Three-Dimensional Mechanistic Modeling of Time-Dependent Dielectric Breakdown in Polycrystalline Thin Films

Zhang, Qingqing; Yu, Lishuai; Bian, Zhengpin; Yuan, Dong; Sun, Hexu; Lu, Xubing; Liu, Feilong; Zhou, Guofu

doi:10.1103/physrevapplied.19.024008

Cited by 2 publications

(2 citation statements)

References 53 publications

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“…The surface approach modifies the surface tension with a term C s V 2 /2 according to the YL eq . , This approach, however, does not directly calculate the spatial distribution of electric field and potential and does not directly consider the dielectric properties of the liquid. Realistically, the electric field distribution, especially that in the dielectric layer beneath the liquid, is crucial for the dielectric reliability. − An additional hybrid calculation is needed for the electrostatics separately from the hydrodynamics, with the obtained electric potential distribution being used to determine the (more accurate) modified interfacial tensions. However, the separate and concurrently running numerical solvers for hydrodynamics and electrostatics make the calculation more computationally expensive.…”

Section: Lattice Boltzmann Modelmentioning

confidence: 99%

Accurate and Wide-Voltage-Range Modeling of Electrowetting with a Lattice Boltzmann Approach

Lei,

Liu,

Zhuang

et al. 2023

Langmuir

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The lattice Boltzmann method (LBM) has been widely used in multi-phase fluid mechanics and is known to be more computationally efficient than the traditional method of numerically solving Navier–Stokes and Cahn–Hilliard equations. Electrowetting is an important component of interfacial sciences, in which the liquid–liquid and solid–liquid interfaces are tuned by electrostatics. Modeling electrowetting using the LBM can be categorized into surface and bulk methods. By modifying the surface tension scalar, the surface method easily reproduces the fundamental Young–Lippmann (YL) equation at low voltages but fails to capture contact angle saturation at high voltages. With fully coupled hydrodynamics and electrostatics in the form of spatially dependent matrices, the bulk method can successfully show contact angle saturation, but it is often unable to reproduce the YL equation due to its intrinsic inaccuracies. The inaccuracies are mainly due to the fact that while the hydrodynamics are all described by continuous physical quantities in the framework of diffusive interfaces, the interfacial electrostatics are governed by discontinuous electric fields caused by sheet charge density. In this paper, we show that accurately modeling electrowetting using the LBM is non-trivial. Additional modeling work, especially the treatment of interfacial electric fields, is needed to recover the fundamental YL equation at low voltages and predict contact angle saturation at high voltages, with a systematic model validation over key parameters and applications.

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Section: Lattice Boltzmann Modelmentioning

confidence: 99%

Accurate and Wide-Voltage-Range Modeling of Electrowetting with a Lattice Boltzmann Approach

Lei,

Liu,

Zhuang

et al. 2023

Langmuir

Self Cite

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“…介电层老化失效的物理机制存在多种可能性 [95] , 表 2 电润湿显示器件常用介电绝缘材料及其性能概况 [87−89] Table 2. Overview of common dielectric materials and their properties used in electrowetting display devices [87−89] .…”

Section: 电介质的老化物理mentioning

confidence: 99%

Research progress of physics of electrowetting display devices

Liu,

Cheng,

Zhang

et al. 2023

Acta Phys. Sin.

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Electrowetting refers to the phenomenon of modifying the surface tension between a liquid and a solid by adjusting the electric potential applied between the liquid and solid electrodes, thereby changing the contact angle between the two and causing deformation and displacement of the droplets. Electrowetting electronic paper display is a new reflective "paper-like" display technology based on rapid response microfluidic control technology. It has the advantages of low energy consumption, visual health, and flexibility of commercial electrophoretic electronic paper display products, while breaking through the bottlenecks of "full-color" and "video-speed response" that currently restrict the application of electronic paper display technology. In this paper, several physical directions involved in electrowetting display devices, especially wetting and electrowetting, binary phase fluid mechanics, microscopic and interfacial physics, photophysics, dielectric physics, thermophysics, and transient physics, are systematically reviewed; A comprehensive introduction was given to the basic principles of device operation, microscopic and mesoscopic physical pictures, internal mechanisms of device operation, and device reliability.

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Three-Dimensional Mechanistic Modeling of Time-Dependent Dielectric Breakdown in Polycrystalline Thin Films

Cited by 2 publications

References 53 publications

Accurate and Wide-Voltage-Range Modeling of Electrowetting with a Lattice Boltzmann Approach

Accurate and Wide-Voltage-Range Modeling of Electrowetting with a Lattice Boltzmann Approach

Research progress of physics of electrowetting display devices

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