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Coatings
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Antireflective Coatings for Glass and Transparent Polymers
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Antireflective Coatings for Glass and Transparent Polymers

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

Deadline for manuscript submissions: closed (31 May 2017) | Viewed by 36719

Special Issue Editor

Dr. Pascal Buskens

E-Mail Website1 Website2
Guest Editor
1. Principal Scientist Colloids & Interfaces, The Netherlands Organisation for Applied Scientific Research (TNO), De Rondom 1, 5612 AP, Eindhoven, The Netherlands
2. Research group leader, DWI – Leibniz Institute for Interactive Materials e.V., RWTH Aachen University, Forckenbeckstrasse 50, 52056 Aachen, Germany
Interests: nanoparticles; functional coatings; optical materials

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to this Special Issue, “Antireflective Coatings for Glass and Transparent Polymers”. Antireflective coatings are applied to reduce surface reflections and increase the transmission of visible and near-infrared light through transparent substrates, such as glass, polyethylene teraphthtalate, poly(methyl metahacrylate), and polycarbonate. They are of interest for a large variety of applications ranging from picture and art glazing to photovoltaic covers and eye glasses. Antireflective coatings are typically multi-layer interference coatings, graded index layers or quarter-wave low-refractive index coatings. In spite of the maturity of this field of research, important questions still remain unanswered, e.g., what is the optimum distribution and arrangement of pores in a quarter wave coating for balancing the optical and mechanical performance, can one combine the antireflective property with other useful functionalities like dust-repellence or light diffusion in one single coating, how do antireflective coatings perform in specific applications (including ageing behaviour), and is it possible to develop antireflective coatings that adapt to specific changes in the environment. The aim of this Special Issue is to present the latest developments in the field that address these and other important research questions through a combination of original research papers and review articles from leading groups around the world.

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

  • Nanoporous antireflective coatings;
  • Nanocomposite antireflective coatings;
  • Multifunctional antireflective coatings;
  • Performance of antireflective coatings in specific applications (including ageing), e.g., on photovoltaic covers and greenhouses;
  • Antireflective coatings that adapt to specific changes in the environment.

Dr. Pascal Buskens
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 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 (4 papers)

