Multi-layer MgF2/ITO coatings for electromagnetic interference shielding

Khan, Abdul Faheem; Abadeen, Zain ul; Hanif, Muhammad Bilal; Saleem, Muhammad; Naveed, Kashif; Bashir, Khalid; Ahmad, Ishaq

doi:10.1016/j.matchemphys.2021.125009

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…A decrease in E BG was observed after annealing at 300 • C (E BG ~3.24 eV HfO 2 ; E BG ~2.07 eV V 2 O 5 ). This decrease may be attributed to a decrease in defect density, a decrease in residual stresses generated during deposition and structural modifications [22]. At 400 • C, the increase in E BG was observed, with a continuous decrease in band gap of V 2 O 5 (E BG ~3.51 eV HfO 2 ; E BG ~1.94 eV V 2 O 5 ).…”

Section: Resultsmentioning

confidence: 95%

Intrinsic Properties and Future Perspective of HfO2/V2O5/HfO2 Multi-Layer Thin Films via E-Beam Evaporation as a Transparent Heat Mirror

et al. 2022

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HfO2 and V2O5 as multi-layer thin films are discussed for their potential use as transparent heat mirrors. Multi-layered HfO2/V2O5/HfO2 thin films with a thickness of 100/60/100 nm were prepared via e-beam evaporation on a soda–lime glass substrate. Rutherford backscattering confirmed the multi-layer structure with uniform surface. The as-deposited thin films were annealed at 300 °C and 400 °C, respectively, for 1 h in air. The transmittance of approximately 90% was obtained for all thin films. Due to the relatively low thickness and non-stoichiometry of HfO2, a band gap of approximately 3.25 eV was determined (instead of the theoretical 5.3–5.7 eV). The as-deposited thin films possessed conductivity of approximately 0.2 Ω−1cm−1 and increased to 1 Ω−1cm−1 and 2 Ω−1cm−1 for thin films annealed at 300 and 400 °C, respectively. Due to the unique intrinsic properties of HfO2/V2O5/HfO2 thin films, the results obtained are promising for application as a transparent heat mirror.

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Section: Resultsmentioning

confidence: 95%

Intrinsic Properties and Future Perspective of HfO2/V2O5/HfO2 Multi-Layer Thin Films via E-Beam Evaporation as a Transparent Heat Mirror

et al. 2022

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“…Indium tin oxide (ITO)-based nanocomposite, as a wellestablished transparent EMI shielding material, has a wide variety of applications; however, their use is restricted by indium limited availability and brittleness. [93] Metal-based nanowires with high aspect ratios, such as AgNWs, offer a viable alternative to ITO nanocomposites. [94] In contrast to ITO, AgNWs exhibit favorable optoelectronic characteristics and excel in their ability to be fabricated through solution-processing methods.…”

Section: Transparent Thin Emi Shieldsmentioning

confidence: 99%

Structural Design for EMI Shielding: From Underlying Mechanisms to Common Pitfalls

Isari,

Ghaffarkhah,

Hashemi

et al. 2024

Advanced Materials

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Modern human civilization deeply relies on the rapid advancement of cutting‐edge electronic systems that have revolutionized communication, education, aviation, and entertainment. However, the electromagnetic interference (EMI) generated by digital systems poses a significant threat to our society, potentially leading to a future crisis. While numerous efforts have been made to develop nanotechnological shielding systems to mitigate the detrimental effects of EMI, there has been limited focus on creating absorption‐dominant shielding solutions. Achieving absorption‐dominant EMI shields requires careful structural design engineering, starting from the smallest components and considering the most effective electromagnetic wave (EMW) attenuating factors. This review offers a comprehensive overview of shielding structures, emphasizing the critical elements of absorption‐dominant shielding design, shielding mechanisms, limitations of both traditional and nanotechnological EMI shields, and common misconceptions about the foundational principles of EMI shielding science. This systematic review serves as a scientific guide for designing shielding structures that prioritize absorption, highlighting an often‐overlooked aspect of shielding science.This article is protected by copyright. All rights reserved

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“…At present, the most common infrared shielding materials are indium tin oxide (ITO) and antimony tin oxide (ATO), which can effectively block the near-infrared spectrum [ 13 , 14 , 15 , 16 ]. Khan et al [ 17 ] prepared a multilayer nano-MgF 2 /ITO coating via electron beam evaporation. The composite coating has good infrared shielding ability, and its visible light transmittance can reach 90%.…”

Section: Introductionmentioning

confidence: 99%

Preparation of UV-Curable Nano-WO3Coating and Its Infrared Shielding Properties

et al. 2022

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Nano-WO3 particles are expected to find use in new shielding materials because of their significant absorption of near-infrared light in the 1400–1600 nm and 1900–2200 nm bands and high transmittance of visible light. In this study, WO3 was ground and dispersed using high-energy ball-milling to prepare a nano-WO3 dispersion using BYK331 as the dispersant and ethanol as the solvent. The prepared nano-WO3 dispersion was added to a photo-curing system and cured using UV irradiation to form films. The cured films were characterized using FT-IR, SEM, XRD, and TGA. The results showed that the nano-WO3 powder was evenly dispersed in the coating. The infrared blocking rate of the film continuously improved and the visible light transmission rate continuously decreased with increasing amounts of nano-WO3.For the film containing 6 wt%nano-WO3, the infrared blocking rate of the coating is 90%, the visible light transmittance is 70%, the hardness of the coating is 3B, and the adhesion is 3H. The thermal stability of the coating is also improved.

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Multi-layer MgF2/ITO coatings for electromagnetic interference shielding

Cited by 6 publications

References 36 publications

Intrinsic Properties and Future Perspective of HfO2/V2O5/HfO2 Multi-Layer Thin Films via E-Beam Evaporation as a Transparent Heat Mirror

Intrinsic Properties and Future Perspective of HfO2/V2O5/HfO2 Multi-Layer Thin Films via E-Beam Evaporation as a Transparent Heat Mirror

Structural Design for EMI Shielding: From Underlying Mechanisms to Common Pitfalls

Preparation of UV-Curable Nano-WO3Coating and Its Infrared Shielding Properties

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