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Coatings
Special Issues
Advanced Coating Materials for Power Network Equipment
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Advanced Coating Materials for Power Network Equipment

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (31 March 2020) | Viewed by 6093

Special Issue Editors

Prof. Reza Jafari

E-Mail Website
Guest Editor
Department of Applied Sciences, Universite du Quebec a Chicoutimi, Chicoutimi, QC, Canada
Interests: superhydrophobicity; water repellency; icephobicity; coating; polymers; biomimetics; micro-nanostructured surfaces; wetting and de-wetting; nanocomposites; polymer processing; chemical modification; smart materials
Special Issues, Collections and Topics in MDPI journals
Prof. Gelareh Momen

E-Mail Website
Guest Editor
Department of Applied Sciences, Universite du Quebec a Chicoutimi, Chicoutimi, QC, Canada
Interests: nanodieletric coating; icephobic coating; surface treatment for high voltage application

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to this Special Issue on “Advanced Coating Materials for Power Network Equipment". Progress made in the field of material science has renewed interest in the development of functional and smart coatings, which can be engineered to provide surfaces with specifies desirable properties. These coatings would provide surfaces that behave more suitably in terms of resistance to corrosion, electrical, mechanical or chemical damages, as well as ice and pollution adhesion. The development of these coatings is worthwhile due to both environmental and economic concerns. The aim of this Special Issue is to present the latest experimental and theoretical developments in the field, through a combination of original research papers and review articles from leading groups around the world.

In particular, topics of interest include, but are not limited to:

  • Nanodieletric coating;
  • Icephobic coating;
  • Protective coating for high voltage equipment;
  • Self-healing coatings;
  • Semi-conductive coatings.

Prof. Reza Jafari
Prof. Gelareh Momen
Guest Editors

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 100 words) can be sent to the Editorial Office for announcement on this website.

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. Coatings 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 2600 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.

Published Papers (1 paper)

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Research

15 pages, 3362 KiB  
Article
Performance Improvement of GaN Based Laser Diode Using Pd/Ni/Au Metallization Ohmic Contact
by Wenjie Wang, Wuze Xie, Zejia Deng, Haojun Yang, Mingle Liao, Junze Li, Xiaojia Luo, Song Sun and Degang Zhao
Coatings 2019, 9(5), 291; https://doi.org/10.3390/coatings9050291 - 28 Apr 2019
Cited by 15 | Viewed by 5792
Abstract
We report an investigation of the effects of different metal systems and surface treatment on the contact performance of GaN lasers. We found that multi-element metal alloy and surface chemical treatment are the keys to achieve good ohmic behavior contacts on GaN laser [...] Read more.
We report an investigation of the effects of different metal systems and surface treatment on the contact performance of GaN lasers. We found that multi-element metal alloy and surface chemical treatment are the keys to achieve good ohmic behavior contacts on GaN laser diodes. Pd/Ni/Au contact demonstrates excellent thermal stability and lowest specific contact resistivity in these metal systems. Properly adjusting the thickness of the Pd and Ni layer and pretreating with the KOH solution can further improve the ohmic contact performance. The improved ohmic behavior of the KOH solution pretreated Pd/Ni/Au contact is attributed to removing surface oxides and the reduction of the schottky barrier heights due to the metal Pd has a high work function and the interfacial reactions occurring between the Pd, Ni, Au, and GaN extends into the GaN film. As a result, a low contact resistivity of 1.66 × 10−5 Ω·cm2 can be achieved from Pd(10 nm)/Ni(10 nm)/Au(30 nm) contacts with KOH solution pretreated on top of the laser diode structure. The power of the GaN based laser diode with the Pd/Ni/Au metallization ohmic contact can be enhanced by 1.95 times and the threshold current decreased by 37% compared to that of the conventional ohmic contact Ni/Au. Full article
(This article belongs to the Special Issue Advanced Coating Materials for Power Network Equipment)
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