Open AccessDeep trap sites suppressing space charge injection in polycyclic aromatic compounds doped XLPE composite
Author(s) -
Li Jin,
Han Chenlei,
Du Boxue,
Takada Tatsuo
Publication year - 2020
Publication title -
iet nanodielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.23
H-Index - 9
ISSN - 2514-3255
DOI - 10.1049/iet-nde.2019.0035
Subject(s) - space charge , doping , polyethylene , composite number , materials science , charge (physics) , computational chemistry , chemistry , composite material , physics , optoelectronics , electron , quantum mechanics
In this study, the space charge characteristics in the polycyclic aromatic compounds doped cross‐linked polyethylene (XLPE) composite were analysed by integration current ( Q ( t )) method and quantum chemical calculation. Experimentally, the space charge behaviours of XLPE composites modified by the three selected polycyclic aromatic compounds during polarisation and depolarisation process at 25 and 80°C were measured by Q ( t ) method, respectively. The energy levels and 3D potential distributions of the three polycyclic aromatic compounds were calculated by density functional theory. The experimental and calculation results indicate that the polycyclic aromatic compound C with deep carrier traps and stronger polarity exhibits outstanding ability to reduce space charge injection than the others at both 25 and 80°C. Generally, 4,4′‐bis (dimethyl amino) benyil has great potential as the organic additive for DC cable insulation from the view of space charge suppression.