A novel method for distribution of trap levels in dielectric by photo-stimulated discharge

Zhu, Zhien; Zhang, Yewen; An, Zhenlian; Zheng, Feihu

doi:10.1109/icsd.2010.5568035

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…To understand how charge trapping influences the output performance of the TENGs, an isothermal surface potential decay (ISPD) model − was employed to calculate the trap distribution characteristics of each dielectric layer. This method is based on measuring the decay behavior of the dielectric layer’s surface charges under isothermal conditions, − as illustrated in Figure c.…”

Section: Resultsmentioning

confidence: 99%

Trap Distribution and Conductivity Synergic Optimization of High-Performance Triboelectric Nanogenerators for Self-Powered Devices

Zhang

Huang

et al. 2021

ACS Appl. Mater. Interfaces

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Exploring effective methods of increasing the triboelectric charge density of tribo-materials to boost the output performance of triboelectric nanogenerators (TENGs) is crucial for expanding their practical applicability in modern smart devices. This study discusses the incorporation of various polymeric dielectric layers between the tribo-material and electrode components of TENGs, which improved their electrical output performance to varying degrees. The TENG demonstrating the largest improvement (1200 V) was obtained after adding a polyimide layer. The analysis presented herein suggests that incorporating a dielectric layer with high trap energy means that more charges are held in deep traps; thus, such TENGs demonstrate the best electrical performance. Additionally, when a dielectric layer is added to the triboelectric material, the enhanced TENG output is related to the volume conductivity of the triboelectric material, but not to its electronegativity or surface structure. Finally, the optimized TENG developed in this work demonstrates energy harvesting capabilities and can function as a self-powered sensor applied in an intelligent housing system and as an emergency fall detection/alert system for the elderly and the sick.

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Section: Resultsmentioning

confidence: 99%

Trap Distribution and Conductivity Synergic Optimization of High-Performance Triboelectric Nanogenerators for Self-Powered Devices

Zhang

Huang

et al. 2021

ACS Appl. Mater. Interfaces

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“…In the experiment, the needle electrode is used to generate the air corona ionization, and the ionized charges are injected into the surface of the film by setting the voltage of the charging electrode and the grid plate electrode. 21 After the charging of the film is completed, the surface trap charges will struggle against the trap centers and migrate to the ground electrode, causing surface potential decay. The temperature is 25 °C, the humidity is 45%, the applied voltage time is 300 s, the decay time is 2 × 10 4 s, voltages of the charging electrode and the grid plate electrode are set to −10 kV and −5 kV respectively.…”

Section: Experimental Methodsmentioning

confidence: 99%

Space Charge and Trap Distributions and Charge Dynamic Migration Characteristics in Polypropylene under Strong Electric Field

Xing

et al. 2022

ECS J. Solid State Sci. Technol.

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Space charge accumulation in polypropylene will accelerate aging of the material and lead to the degradation of its insulation performance. Here, space charge distribution, current conduction characteristics, thermally stimulated depolarization current (TSDC), and surface potential decay (SPD) characteristics of polypropylene (PP) under a strong electric field were measured and analyzed, and the bulk trap and surface trap parameters were extracted. Further, the charge dynamic transport physical processes and characteristics under strong electric field were studied. Experimental results show that the charge accumulation amount in PP under the action of a negative polarity electric field is higher than that of a positive polarity electric field, by about one order of magnitude. There are two obvious charge density peaks on the PP surface, which are 2.60 and 3.66×1020·eV -1 ·m -3 V. The simulation results show that with the extension of the applied voltage time, the injected charges by the electrode gradually migrate to the bulk of the material and eventually the positive and negative charges are offset at the middle position. The local electric field caused by the accumulation of interfacial charges will weaken the original electric field, resulting in the distortion of the internal electric field.

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Study of trap levels by photo-stimulated discharge for nano-powder doping low density polyethylene

Zhu

Zhang

et al. 2011

2011 - 14th International Symposium on Electrets

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A novel method for distribution of trap levels in dielectric by photo-stimulated discharge

Cited by 5 publications

References 12 publications

Trap Distribution and Conductivity Synergic Optimization of High-Performance Triboelectric Nanogenerators for Self-Powered Devices

Trap Distribution and Conductivity Synergic Optimization of High-Performance Triboelectric Nanogenerators for Self-Powered Devices

Space Charge and Trap Distributions and Charge Dynamic Migration Characteristics in Polypropylene under Strong Electric Field

Study of trap levels by photo-stimulated discharge for nano-powder doping low density polyethylene

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