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Functional Thin Films Growth and Characterization for Opto-Electronic and Renewable...
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Functional Thin Films Growth and Characterization for Opto-Electronic and Renewable Energies Applications

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 4572

Special Issue Editor

Dr. Barbara Vercelli

E-Mail Website
Guest Editor
Institute of Condensed Matter Chemistry and Technologies for Energy, National Research Council, CNR-ICMATE, Via Cozzi, 53-20125 Milan, Italy
Interests: material science; nanotechnology; self-assembly; thin films; conducting polymers; electrochemistry; nanoparticles synthesis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Device performances in renewable energies and optoelectronic technologies depend on the properties of each component material. Thin films’ and coatings’ thickness. Thus, the operating conditions and performance of a specific device are influenced by the functionalities of specific thin films. A material’s growth and organization in a thin-layered structure impact its resultant properties, and thus are of paramount importance in designing and optimizing the final device.

In light of the above considerations, the present Special Issue invites scholars to share their most recent findings on the growth and characterization of functional thin films, based on inorganic, organic, hybrid metallic, and semiconducting materials. A particular focus on their application in devices for renewable energies and optoelectronic technologies is encouraged. The purpose of this Special Issue is to gather the latest results in experimental and theoretical investigations on thin films exhibiting epitaxial, polycrystalline, or amorphous characteristics. Studies of surfaces, interfaces, and subsurface modification, nanostructures, and bulk materials over-deposited with thin films or with surface modifications are also encouraged.

Topics of interest include, but are not limited to:

  • Synthesis and characterization: new concepts and techniques for thin-film fabrication, modification, processing, and characterization;
  • Electronics, optics, and optoelectronics: thin films for electronic, optical, and optoelectronic applications;
  • Energy materials: thin films for energy materials;
  • Thin film devices: fabrication, processing, and properties of thin-film devices for application in renewable energies and optoelectronic technologies.

Submissions of reviews, mini-reviews, original articles, and short communications highlighting the potential of functional thin films to improve optoelectronic and renewable energies applications are kindly encouraged.

