Trap Property and Charge Transmission in PE

2020 ◽  
pp. 129-155
Keyword(s):  
Charge Transfer ◽  
Electrical Properties ◽  
Space Charge ◽  
Transfer Process ◽  
Breakdown Strength ◽  
Electrical Performance ◽  
Trap Level ◽  
Charge Transfer Process ◽  
Direct Current Conductivity ◽  
Trapping Process

The electrical properties of the dielectric are achieved by affecting the charge transfer process. The trap characteristics have an important influence on the electrical properties of the dielectric by affecting the charge transfer process. Aggregation and trap level characteristics of nanographene on low density polyethylene (LDPE). The direct current conductivity, breakdown strength, trap level distribution, space charge distribution, and charge mobility of nanocomposites were investigated. The experimental results show that the interface region between graphene and polymer introduces many deep traps in the forbidden band of nanocomposites, which can reduce the trapping process of charge and inhibit the accumulation of space charge. This indicates that the addition of nanoscale graphene has a significant improvement in the electrical performance of high voltage DC cables, which will provide a reference for production and application.

Theoretical study on the charge transport and metallic conducting properties in organic complexes

2019 ◽  
Vol 21 (24) ◽  
pp. 13304-13318 ◽  
Author(s):  
Ya-Rui Shi ◽  
Yu-Fang Liu
Keyword(s):  
Charge Transfer ◽  
Electrical Properties ◽  
Charge Transport ◽  
Organic Semiconductors ◽  
Electron Acceptor ◽  
Transfer Process ◽  
Theoretical Study ◽  
Charge Transfer Process ◽  
Organic Complexes ◽  
Molecular Doping

The charge transfer process between substrate molecular and dopant always appears in doped organic semiconductors, so that molecular doping is a common method to improve the electrical properties by combining appropriate complexes of electron acceptor and donor molecules.

scholarly journals Preparation Methods of Polypropylene/Nano-Silica/Styrene-Ethylene-Butylene-Styrene Composite and Its Effect on Electrical Properties

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 797 ◽  
Author(s):  
Mingze Gao ◽  
Jiaming Yang ◽  
Hong Zhao ◽  
Hui He ◽  
Ming Hu ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Space Charge ◽  
Composite System ◽  
Breakdown Strength ◽  
Nano Particles ◽  
Electrical Performance ◽  
Dispersion Characteristics ◽  
Ternary Composite ◽  
Nano Sio2 ◽  
Improvement Effect

Compared with traditional insulation materials, such as cross-linked polyethylene (XLPE), polypropylene (PP) is famous for its better recyclable and thermal properties, as well as its good electrical performance. However, the problem of poor impact strength has restricted the application of pure PP in high-voltage, direct current (HVDC) cables. In this paper, styrene-ethylene-butylene-styrene block copolymer (SEBS) was used as a toughening filler, and nano-SiO2 was expected to improve the electric properties of the nano-composite. By controlling the masterbatch system, the dispersion characteristics of nano-SiO2 in the ternary composite system were changed. When PP/SiO2 was used as the masterbatch and then blended with SEBS, nano-SiO2 tended to disperse in the PP phase, and the number of nano-particles in the SEBS phase was lower. When PP/SEBS was used as the masterbatch, nano-SiO2 was distributed in both the PP phase and the SEBS phase. When SEBS/SiO2 was used as the masterbatch, nano-SiO2 tended to be dispersed in the SEBS phase. The different dispersion characteristics of nano-SiO2 changed the crystallization and mechanical properties of the ternary composite system and produced different electrical performance improvement effects. The results of our experiment revealed that the space charge suppression capability was positively correlated with the direct current (DC) breakdown strength improvement effect. Compared with the DC performance of 500 kV commercial XLPE materials, the self-made PP-based ternary composite system has better space charge suppression effects and higher DC breakdown strength. When nano-SiO2 was more dispersed in the PP phase, the space charge improvement effect was best. When the nano-SiO2 particles were more dispersed in the SEBS phase, the expected electrical property improvement was not obtained. Scanning electron microscopy showed that the nano-SiO2 particles in the SEBS phase were more dispersed at the interface than in the SEBS matrix, indicating that the nano-particles were poorly dispersed, which may be a reason why the electrical properties of the composite system were not significantly improved.

Study of charge transfer process in system of «hemoglobin-electrode» at level of individual molecules

2018 ◽  
pp. 71-74
Author(s):  
N. A. Davletkildeev ◽  
◽  
D. V. Sokolov ◽  
E. A. Zimbovich ◽  
E. Yu. Mosur ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transfer Process ◽  
Charge Transfer Process

scholarly journals Impact of the charge transfer process on the Fe2+/Fe3+distribution at Fe3O4 magnetic surface induced by deposited Pd clusters

2021 ◽  
pp. 121879
Author(s):  
Bertrand Sitamtze Youmbi ◽  
Carl-Hugo Pélisson ◽  
Audrey Denicourt-Nowicki ◽  
Alain Roucoux ◽  
Jean-Marc Greneche
Keyword(s):  
Charge Transfer ◽  
Transfer Process ◽  
Magnetic Surface ◽  
Charge Transfer Process ◽  
Pd Clusters

EPR Study on the complex formed by charge-transfer process between ground-state acceptor chloranil and nine donors

2010 ◽  
Vol 16 (5) ◽  
pp. 397-403
Author(s):  
Shi Ji-Liang ◽  
Zhou Cheng-Ming ◽  
Yi Hu-Nan ◽  
Qiu Zhi-Hai ◽  
Fu Yao-Hong ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transfer Process ◽  
Ground State ◽  
Charge Transfer Process

Optical Study of the Fe3+-Related Emission at 0.5 eV in InP:Fe

1992 ◽  
Vol 262 ◽  
Author(s):  
Klaus Pressel ◽  
G. Bohnert ◽  
A. Dörnen ◽  
K. Thonke
Keyword(s):  
Fourier Transform ◽  
Fine Structure ◽  
Charge Transfer ◽  
Transfer Process ◽  
Decay Time ◽  
Optical Study ◽  
Charge Transfer Process ◽  
Excitation Mechanism ◽  
Different Temperatures ◽  
A Charge

ABSTRACTThe 0.5 eV (2.5 μm 4000 cm1) emission band in InP has been studied by optical spectroscopy. By the use of Fourier-transform-infrared photoluminescence we have been able to observe at least a three-fold fine structure in the zero-phonon transitions at ∼ 4300 cm−1 which are studied at different temperatures. Based on the fine structure and the long decay time of 1.1 ms we ascribe the 0.5 eV emission to the 4T1 → 6A1 spin-flip transition of Fe3+. The excitation spectrum of this Fe3+-related emission shows a characteristic fine structure at ∼ 1.13 eV which belongs to a charge-transfer process of the type: Fe3+ + hv (1.13 eV) → [Fe2+, bound hole]. We discuss the excitation mechanism of the 0.5 eV emission by charge-transfer states and compare the results with an emission at 3057 cm1 in GaAs, which we attribute to the same Fe3+ transition (decay time: 1.9 ms).

Sign in / Sign up

Export Citation Format

Share Document