Tunable thermochromic properties of V 2 O 5  coatings

Kumar, Sunil; Maury, F.; Bahlawane, Naoufal

doi:10.1016/j.mtphys.2017.06.005

Cited by 22 publications

(5 citation statements)

References 39 publications

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“…In the class of vanadium oxide, V2O5 is also promising and extensively studied materials for its thermochromic and electrochromic properties. There have been reports on vanadium oxide (V2O5), appearing in three colour(yellow↔green↔blue) tuned via ion insertion [20][21].Such observation still lacks of poor colour-tuning adaptability, and little colour saturation. In this paper we report the fabrication of V2O5 thin films on 7059 glass substrate via cathodic vacuum arc method.…”

Section: Rafas-2021mentioning

confidence: 99%

Tunable thermochromism in V₂O₅ films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency

Neema

Abhijith

Panwar

et al. 2022

J. Phys.: Conf. Ser.

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Theromochromism and electrochromic coatings have promising applications in smart windows, IR sensors, and bio-medical devices. In this paper, we report the growth of vanadium oxide films using cathodic vacuum arc method for thermochromic application. Successive annealing of the as grown film shows the formation of yellow color V2O5 films. The color of the as grown films suggest the growth of highly disordered black VxOy film which after annealing gets converted into yellow V2O5 as confirmed by the X-ray diffraction and Raman spectroscopy. The scanning electron microscopy equipped with energy dispersive X-ray analysis was used to investigate the morphology and chemical composition of V2O5 phase. Although, the films gets completely converted into the stable phase after annealing but heating cycling of temperature significantly changes the color of the films in a reversible manner that confirms the thermochromic behavior. We propose a breathing of oxygen (tailoring of Oxygen within the films) responsible for such reversible change in the color. These studies open new pathways for investigating these films to electrochromic properties by locally heating the materials through electric current (through Joule heating) and change the optical properties.

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Section: Rafas-2021mentioning

confidence: 99%

Tunable thermochromism in V₂O₅ films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency

Neema

Abhijith

Panwar

et al. 2022

J. Phys.: Conf. Ser.

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“…Inorganic systems, for instance, VO 2 , are sensitive to higher heating conditions, which might not occur in a functional device. [13][14][15][16][17][18][19][20] On the other hand, the organic dies, for example, leucodyes, are sensitive to moisture and UV exposure. [21,22] Metal-organic frameworks (MOFs) have been investigated as potential materials for thermoresponsive applications.…”

Section: Introductionmentioning

confidence: 99%

“…Inorganic systems, for instance, VO 2 , are sensitive to higher heating conditions, which might not occur in a functional device. [ 13–20 ] On the other hand, the organic dies, for example, leucodyes, are sensitive to moisture and UV exposure. [ 21,22 ]…”

Section: Introductionmentioning

confidence: 99%

Flexible and Stretchable Thermoresponsive Display for Multifunctional Device Applications

Kumar,

Sharma,

Bendi

et al. 2024

Adv Eng Mater

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Metal–organic frameworks (MOFs) have been recognized vastly as stimuli‐responsive materials owing to their extreme sensitivity toward the stimuli that make them flawless nominees for multifunctional device applications. However, MOFs are often oversensitive toward moisture, which significantly affects their stable responses and reproducibility. Herein, a MOF–polymer display (i.e., copper‐based MOF with polydimethylsiloxane) is developed that exhibits high sensitivity toward temperature changes without getting affected by moisture. In response to the thermal gradient, the display exhibits the change in color from sky blue to dark blue when the temperature varies from 30 to 100 ºC, which is attributed to the second‐order phase transition within the time interval 40 s and reversible in 60 s. To provide insights on the mechanism, ex situ UV–vis and temperature‐dependent operando X‐day diffraction are conducted, which unveils that the color change in the display is associated with reversible contraction/expansion of the unit cell parameters. In addition to that, the thermoresponse of the display remains unaffected under mechanical deformations, which indicates that the color display is mechanically and thermally stable. The as‐developed color display is mechanically robust and highly sensitive toward temperature change; it can be utilized as the color indicator in signaling temperature rise in smart mobiles or laptops during discharging to keep the user safe or applications in augmented intelligence.

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“…Among these, vanadium pentoxide has a fascinating material because of its variable oxidation states between V 2+ and V 5+ with large optical band gap (2.30 eV), outstanding physically and chemically stable material [4,5]. Besides of these unique characteristics, natural abundance the large specific heat capacity and comparatively low-cost makes it to a various scientific and industrial applications such as solar cell, batteries, fibre optical storage systems, laser scanners, thermochromic coatings, switching devices, ultrafast switching and IR detectors and gas sensors [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Gossamer-like V<sub>2</sub>O<sub>5</sub> Thin Films for the Detection of Toxic Volatile Organic Compounds

et al. 2021

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Nanostructured vanadium pentoxide (V2O5) thin films are successfully deposited on an ultrasonically cleaned glass substrate with different deposition parameters via spray pyrolysis technique. The X-ray diffraction analysis showed that the V2O5 films are polycrystalline with an orthorhombic structure. SEM analysis illustrated that the gossamer-like morphology at the substrate temperature of 325 °C. The average crystallite size of the films changes from 14.29 to 23.81 nm, due to the deposition temperature enhancement. The film which is deposited at a substrate temperature of 325 °C has shown high transmittance. XPS studies validated the existence of V5+ oxidation form of vanadium in vanadium oxide thin film. Gas sensors are electronic devices designed to trace the concentration of different toxic gases existing in the environment. Gas sensing characterization has been performed using static liquid distribution technique towards different volatile organic compounds such as acetone, methanol, toluene and xylene. The thin film prepared at a substrate temperature of 325 °C has shown the maximum response towards 100 ppm of toluene at room temperature. The response and recovery times are determined using transient response curve, and the obtained values are 21sec and 31sec, respectively.

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Tunable thermochromic properties of V 2 O 5 coatings

Abstract: OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.

Cited by 22 publications

References 39 publications

Tunable thermochromism in V₂O₅ films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency

Tunable thermochromism in V₂O₅ films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency

Flexible and Stretchable Thermoresponsive Display for Multifunctional Device Applications

Gossamer-like V<sub>2</sub>O<sub>5</sub> Thin Films for the Detection of Toxic Volatile Organic Compounds

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Tunable thermochromic properties of V 2 O 5 coatings

Abstract: OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.

Cited by 22 publications

References 39 publications

Tunable thermochromism in V2O5 films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency

Tunable thermochromism in V2O5 films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency

Flexible and Stretchable Thermoresponsive Display for Multifunctional Device Applications

Gossamer-like V<sub>2</sub>O<sub>5</sub> Thin Films for the Detection of Toxic Volatile Organic Compounds

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Tunable thermochromism in V₂O₅ films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency

Tunable thermochromism in V₂O₅ films deposited by cathodic vacuum arc method by tailoring the oxygen deficiency