A facile method for the preparation of W-doped VO 2 films with lowered phase transition temperature, narrowed hysteresis loops and excellent cycle stability

Dou, Shuliang; Zhang, Weiyan; Wang, Yuemin; Tian, Yue; Wang, Yi; Zhang, Xiang; Zhang, Leipeng; Wang, Lebin; Zhao, Jiupeng; Yao, Li

doi:10.1016/j.matchemphys.2018.05.018

Cited by 29 publications

(23 citation statements)

References 47 publications

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“…3. The peaks of W-4f5/2 and W-4f7/2 are located at 37.2 eV and 35.1 eV for all films which indicates that the oxidation state of W ions in the V1 -xWxO2±δ thin films is +6 [18,20,21]. However, these binding energies are slightly higher than for W 6+ in WO3 oxide (W-4f5/2 ~ 37.6 eV and W-4f7/2 ~ 35.5 eV) [22,23] revealing an interaction between W 6+ and V n+ cations in the V1-xWxO2±δ thin films.…”

Section: Surface Analysismentioning

confidence: 86%

“…2 shows the possible transformation from (011) VO2(M) to (110) VO2(R). This suggests that the coexistence of VO2 (M) and VO2 (R) could be stabilized at RT by effectively W doping [18]. The average crystallite size, D (nm), found between 16 and 24 nm were calculated from Debye-Scherrer formula via full-width at half maximum (β) of XRD lines [19].…”

Section: Structural Propertiesmentioning

confidence: 99%

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From multilayers to V1-xWxO2±δ films elaborated by magnetron sputtering for decreasing thermochromic transition temperature

Victor

Marcel

Sauques

et al. 2021

Journal of Alloys and Compounds

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Section: Surface Analysismentioning

confidence: 86%

Section: Structural Propertiesmentioning

confidence: 99%

From multilayers to V1-xWxO2±δ films elaborated by magnetron sputtering for decreasing thermochromic transition temperature

Victor

Marcel

Sauques

et al. 2021

Journal of Alloys and Compounds

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“…The thermochromic vanadium dioxide (VO 2 ) has been placed on forestage of many reversible materials, due to its discrepant reflection and transmittance of films [ 16 , 33 , 34 ]. The concepts of four switchable infrared metamaterial emitters based on VO 2 are presented in Figures 1(a) –(d).…”

Section: Methodsmentioning

confidence: 99%

Effect of Unit Cell Shape on Switchable Infrared Metamaterial VO ₂ Absorbers/Emitters

Ren

Wei

et al. 2021

Research

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Metamaterial absorber/emitter is an important aspect of infrared radiation manipulation. In this paper, we proposed four simple switchable infrared metamaterial absorbers/emitters with Ag/VO2 disks on the Ag plane employing triangle, square, hexagon, and circle unit cells. The spectral absorption peaks whose intensities are above 0.99 occur at ~4 μm after structure optimization when VO2 is in insulating state and disappear when VO2 becomes metallic state. The simulated electromagnetic field reveals that the spectral absorption peaks are attributed to the excitation of magnetic polariton within the insulating VO2 spacer layer, whose values exceed 1.59 orders of magnitude higher than the incident magnetic field. Longer resonant wavelength would be excited in square arrays because its configuration is a better carrier of charges at the same spans. For absorption stability, the absorbers/emitters with square and circular structures do not have any change with the polarization angles changing from 0° to 90°, due to the high rotational symmetric structure. And four absorbers/emitters reveal similar shifts and attenuations under different incident angles. We believed that the switchable absorber/emitter demonstrates promising applications in the sensing technology and adaptive infrared system.

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“…Gao et al had developed a polymer-assisted sol–gel method to prepare the VO 2 film, with enhanced thermochromic performance by double layer, increased microroughness, and nanoporous . Although the results break through the limit of T lum > 40% and Δ T sol > 10%, ,− ,− ,− it is still challenging to satisfy the demand of T lum > 60% and Δ T sol > 10% by the sol–gel method.…”

Section: Introductionmentioning

confidence: 99%

A Universal Approach To Achieve High Luminous Transmittance and Solar Modulating Ability Simultaneously for Vanadium Dioxide Smart Coatings via Double-Sided Localized Surface Plasmon Resonances

Dou

Zhao

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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Vanadium dioxide (VO2)-based thermochromic coatings has attracted considerable attention in the application of smart windows as a result of their intriguing property of metal–insulator transition at moderate temperatures. However, the practical requirements of smart windows, i.e., the high luminous transmittance of T lum > 60% and large solar modulating ability of ΔT sol > 10%, are competing to a large extent and hardly satisfied simultaneously. Here, we proposed a facile and universal method to prepare VO2 coatings for exceeding the criteria above using double-sided localized surface plasmon resonances (LSPRs), which are excited by the VO2 nanoparticles dispersed evenly on both surfaces of the fused silica substrate. With subtle engineering of the sol–gel and heat treatment processes, the morphology of as-prepared VO2 nanoparticles and corresponding LSPRs are controlled to achieve a high luminous transmittance (T lum = 68.2%) and solar modulating ability (ΔT sol = 11.7%) simultaneously. Further simulation suggests that the double-sided LSPRs can collectively enhance the performance of VO2 smart coatings. Moreover, the double-sided VO2 nanoparticle coatings demonstrate stable performance with no more than 1% degradation of T lum and ΔT sol after 1500 cycles. This study provides an alternative strategy to obtain high-quality VO2 (M) solar modulating coatings.

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A facile method for the preparation of W-doped VO 2 films with lowered phase transition temperature, narrowed hysteresis loops and excellent cycle stability

Cited by 29 publications

References 47 publications

From multilayers to V1-xWxO2±δ films elaborated by magnetron sputtering for decreasing thermochromic transition temperature

From multilayers to V1-xWxO2±δ films elaborated by magnetron sputtering for decreasing thermochromic transition temperature

Effect of Unit Cell Shape on Switchable Infrared Metamaterial VO ₂ Absorbers/Emitters

A Universal Approach To Achieve High Luminous Transmittance and Solar Modulating Ability Simultaneously for Vanadium Dioxide Smart Coatings via Double-Sided Localized Surface Plasmon Resonances

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A facile method for the preparation of W-doped VO 2 films with lowered phase transition temperature, narrowed hysteresis loops and excellent cycle stability

Cited by 29 publications

References 47 publications

From multilayers to V1-xWxO2±δ films elaborated by magnetron sputtering for decreasing thermochromic transition temperature

From multilayers to V1-xWxO2±δ films elaborated by magnetron sputtering for decreasing thermochromic transition temperature

Effect of Unit Cell Shape on Switchable Infrared Metamaterial VO 2 Absorbers/Emitters

A Universal Approach To Achieve High Luminous Transmittance and Solar Modulating Ability Simultaneously for Vanadium Dioxide Smart Coatings via Double-Sided Localized Surface Plasmon Resonances

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Product

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Effect of Unit Cell Shape on Switchable Infrared Metamaterial VO ₂ Absorbers/Emitters