Electroluminescence in insulating polymers in ac electric fields

Matsunaga, Tomohisa; Liu, Y.S.; Shionoya, W.; Yasuda, Kôichi; Ishii, Shozo; Miyata, Hiroyuki; Yokoyama, A.

doi:10.1109/94.625360

Cited by 34 publications

(11 citation statements)

References 17 publications

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“…PP and PTFE displays a similar EL intensity, but with the increment of voltage, PP reveals a higher value than PTFE. Previous research has indicated that EL intensity inside PTFE is larger than that inside LDPE, and in turn larger than that inside PP [10]. However, considering the present planar electrode configuration, the EL detected here is mainly from the polymer surface, but not from its bulk.…”

Section: Time-resolved El Characteristicscontrasting

confidence: 67%

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 Characteristicscontrasting

confidence: 67%

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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“…Materials used in the devices may need to be carefully scrutinized and selected to enhance and, in some cases, to suppress the secondary electron emission [28]. In microwave and millimeter wave power tubes, low secondary electron emission materials are desirable for depressed collectors in order to ensure high efficiency in the energy conversion [29,30]. Low secondary electron emission materials are also sought for coating the grids and the tube walls to prevent RF vacuum breakdown [7,8]; more evidences show that surface modification via nano coating might be a new alternative.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Breakdown characteristics of titanium dioxide–silicone–fluorophlogopite nanocomposite coating

Bai

Ling

2011

Surface and Coatings Technology

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“…AC electroluminescence of insulating polymers has been investigated deeply in relation with electrical ageing because its intensity, spatial distribution and spectral features bring information on the charge exchange process and material chemical degradation [1,2]. Less effort has been done on modelling EL on the basis of the charge exchange process.…”

Section: Introductionmentioning

confidence: 99%

Modelling electroluminescence in insulating polymers under sinusoidal stress: Effect of applied voltage, frequency and offset

Baudoin

Mills

Lewin

et al. 2011

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Recently, a charge transport model allowing the description of electroluminescence in polyethylene films under AC stress has been developed. The fluid model incorporates bipolar charge injection/extraction, transport and recombination. The model has been very successful in explaining the timedependence of EL under 50 Hz sinusoidal, triangular and square voltage waveforms. In this work we discuss experimental measurements and simulations using different frequencies of the sinusoidal stress, voltage amplitude and offset.

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Electroluminescence in insulating polymers in ac electric fields

Cited by 34 publications

References 17 publications

Electroluminescence and Surface Trap Distribution in Polymeric Insulation

Electroluminescence and Surface Trap Distribution in Polymeric Insulation

Breakdown characteristics of titanium dioxide–silicone–fluorophlogopite nanocomposite coating

Modelling electroluminescence in insulating polymers under sinusoidal stress: Effect of applied voltage, frequency and offset

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