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Research

7212 KiB  
Article
Design of Nano-Porous Multilayer Antireflective Coatings
by Joel Yi Yang Loh and Nazir Kherani
Coatings 2017, 7(9), 134; https://doi.org/10.3390/coatings7090134 - 26 Aug 2017
Cited by 11 | Viewed by 5901
Abstract
We present an overview of the design potential of nano-porous anti-reflection coatings (ARCs) and the associated challenges in its fabrication. Genetic algorithm optimization for the most effective ARCs on glass for normal and all incident angles is carried out and an admittance loci-based [...] Read more.
We present an overview of the design potential of nano-porous anti-reflection coatings (ARCs) and the associated challenges in its fabrication. Genetic algorithm optimization for the most effective ARCs on glass for normal and all incident angles is carried out and an admittance loci-based pictorial is used to visualize their performance. We then describe the advantages of using nano-porous multi-layers vis-à-vis other types of moth-eye type nano-grating films: Principally trading high performance and high cost of fabrication for good performance and lower cost facile synthesis. We describe some of the issues involved in the fabrication of such multi-layer stacks on glass and polymeric substrates and provide suggestions for overcoming these limitations. Full article
(This article belongs to the Special Issue Antireflective Coatings for Glass and Transparent Polymers)
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9288 KiB  
Article
Antireflection Coatings for Strongly Curved Glass Lenses by Atomic Layer Deposition
by Kristin Pfeiffer, Ulrike Schulz, Andreas Tünnermann and Adriana Szeghalmi
Coatings 2017, 7(8), 118; https://doi.org/10.3390/coatings7080118 - 09 Aug 2017
Cited by 63 | Viewed by 19914
Abstract
Antireflection (AR) coatings are indispensable in numerous optical applications and are increasingly demanded on highly curved optical components. In this work, optical thin films of SiO2, Al2O3, TiO2 and Ta2O5 were prepared by [...] Read more.
Antireflection (AR) coatings are indispensable in numerous optical applications and are increasingly demanded on highly curved optical components. In this work, optical thin films of SiO2, Al2O3, TiO2 and Ta2O5 were prepared by atomic layer deposition (ALD), which is based on self-limiting surface reactions leading to a uniform film thickness on arbitrarily shaped surfaces. Al2O3/TiO2/SiO2 and Al2O3/Ta2O5/SiO2 AR coatings were successfully applied in the 400–750 nm and 400–700 nm spectral range, respectively. Less than 0.6% reflectance with an average of 0.3% has been measured on a fused silica hemispherical (half-ball) lens with 4 mm diameter along the entire lens surface at 0° angle of incidence. The reflectance on a large B270 aspherical lens with height of 25 mm and diameter of 50 mm decreased to less than 1% with an average reflectance < 0.3%. The results demonstrate that ALD is a promising technology for deposition of uniform optical layers on strongly curved lenses without complex in situ thickness monitoring. Full article
(This article belongs to the Special Issue Antireflective Coatings for Glass and Transparent Polymers)
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7625 KiB  
Article
Ultra-Low Reflectivity Anti-Reflection Coating on a Plastic Cover Slip in Liquid for He-Ne Laser Light
by Jin-Cherng Hsu, Heng-Ying Cho, Tsang-Yen Hsieh and Jyh-Liang Wang
Coatings 2017, 7(7), 89; https://doi.org/10.3390/coatings7070089 - 29 Jun 2017
Viewed by 5703
Abstract
An ultra-low anti-reflection optical coating on both surfaces of a plastic cover slip was studied for use in confocal image measurements. The optical reflectance at a wavelength of 632.8 nm was less than 0.1% when the coated sample was placed in a liquid [...] Read more.
An ultra-low anti-reflection optical coating on both surfaces of a plastic cover slip was studied for use in confocal image measurements. The optical reflectance at a wavelength of 632.8 nm was less than 0.1% when the coated sample was placed in a liquid having a refractive index of 1.34, close to the aqueous solution of the biomaterial. The high- and low-index coating films, Substance-2 (PrTiO3) and silicon dioxide (SiO2), were measured by an ellipsometer to determine their optical refraction indices and extinction coefficients. Theoretically, when the two layer thicknesses are designed using the optical admittance diagram of the cover slip to approach the equivalent index of 1.34, a reflectance of 1.6 × 10−5% in the liquid could be obtained. Experimentally, the reflectance of the sample deposited on the two faces of the cover slip was 4.223 ± 0.145% as measured in the air; and 0.050 ± 0.002% as measured by a He-Ne laser in the liquid. Full article
(This article belongs to the Special Issue Antireflective Coatings for Glass and Transparent Polymers)
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4463 KiB  
Article
Fabrication of Luminescent Antireflective Coatings with CaMoO4:Eu3+/Ag Composite Structure
by Kazuhiro Matsumoto, Manabu Hagiwara and Shinobu Fujihara
Coatings 2017, 7(6), 74; https://doi.org/10.3390/coatings7060074 - 02 Jun 2017
Cited by 3 | Viewed by 4490
Abstract
Highly transparent and luminescent CaMoO4:Eu3+/Ag composite films were fabricated on glass substrates as multifunctional antireflective (AR) coatings. The films were deposited through a combination of a sol–gel dip-coating technique and a hot water treatment. With the addition of an [...] Read more.
Highly transparent and luminescent CaMoO4:Eu3+/Ag composite films were fabricated on glass substrates as multifunctional antireflective (AR) coatings. The films were deposited through a combination of a sol–gel dip-coating technique and a hot water treatment. With the addition of an aluminum source in coating solutions, the sol–gel-derived films underwent a remarkable microstructural change during the hot water treatment due to the reaction between an amorphous alumina phase and water. This change brought both an antireflective effect (suppression of Fresnel reflection) and luminescence enhancement (suppression of total internal reflection) to the films. The introduction of Ag nanoparticles into the films further increased luminescence intensity without losing the antireflective effect. Full article
(This article belongs to the Special Issue Antireflective Coatings for Glass and Transparent Polymers)
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