The emerging applications of organic field-effect transistors (OFETs), such as photon memories and artificial synapses, require polymer dielectrics with superior charge trapping properties. Despite the introduction high-k fluorinated polymers in performance optimization OFETs, there is still a lack widely recognized acknowledgment between molecular structures characteristics, well no general principles designing polymeric for electronic memory devices. Here, we propose series polystyrene...

Abstract Flashover is a crucial issue in both high-voltage engineering and surface physics. It not only challenges the existing theories about its dynamic evolution, but also inhibits clean energy revolution by limiting accessible voltage rating of power equipment. significance to elucidate microscopic process along interface improve flashover performance. In present study, synergic effect adsorbed gas charging investigated, which reveals long ignored factor for determining voltage....

The dielectric strength of cellulose–liquid composites is always about several times higher than that the cellulose paper and insulating liquids. However, this experimental phenomenon has not yet been demonstrated theoretically. Herein, spectra characterization, molecular simulation, wave function analysis method provide a new insight role nanoscale interfacial adsorption exclusive for affecting charge separation producing deep-level traps to seriously hinder electromigration under an...

High-energy storable polymer dielectrics are highly desirable and applicable for compact efficient power electronic devices. However, existing suffer from either a low dielectric constant or breakdown strength exhibit an extremely energy density. Here, the reversible addition−fragmentation chain transfer polymerization polyaddition techniques combined to create dithioester-terminated polythiourea (PTU)-based copolymer with extraordinarily high density of 10.7 J/cm3. The end-group...

Abstract Organic dielectric materials have been widely developed and investigated for energy storage capacitors. However, challenges remain in terms of the relatively low constant density. Enhancing dipolar polarization to increase is considered be an effective way improve density polymer dielectrics. Herein, enlightened by chain‐packing structure that affects relaxation behavior, a simple low‐cost approach proposed tailor interdomain spacing alicyclic polythiourea (PTU) changing quenching...

To date, breakdown voltage is an underlying risk to the epoxy-based electrical high (HV) equipment. improve strength of epoxy resin and explore formation charge traps, in this study, two types polyhedral oligomeric silsesquioxane (POSS) fillers are doped into resin. The test performed investigate neat epoxy/POSS composites. Electron traps that play important role characterized by thermally stimulated depolarized current (TSDC) measurement. A quantum chemical calculation tool identifies...

Dissolved gas in oil analysis (DGA) is one of the most reliable condition monitoring techniques, which currently used by industry to detect incipient faults within power transformers. While technique well matured since development various offline and online measurement techniques along with interpretation methods, no much attention was given so far sampling time its correlation transformer loading. A loading subject continuous daily seasonal variations, expected increase increased...

The cellulose-liquid biphasic dielectric composite serves as the irreplaceable main electrical insulating structure in power industry, owing to its peculiar high breakdown strength compared that of monophasic cellulose paper or liquid. Although this advanced characteristic is utilized worldwide, physical–chemical nature remains unclear, which greatly restricts design and improvement next generation composites. Herein, interfacial charge behaviors composites are investigated, results indicate...

Understanding charge injection at a metal/cross-linking epoxy resin (EP) interface facilitates the design and application of high-power electric electronic devices. This paper focuses on barrier metal/EP interfaces using first-principles calculation. Two fragmentary structures, obtained from cross-linking EP with amine anhydride curing agent, were selected to construct models Cu(111) slab. The barrier, dipole moment, transfer, vacuum energy level shift (Δ) examined. model groups produced...

With the rapidly increasing demand for electric power in society, transformers are expected to exhibit more stresses that accelerate process of insulation system degradation. However, effect temperature and pre-stressed voltage on breakdown oil immersed paper degradations is still not being fully revealed. In this paper, electrical degradation mineral impregnated kraft has been discovered under variable divergent time varying prestressed voltage. Besides, due oil-based may contaminate soil...

Here we report the combined effect of electric field with thermal stress on dissolved gas analysis (DGA). Dissolved gases detected from accelerated aging experiments show that AC leads to higher generation than DC or by alone. Research reveals differences are caused divergent migration properties charged components under and fields. A mathematical explanation correlates DGA results proposing a carrier recombination coefficient parameter. The study suggests content does not reflect insulation...

Dissolved gas analysis is significant for the exact fault diagnosis of power transformers. This paper focuses on investigating mechanism hydrogen production in insulating oil and oil-impregnated insulation (OIIP) by a metal passivator named N-bis(2-Ethylhexyl)-aminomethyl-tolutriazole (TTAA). High-performance liquid chromatography are used to quantitatively test concentration TTAA dissolved gases oil, respectively. The molecular dynamics simulation applied analyze mechanisms adsorption TTAA....

The rapid growth of power grid capacity and the widespread use a large number electronics non-linear loads have led to harmonics in system. Harmonics system will cause safety hazards normal operation equipment, exacerbate aging insulation materials, reducing overall reliability In present work, we used frequency ac voltage superimposed carry out ageing experiments on cable terminals. Then, tested infrared spectra, dielectric electrical conductivity, surface potential decay characteristics...

Surface flashover is key issue to limit the development of high voltage insulation equipment. Various nano-fillers are added improve performance epoxy composites. With ultimate goal enhance surface performance, two different types polyhedral oligomeric silsesquioxane (POSS) nanometric molecular structure doped into neat epoxy. has been tested under DC in SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> gas. Isothermal potential decay...

Radiation effect of electronic devices is a complex issue that attracted lot interest in the area aviation industry and nuclear engineering. In order to investigate relationship between structure damage electrical performance devices, first-principle modeling calculations were carried out link SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> /Si interfacial defect states electron transport properties devices. We found oxygen vacancy...

Greenhouse gas CO2 has rarely been used as an insulating in cellulose/oil insulated energy devices since the benefits of it on dielectric properties have yet to be known. This work reveals that can adsorbed by unaged and aged cellulose, improving breakdown strength composite. The traps introduced adsorption are proved key factor. makes shallow shallower, while making deep deeper. These changes hinder charge accumulation surfaces enhance electron capture ability bulk. Moreover, mobility...

Radiation effect of electronic devices is a complex issue that attracted lot interest in the area aviation industry and nuclear engineering. In order to investigate relationship between structure damage electrical performance devices, first-principle modeling calculations were carried out link SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> /Si interfacial defect states electron transport properties devices. We found oxygen vacancy...