Dr. Barbara Vercelli
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

12 pages, 1689 KiB  
Article
Modelling the Impact of Graphene Coating of Different Thicknesses on Polyimide Substrate on the Secondary Electron Yield
by Xin Qi, Yanzhao Ma, Sisheng Liu, Xiangyu Nie, Tao Zhang, Yong Wu, Weiping Peng and Guoming Hu
Coatings 2024, 14(1), 13; https://doi.org/10.3390/coatings14010013 - 21 Dec 2023
Cited by 1 | Viewed by 830
Abstract
Polyimide material is widely used in the aerospace field, but its secondary electron emission yield is high. In this study, a graphene coating was used to suppress its secondary electron emission, and the secondary electron emission yield of graphene-coated materials with different thicknesses [...] Read more.
Polyimide material is widely used in the aerospace field, but its secondary electron emission yield is high. In this study, a graphene coating was used to suppress its secondary electron emission, and the secondary electron emission yield of graphene-coated materials with different thicknesses was calculated using the GEANT4 numerical simulation method. The suppression effect of different thicknesses of graphene coatings on the secondary electron emission was analyzed. The simulation results showed that the optimal graphene coating thicknesses for the lowest secondary electron yield of polyimide materials were 1 nm and 5 nm, which reduced the secondary electron emission yield by 13% in terms of simulation. The 5 nm graphene coating reduced the secondary electron emission yield by 6% compared to the polyimide material from an experimental perspective. The 5 nm coating showed better results at higher energies and was experimentally verified by preparing five layers of graphene coating, which showed good agreement between the simulation and experiment. Meanwhile, with the increase in graphene coating thickness, the surface secondary electron emission displacement range decreased, and the secondary electrons produced at the surface were of low energy. The results of this study can provide technical reference for polyimide in aerospace applications and secondary electron emission simulation. Full article
(This article belongs to the Special Issue Functional Thin Films Growth and Characterization for Opto-Electronic and Renewable Energies Applications)
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12 pages, 12617 KiB  
Article
Electrochemical Properties of Carbon Nanobeads and Mesophase-Pitch-Based Graphite Fibers as Anodes for Rechargeable Lithium-Ion Batteries
by Liyong Wang, Tiantian Liu, Shengsheng Ji, Shiwen Yang, Huiqi Wang and Jinhua Yang
Coatings 2023, 13(10), 1671; https://doi.org/10.3390/coatings13101671 - 24 Sep 2023
Viewed by 874
Abstract
Various strategies have been devised to enhance the specific capacity (over 372 mA h g−1) and the cycle life of pure carbon-based anode materials for lithium-ion batteries (LIBs). Herein, we have prepared carbon nanobeads (CNBs) with inner onion-like carbon layer structures [...] Read more.
Various strategies have been devised to enhance the specific capacity (over 372 mA h g−1) and the cycle life of pure carbon-based anode materials for lithium-ion batteries (LIBs). Herein, we have prepared carbon nanobeads (CNBs) with inner onion-like carbon layer structures using chemical vapor deposition. Additionally, mesophase-pitch-based graphite fibers (MPGFs) were fabricated via the melt spinning method. MPGFs had a reversible capacity of 328.2 mA h g−1 with a steady Coulombic efficiency after 105 cycles (at 0.05 mA g−1). When cycled at 0.2 A g−1, the CNBs kept a reversible capacity of 586.2 mA h g−1 after 256 cycles with stable Coulombic efficiency. The onion-like carbon layer structures of CNBs were beneficial to the storage of lithium ions. In this work, CNBs were fabricated with inner onion-like carbon layer structures to enhance the electrochemical performance of LIBs. Full article
(This article belongs to the Special Issue Functional Thin Films Growth and Characterization for Opto-Electronic and Renewable Energies Applications)
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13 pages, 4795 KiB  
Article
Effect of ZrH2 Doping on Electron Emission Performance of Rare Earth Tungsten Electrode
by Shaoxin Zhou, Yingchao Zhang, Shangshang Liang, Jiancan Yang and Zuoren Nie
Coatings 2023, 13(4), 666; https://doi.org/10.3390/coatings13040666 - 23 Mar 2023
Cited by 1 | Viewed by 1163
Abstract
In order to explore the effect of ZrH2 on the electron emission performance of rare earth tungsten electrodes (W-La-Y), different proportions of ZrH2 were added to rare earth tungsten in this study, and samples of three proportions were obtained by ball [...] Read more.
In order to explore the effect of ZrH2 on the electron emission performance of rare earth tungsten electrodes (W-La-Y), different proportions of ZrH2 were added to rare earth tungsten in this study, and samples of three proportions were obtained by ball milling and vacuum hot-pressing sintering. The electron emission performance, phase evolution and surface valence state of the samples were analyzed, respectively. The test results of electrode emission performance show that increasing the mass fraction of ZrH2 in the range of 0% to 0.1% can continuously improve the electrode emission performance. At 1600 °C, 0.1% ZrH2 can increase the zero-field current emission density from 0.36 to 0.90 A/cm2. X-ray diffraction (XRD), the comprehensive thermalgravimetric and differential thermal analysis (TG-DTA) and X-ray photoelectron spectroscopy (XPS) results showed that the ZH2 added to rare earth tungsten electrodes would react with impurity oxygen in the electrode and consume impurity oxygen, thus reducing the inhibitory effect of impurity oxygen on the electron emission of the electrode and improving its electron emission performance. Full article
(This article belongs to the Special Issue Functional Thin Films Growth and Characterization for Opto-Electronic and Renewable Energies Applications)
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13 pages, 3639 KiB  
Article
Electrohydrodynamic Printing of PCL@CsPbBr3 Composite Fibers with High Luminescence for Flexible Displays
by Maolin Liu, Changqing Lin, Weicheng Ou, Han Wang, Chunyang Pan, Yuchen Ji and Hehui Zheng
Coatings 2023, 13(3), 500; https://doi.org/10.3390/coatings13030500 - 24 Feb 2023
Cited by 1 | Viewed by 1233
Abstract
Metal halide perovskite quantum dots (PQDs) are widely used in the display field due to their excellent photoelectric properties, such as ultra-narrow half-peak widths and ultra-pure luminescence color purity. Inkjet printing, laser direct writing and electrospinning are all common methods for PQDs printing [...] Read more.
Metal halide perovskite quantum dots (PQDs) are widely used in the display field due to their excellent photoelectric properties, such as ultra-narrow half-peak widths and ultra-pure luminescence color purity. Inkjet printing, laser direct writing and electrospinning are all common methods for PQDs printing to prepare micropattern displays. In order to produce large-scale and high-resolution PQDs micropatterns, electrohydrodynamic (EHD) printing technology is capable of large-scale deposition of highly oriented nanofibers on rigid or pliable, flat or bent substrates with the advantages of real-time regulation and single control. Therefore, it has a lot of potential in the fabrication of pliable electronic devices for one-dimensional ordered light-emitting fibers. Polycaprolactone (PCL) as an EHD printing technology polymer material has the advantages of superior biocompatibility, a low melting point, saving energy and easy degradation. By synthesizing CsPbBr3 quantum dots (QDs) and PCL composite spinning stock solution, we used the self-built EHD printing platform to prepare the PCL@CsPbBr3 composite light-emitting optical fiber and realized the flexible display of high-resolution micropatterns in polydimethylsiloxane (PDMS) packaging. An x-ray diffractometer (XRD), scanning electron microscope (SEM) and photoluminescence (PL) were used to characterize and analyze the fiber’s morphology, phase and spectral characteristics. EHD printing technology may open up interesting possibilities for flexible display applications based on metal halide PQDs. Full article
(This article belongs to the Special Issue Functional Thin Films Growth and Characterization for Opto-Electronic and Renewable Energies Applications)
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