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Micromachines
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Advances in Optoelectronic Devices, 3rd Edition
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Advances in Optoelectronic Devices, 3rd Edition

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "E：Engineering and Technology".

Deadline for manuscript submissions: 30 September 2026 | Viewed by 640

Special Issue Editor

Prof. Dr. Zichuan Yi

E-Mail Website
Guest Editor
School of electronic information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China
Interests: photoelectric display; device integration; system driver
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Optoelectronic devices are an important part of the development of science and technology. They play an indispensable role in the progress of society and industry. To date, optoelectronic devices have been widely used in various fields, such as optical displays, organic solar cells, laser cutting, sensors, etc. In order to adapt them to more application scenarios, there are still many research tasks that need to be carried out to improve the performance of optoelectronic devices. For example, the conversion efficiency of optical displays and solar cells can be improved by optimizing the physical model of optoelectronic devices. In addition, it is also of great significance to study new optoelectronic devices and new application scenarios for them, which may further improve living standards. We would like to invite you to contribute to this Special Issue through research articles or comments for introducing the latest progress in the field of optoelectronic devices, with special emphasis on research in displays, optoelectronic sensors, solar devices, lasers, etc. Contributions may focus on the following: device simulation, new material research, device preparation, performance improvement, system integration, and new applications.

Prof. Dr. Zichuan Yi
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • displays
  • optoelectronic sensors
  • organic solar cell
  • lasers
  • device simulation
  • new optoelectronic materials
  • device preparation
  • performance improvement
  • system integration
  • new optoelectronic applications

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Published Papers (1 paper)

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Research

15 pages, 2135 KB  
Article
An Electrohydrodynamic Phase-Field Model for Contact Angle Hysteresis in Electrowetting Pixels: Decoupling Physical Pinning and Charge Trapping
by Qingsong Lu, Li Wang, Feng Li, Yanjun Yang, Qifu Liu, Xinying Wang, Feng Chi, Liming Liu and Zichuan Yi
Micromachines 2026, 17(4), 480; https://doi.org/10.3390/mi17040480 - 15 Apr 2026
Viewed by 408
Abstract
Precise manipulation of two-phase flow in micro-confined electrowetting pixels is limited by contact angle hysteresis (CAH). To elucidate this non-equilibrium process, we establish a high-fidelity electrohydrodynamic (EHD) phase-field simulation framework. The model rigorously couples Navier–Stokes equations with molecular kinetic theory (MKT) to characterize [...] Read more.
Precise manipulation of two-phase flow in micro-confined electrowetting pixels is limited by contact angle hysteresis (CAH). To elucidate this non-equilibrium process, we establish a high-fidelity electrohydrodynamic (EHD) phase-field simulation framework. The model rigorously couples Navier–Stokes equations with molecular kinetic theory (MKT) to characterize energy dissipation at the three-phase contact line (TCL) and further integrates charge transport kinetics. Numerical results reveal CAH is driven by physical pinning and interfacial charge trapping, with the latter dominating interfacial retreat and causing significant residual displacement. Furthermore, analysis shows alternating current (AC) waveforms mitigate charge accumulation and promote depinning via micro-oscillations, minimizing the hysteresis loop compared to direct current (DC) waveforms. Additionally, an overdrive strategy utilizing a suprathreshold Maxwell stress pulse rapidly overcomes static friction. This strategy significantly improves transient dynamics, substantially reducing the time to reach 90% of the steady-state target from 19.6 ms (under standard DC waveform driving) to 7.4 ms. This work provides a comprehensive theoretical basis and design criteria for optimizing active driving strategies in optofluidic and digital microfluidic systems. Full article
(This article belongs to the Special Issue Advances in Optoelectronic Devices, 3rd Edition)
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