multi-needle corona discharge, and then its surface potential decay is continuously recorded at a constant temperature. Based on the isothermal relaxation current theory, the trap energy level and density of both electron and hole distribution in the surface layer of each polymer is obtained. It is preliminarily concluded that EL phenomena are strongly affected by the trap properties, and for different polymers, its EL intensity is in direct contrast to its surface trap density, and this can be qualitatively explained by the trapping and detrapping sequence of charge carriers in trap centers with different energy levels.

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Section: Time-resolved El Characteristicssupporting

confidence: 91%

Electroluminescence and Surface Trap Distribution in Polymeric Insulation

Yang

Zhang

Dong

et al. 2007

2007 IEEE International Conference on Solid Dielectrics

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“…Meanwhile, the uniform field configuration utilizes plane parallel electrodes and thin polymer films in the experimental setting. Many kinds of research [8,[13][14][15][16][17][18][19][20][21] opted for this configuration because it can be used for many types of samples, as the former configuration only applies to polymers that can be made with embedded electrodes [2].…”

Section: Detection Of Elmentioning

confidence: 99%

“…A study by Kang Yang et al [21] found that each material has a different surface trap density and LDPE has the largest surface trap density followed by PTFE and PP. When electrons are injected into the polymer through high voltage stress, the charges will have to occupy the deep traps of the material before occupying its shallow traps.…”

Section: El Vs Type Of Materialsmentioning

confidence: 99%

Modelling Electroluminescence Emission in Polymeric Material Using Dimensional Analysis Method

et al. 2023

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The Electroluminescence (EL) technique has garnered significant interest over time for its reliable outcomes that enrich our understanding of the onset of electrical degradation in polymeric material. There is growing interest in combining both the EL technique and space charge measurement methods to obtain a more profound knowledge of the degradation and ageing of insulation. The generation of charge carriers in polymeric materials is widely acknowledged to be a crucial aspect of EL, involving injection, de-trapping, and field dissociation processes. This research investigates the variables that influence how EL emissions behave, including applied voltage or electric field, applied electrical frequency, ageing of material, and selection of materials and gases employed. It was found that these factors can be helpful in predicting the process of electrical ageing in insulation to avoid any catastrophes that may occur. A mathematical approach relating these factors and the intensity of EL is proposed through the aid of Dimensional Analysis method. A close relationship is obtained that suggests this mathematical approach can be utilised as a tool to predict electrical ageing of insulation material.

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Surface Electroluminescence Phenomena from Polymer under AC Voltage

Cited by 2 publications

References 10 publications

Electroluminescence and Surface Trap Distribution in Polymeric Insulation

Electroluminescence and Surface Trap Distribution in Polymeric Insulation

Modelling Electroluminescence Emission in Polymeric Material Using Dimensional Analysis Method

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