Carrier hopping transport in semi-crystalline isotactic polypropylene thin films: A revisit to the overestimated hopping distance

Xu, Zheng; Wang, Yizhu; Zhang, Le; Li, Jianying; Li, Shengtao

doi:10.1016/j.polymer.2019.121650

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…Therefore, the hopping conduction mechanism is reasonable to further analyze the conduction properties [ 26 ]. There is an increasing trend in hopping distances with temperatures [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

“…There is an increasing trend in hopping distances with temperatures [27]. Figure 7 shows charging currents versus temperatures und at 7000 s. In general, Ic increased exponentially with temperatur tion energy was approximately 0.31-0.44 eV regardless of the ap cating that conduction mechanisms were the same within 150-67 ured at different temperatures were not the same sample, but reference.…”

Section: Electric Field and Temperature Dependence Of Charging Currentsmentioning

confidence: 94%

“…Therefore, the hopping conduction mechanism is reasonable to further analyze the conduction properties [26]. There is an increasing trend in hopping distances with temperatures [27]. Figure 5b shows the charging current (I c ) versus the electric field at 40-120 • C in the form of lnI-lnE.…”

Section: Electric Field and Temperature Dependence Of Charging Currentsmentioning

confidence: 99%

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The Time, Electric Field, and Temperature Dependence of Charging and Discharging Currents in Polypropylene Films

et al. 2023

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The insulating properties of polypropylene (PP) film play a very important role in the operating status of direct current (DC) support capacitors. Charging and discharging currents in PP film under high DC electric fields and temperatures correspond to charge transportation and accumulation, which significantly influence the electrical insulating properties of PP. In this paper, we have comprehensively studied the dependence of charging/discharging currents in PP film on time, electric field (150–670 kV/mm), and temperature (40–120 °C). The results showed that the charging current increased by almost an order of magnitude from 150 kV/mm to 670 kV/mm and exhibits a steep increase with temperature above 80 °C. The discharging currents are about 10 times less than the corresponding charging currents. Carrier mobility varies little with the electric field and becomes slightly larger with an increase in temperature. The quantity of the accumulated charges was calculated by the integral of the charging and discharging current differentials and showed a significant increase with the electric field and temperature. The corresponding electric field distortion becomes larger above 80 °C compared to 20–60 °C. Both electric field and temperature have an important effect on PP film and capacitors based on charge transport and accumulation and their electric field distortion. This study is innovative in that it combines the operating status of DC support capacitors with traditional methods to research synthetically charged transport mechanisms of PP film. The findings are meaningful for understanding the insulation failure mechanisms of PP film and capacitors under complex stresses.

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“…Therefore, the hopping conduction mechanism is reasonable to further analyze the conduction properties [ 26 ]. There is an increasing trend in hopping distances with temperatures [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Section: Electric Field and Temperature Dependence Of Charging Currentsmentioning

confidence: 94%

Section: Electric Field and Temperature Dependence Of Charging Currentsmentioning

confidence: 99%

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The Time, Electric Field, and Temperature Dependence of Charging and Discharging Currents in Polypropylene Films

et al. 2023

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“…On a separate level, Ochiai [67] and Zheng [68] extended the study of polypropylene to extremely thin substrates: the former studied 6-8 nm thick PP evaporated on glass at fields of up to 1200 V/µm, and the latter worked with 140 nm films obtained by high-temperature spin coating and subsequent annealing, tested up to 550 V/µm. In both cases, hopping was identified as the dominating conduction mechanism, at least in a certain range of electric field, with tunneling becoming a better fit at the highest electric fields.…”

Section: Review Of Published Datamentioning

confidence: 99%

Electrical Conduction in Thin-Film Polypropylene Capacitors

Michelazzi,

Fabiani

2023

Energies

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Thin polypropylene films have played a strategic role in recent years because they are the dielectric of choice for high-energy-density and high-power-density DC-link capacitors, and have been extensively used in renewable energy and electric mobility applications. Currently, these capacitors operate at temperatures of up to 105 °C with electric fields of up to 200 V/µm, allowing high efficiency due to their low dissipation figures compared to other capacitor technologies. The rapid evolution of green energy applications demands higher energy and power density, with expected operating temperatures and electric fields of up to 115 °C and above 250 V/µm, respectively. Under such conditions, the insulation resistance of the capacitor becomes a key factor, as it may start to contribute to the dissipation of energy. A correct understanding of conduction phenomena within the dielectric is necessary for the design of new high-performance capacitors based on polypropylene film with reduced conduction losses. The scope of this review is to present and evaluate the theoretical and experimental works on thin biaxially oriented polypropylene (BOPP) films for capacitor applications with a focus on electrical conductivity at high electric field and temperature.

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Direct probing of the effective surface layer thickness during surface electrical breakdown along the solid dielectric and gas interface

Zhang

et al. 2019

Applied Surface Science

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Carrier hopping transport in semi-crystalline isotactic polypropylene thin films: A revisit to the overestimated hopping distance

Cited by 6 publications

References 47 publications

The Time, Electric Field, and Temperature Dependence of Charging and Discharging Currents in Polypropylene Films

The Time, Electric Field, and Temperature Dependence of Charging and Discharging Currents in Polypropylene Films

Electrical Conduction in Thin-Film Polypropylene Capacitors

Direct probing of the effective surface layer thickness during surface electrical breakdown along the solid dielectric and gas interface

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