VO2 thin films fabricated by reduction of thermal evaporated V2O5 under N2 flow

Manousou, Dimitra K.; Gardelis, S.; Calamiotou, M.; Syskakis, E.

doi:10.1016/j.matlet.2021.130086

Cited by 11 publications

(3 citation statements)

References 26 publications

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“…Reduction of V 2 O 5 films to VO 2 : Reduction of V 2 O 5 in H 2 gas (Manousou et al, 2021) (Pósa et al, 2021;Kumi-Barimah et al, 2020). Preparing VO 2 by magnetron sputtering using V 2 O 5 target with in situ annealing (Ho et al, 2019) or Thermal Evaporation of the V 2 O 5 (Manousou et al, 2021) had been proposed.…”

Section: Deposition Methodsmentioning

confidence: 99%

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

et al. 2022

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It is surprising to see the wide range and versatile potential of applications of the VO2, due to its transition from a semiconductor phase at low temperature, to a metallic state at high temperature. Although this transition’s atomic mechanism is not yet well understood, the tuneability is very reproducible experimentally and can be monitored by various triggering schemes, not only by heating/cooling but also by applying a voltage, pressure, or high power single fast photonic pulse. Many of the recent applications use not only the low-temperature phase and the high-temperature phase, but also the transition slope to monitor a specific parameter. The paper starts with a summary of the VO2 thin film deposition methods and a table presenting its recent proposed applications, some of which our team had worked on. Then the development characterization and application of the VO2 as a smart thermal radiator is provided along with the recent progress. The experimental results of the emissivity were measured at low temperature and high temperature, as well as during the transition in vacuum based on the thermal power balance. These measurements were compared with those deduced from an average of Infrared Reflectance (2–30 µm) weighed with the blackbody reflection spectrum. The roadmap is to try alternatives of the multilayers in order to increase the emissivity tuneability, increase the device dimensions, have an easier application on space surfaces, while lowering cost.

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Section: Deposition Methodsmentioning

confidence: 99%

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

et al. 2022

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“…Various techniques have been investigated for the synthesis of high-purity VO 2 (M), including chemical vapor deposition (CVD), [32][33][34] magnetron sputtering, [35,36] hydrothermal methods, [37][38][39] physical vapor deposition, [40,41] thermolysis, [42,43] and sol-gel techniques. [44,45] Each method produces VO 2 with distinct sizes and morphologies.…”

Section: Adjust the Particles Sizementioning

confidence: 99%

Strategies for Enhanced Optical Performance and Durability of VO₂‐Based Thermochromic Windows

Alsaadi,

Lerttraikul,

Chatraphorn

et al. 2024

Adv Eng Mater

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Due to the growing need for smart windows for buildings to reduce energy usage, vanadium dioxide (VO2) has been investigated as a potential material for thermochromic smart windows due to its ease of implementation and simplicity in industrial production. VO2 undergoes a reversible phase shift from a monoclinic (M, P21/c) semiconductor to a rutile (R, P42/mnm) metal at a critical temperature of 68 °C. This transition is accompanied by acute variations in IR reflectance, transmittance, and electrical resistance. Despite substantial developments in thermochromic materials, their optical and transition properties are still unsatisfactory. In the past several decades, many methods for enhancing optical properties have been reported, including composite films, multilayer structures, and element doping. Recent developments in thermochromic smart windows to improve both optical properties and durability have been surveyed in this review. Additionally, future growth trends have been provided by the possibility of commercially manufacturing VO2 smart windows.This article is protected by copyright. All rights reserved.

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“…Below 68 • C, it is a monoclinic semiconductor, while above 68 • C, it becomes a tetragonal conductor. Near the critical point, the electrical and optical properties of VO 2 change by 2-5 orders of magnitude, and the infrared transmittance can change by 40-60% [1][2][3][4]. Therefore, VO 2 has garnered considerable research attention for preparing smart windows [5,6], optical switches [7], biomedical sensors [8], relaxation oscillator [9], and so on.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Optical Characterization of VO2-Based Thin Films Deposited on Practical Float Glass by Magnetron Sputtering and Professional Annealing

et al. 2022

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In this paper, VO2 thin films with good optical properties are fabricated on practical float glass by magnetron sputtering and a professional annealing method. The near-infrared switching efficiency (NIRSE) of the prepared film reaches 39% (@2000 nm), and its near-infrared energy modulation ability (ΔTir) reaches 10.9% (780–2500 nm). Further, the highest integral visible transmittance Tlum is 63%. The proposed method exhibits good reproducibility and does not cause any heat damage to the magnetron sputtering machine. The crystalline structure of the VO2 film is characterized by X-ray diffraction (XRD). The lattice planes (011) and (−211) grow preferentially (JCPDS 65-2358), and a large number of NaV2O5 crystals are detected simultaneously. The microstructures are characterized by scanning electron microscopy (SEM), and a large number of long sheet crystals are identified. The phase transition temperature is significantly reduced by an appropriate W doping concentration (Tc = 29 °C), whereas excessive W doping causes distortion of the thermal hysteresis loop and a reduction in the NIRSE. Oxygen vacancies are created by low pressure annealing, due to which the phase transition temperature of VO2 film decreases by 8 °C. The addition of an intermediate SiO2 layer can prevent the diffusion of Na+ ions and affect the preparation process of the VO2 thin film.

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VO2 thin films fabricated by reduction of thermal evaporated V2O5 under N2 flow

Cited by 11 publications

References 26 publications

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

Strategies for Enhanced Optical Performance and Durability of VO₂‐Based Thermochromic Windows

Fabrication and Optical Characterization of VO2-Based Thin Films Deposited on Practical Float Glass by Magnetron Sputtering and Professional Annealing

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VO2 thin films fabricated by reduction of thermal evaporated V2O5 under N2 flow

Cited by 11 publications

References 26 publications

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

Strategies for Enhanced Optical Performance and Durability of VO2‐Based Thermochromic Windows

Fabrication and Optical Characterization of VO2-Based Thin Films Deposited on Practical Float Glass by Magnetron Sputtering and Professional Annealing

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Product

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Strategies for Enhanced Optical Performance and Durability of VO₂‐Based Thermochromic Windows