Results 11 to 20 of about 9,339 (291)
Materials Research Express, 2020 Space charge dynamics under AC stress is of importance as a majority of high voltage cables are under AC stress, and space charge is the driving mechanism of dielectric degradation under these conditions.
Xinjing Cai +3 more
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Mesoscopic study of bipolar charge transport in polymer-based devices [PDF]
Synthetic Metals, 2001 AbstractWe present generalised Monte-Carlo calculations of bipolar charge carrier transport in polydiacetylene (PDA) to assess effects of some key factors on the properties of polymer-based light-emitting diodes (PLEDs). Our mesoscopic model includes specific realisations of the polymer network and examines the effect of polymer structural order on ...
Ramos, MMD, Stoneham, AM
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The Influence of Material Density on Bipolar Charge Transport in Polymer-Based Electronic Applications [PDF]
Materials Science Forum, 2006 Using a mesoscopic modelling approach, the authors performed computer experiments to study the influence of polymer density on bipolar charge evolution through thin layers of polydiacetylene (PDA) exhibiting specific microstructures. We found that the competition between charge transport, trapping and recombination within the polymer layer leads to ...
Ramos, Marta M. D. +2 more
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Correspondence of the sign change in organic magnetoresistance with the onset of bipolar charge transport [PDF]
Applied Physics Letters, 2008 In this work we examine the transition between positive and negative organic magnetoresistance in poly[2-methoxy-5-(3′, 7′-dimethyloctyloxy)-p-phenylenevinylene] in order to understand how different regimes of charge transport affect the organic magnetoresistance effect. To characterize the charge transport in these devices we measured the current, low
Bloom, F.L. +3 more
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High Voltage, 2022 The charge transport and accumulation in oil–paper can cause the insulation degradation. So far, the most widely used model to simulate space charge transport and accumulation is the bipolar charge transport (BCT) model, which can well simulate the space
Jiefeng Liu +5 more
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Preventing Space Charge Accumulation by Incorporating Electrets
Advanced Materials Interfaces, 2023 Space charge accumulates near electrodes in insulating materials under high voltage direct current. Electric stress created by charge accumulation distorts electric field, reduces the remaining useful life of insulating materials, and decreases partial ...
Pradip Chandra Saha +3 more
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IET Generation, Transmission & Distribution, 2021 The heterocharge accumulated in the oil‐paper insulation system of the converter transformer will enhance the local electric field and cause insulation deterioration. Numerical simulation is an effective method to analyze heterocharge.
Shen Yan +5 more
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Effect of DC Pre-stress on Space Charge and Electrical Tree in XLPE with Needle-Plate Electrodes
Zhongguo dianli, 2021 Space charge is one of the main factors that affect the electrical tree characteristics of HVDC cable insulation. Based on the bipolar charge transport model, this paper simulates the space charge distribution characteristics of the two-dimensional ...
Xiaobin XU +5 more
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Energies, 2021 In order to improve the thermal conductivity and the insulation properties of polyethylene (PE) used as cable insulation under DC stress, hexagonal boron nitride (h-BN) and inorganic particles have been considered as micro-filler and nano-filler ...
Xuri Xu +5 more
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A new model for surface potential decay of corona-charged polymers [PDF]
, 2010 Surface potential measurement provides a useful tool to gauge the electrical properties of materials. It has been observed that the potential of a sample with an initial high surface potential decays faster than that with an initial lower surface ...
Chen, George
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