Highly transparent ultrathin vanadium dioxide films with temperature-dependent infrared reflectance for smart windows

Jung, Ki Hwan; Yun, Sun Jin; Slusar, Tetiana; Kim, Hyun-Tak; Roh, Tea Moon

doi:10.1016/j.apsusc.2022.152962

Cited by 18 publications

(9 citation statements)

References 37 publications

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“…But when VO 2 transforms into the metal state, the absorption peak vanishes, and its absorption is as low as about 0.15, so there is a good infrared emissivity control effect. Similarly, some other work 79–81 also reflects the unique advantages of VO 2 in reducing infrared emissivity, and we can draw inspiration from the fact that VO 2 is better than some other metal oxides in that it is a phase-change material, which can produce a transition from a semiconductor (also known as an insulating state) to a metal state near 68 °C. The structural changes before and after the phase change result in its reversible transformation from transmission to reflection of infrared light.…”

Section: Bionic Infrared Stealthmentioning

confidence: 78%

Bionic structures for optimizing the design of stealth materials

Xu¹,

Li²,

Li³

et al. 2023

Phys. Chem. Chem. Phys.

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Section: Bionic Infrared Stealthmentioning

confidence: 78%

Bionic structures for optimizing the design of stealth materials

Xu¹,

Li²,

Li³

et al. 2023

Phys. Chem. Chem. Phys.

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“…They regulate indoor daylight and prevent glare and overheating, and improve the energy efficiency of buildings 5,6 . Chromogenic materials switch from a passive (bleached) state to an active (colored) state when certain values of environmental parameters are reached (photochromic 7 , thermochromic 8 , thermotropic 9 ) or under the influence of electrical voltage (electrochromic 10 ). Gasochromic coatings 11 operate under alternating exposure to hydrogen and oxygen.…”

Section: Introductionmentioning

confidence: 99%

“…Liquid crystal glasses 12 and suspended particles devices 13 are electrically controlled. Smart windows [5][6][7][8][9][10][11][12][13] operate regardless of the position of the Sun and do not adapt to the angles of incidence of solar rays. They weaken not only direct, but also diffuse solar radiation, which is undesirable for creating a comfortable light environment.…”

Section: Introductionmentioning

confidence: 99%

Double-grating optical filter for smart windows

Zakirullin,

Odenbakh,

Gunko

et al. 2024

Third International Conference on Optics, Computer Applications, and Materials Science (CMSD-III 2023)

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This paper presents methods for calculating the direct light transmittance of a double-grating optical filter. Based on these methods, numerical simulations were carried out, the results of which were confirmed by experiments under direct collimated white light without the influence of diffuse light using two grating smart window models with different sets of strip widths, as well as a model of a conventional window with clean glass. The results showed that by pre-calculating the angle of inclination, the widths of the strips of both gratings and their relative position, taking into account the coordinates of the building and the azimuth of the window, the filter provides angular selectivity of transmission without the use of shading/redirection devices. Window transmission with such a filter is minimized during specified times of the selected day when the need for sun protection is greatest. Due to the angular selective light transmission and the ability to adjust the inclination of the gratings to the trajectory of the Sun, such filters are promising for use in smart windows for optimal filtration of direct solar radiation indoors.

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“…The phase transition process between M and R is reversible, and the phase transition temperature is about 68℃. The phase transition characteristics of vanadium dioxide make it have a lot of application potential in intelligent window [2] , laser protection [3][4] , new class of tunable device0s [5] , infrared optical switch [6] , etc.…”

Section: Introductionmentioning

confidence: 99%

Laser damage threshold of vanadium dioxide film

Lü

Zhou²,

Wang³

et al. 2023

Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022)

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Vanadium dioxide film can be used to anti-laser interference infrared detector. If the laser energy is strong enough, the film may also be damaged under laser irradiation. VO2 thin films were prepared on sapphire substrates by molecular beam epitaxy. The laser damage threshold test of VO2 film was designed. VO2 film was irradiated with 1064 nm laser, and the damage characteristics of the film were observed by metallographic microscope. The damage threshold of the film was determined according to the damage morphology. The experimental equipment of laser pretreatment to enhance the film damage threshold was set up, and the laser energy of 20%-90% of the film damage threshold was used to pretreat the film. It is found that there is an optimal pretreatment energy for raising the damage threshold of vanadium dioxide films by laser pretreatment, and the optimal pretreatment energy is 60% of the damage threshold energy. The damage threshold of vanadium dioxide films pretreated with this energy was increased by about 31%.

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Highly transparent ultrathin vanadium dioxide films with temperature-dependent infrared reflectance for smart windows

Cited by 18 publications

References 37 publications

Bionic structures for optimizing the design of stealth materials

Bionic structures for optimizing the design of stealth materials

Double-grating optical filter for smart windows

Laser damage threshold of vanadium dioxide film

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