V1−xMoxO2 thermochromic films deposited by reactive magnetron sputtering

Jin, Peng; Tanemura, Sakae

doi:10.1016/0040-6090(96)08641-5

Cited by 48 publications

(34 citation statements)

References 6 publications

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“…For example, experiments showed that the difference of light transmittance between the metallic phase and the insulator phase became smaller in the doped samples, 14,36 as compared to the case of pure VO 2 . Such behavior was probably attributed to the increased carrier concentration introduced by doping atoms in the insulator phase.…”

Section: Optical Propertiesmentioning

confidence: 99%

Theoretical study on the tungsten-induced reduction of transition temperature and the degradation of optical properties for VO2

Zhang

Xie

et al. 2013

The Journal of Chemical Physics

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We have studied the effect of the doped tungsten on the phase transition temperature and the optical properties between the monoclinic phase and the rutile phase of VO2 by performing first-principles calculations. It is found that the introduction of tungsten (W) significantly decreases the transition temperature between the rutile VO2 and the monoclinic VO2, with reducing the energy difference between the two phases. Meanwhile, our calculations indicate that the doped W lowers the infrared light transmittance of the monoclinic VO2, being consistent with the experimental observations. The nature about the reduction of the transition temperature and the change of the optical properties arising from the W dopants is revealed. Our results are valuable for application of VO2 as an optical energy material in future.

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Section: Optical Propertiesmentioning

confidence: 99%

Theoretical study on the tungsten-induced reduction of transition temperature and the degradation of optical properties for VO2

Zhang

Xie

et al. 2013

The Journal of Chemical Physics

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“…The films exhibit clear changes in transmittance, especially in the range 3600-4000 cm − 1 . The variation of the transmittance arises due to the films change from a semiconductor phase to a metallic phase [16]. The data is summarized in the Table 1.…”

Section: Thermochromic Properties Of the Filmsmentioning

confidence: 99%

Thermochromic properties of vanadium oxide films prepared by dc reactive magnetron sputtering

Cui

Teixeira

et al. 2008

Thin Solid Films

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A transparent vanadium oxide film has been one of the most studied electrochromic (EC) and Thermochromic (TC) materials. Vanadium oxide films were deposited at different substrate temperatures up to 400°C and different ratios of the oxygen partial pressure (P O2). SEM, AFM and X-ray diffraction's results show detail structure data of the films. IR mode assignments of the films measured by IR reflection-absorbance in NGIA (near grazing incidence angle) are given. It is found that the film has V 2 O 5 and VO 2 combined structures. The films exhibit clear changes in transmittance when the environment temperature (T e) is varied, especially in the 3600-4000 cm − 1 range. Applying a T e that is higher than a critical temperature (T c) to the samples, the as-RT (room temperature) deposited film with 9% P O2 has a transmittance variation of 30%, but the films that were deposited on a heated substrate of 400°C have little variation. There is tendency of bigger variation in transmittance for the sample deposited at a larger P O2 , when it is applied by 200°C T e .

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“…The range of metal ions that have been doped into the vanadium(IV) oxide lattice using PVD methods is not quite as extensive as those investigated with sol-gel and is mostly limited to those that are known to induce the largest decrease in the metal-to-semiconductor transition temperature, namely tungsten [12,34,35], and molybdenum [45][46]. Iron doping of vanadium (IV) oxide by PVD showed a minimum thermochromic transition temperature with 1.4 atom% Fe at 59 ºC on the heating cycle [10].…”

Section: Tc Coatingmentioning

confidence: 99%

Thermochromic Coatings for Intelligent Architectural Glazing

Parkin

Binions

Piccirillo

et al. 2008

JNanoR

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Abstract. Thermochromic glazing is a type of intelligent glazing; one where the properties of the glazing change according to some external stimulus. More particularly a thermochromic window is a device that changes its transmission and reflectance properties at a critical temperature (T c ). At this specific temperature the material undergoes a semi-conductor to metal transition. At temperatures lower than T c the window lets all of the solar energy that hits it through. At temperatures above T c the window reflects the infra-red portion of solar energy. In such a way thermochromic windows may help reduce air conditioning and heating costs leading to more energy efficient buildings. This review details the nature of the semi-conductor to metal transition and indicates how substitutional doping within a crystal lattice can be used to manipulate and fine tune the critical temperature. Also detailed is the underlying science and methodologies so far employed in the production of thermochromic thin films.

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V1−xMoxO2 thermochromic films deposited by reactive magnetron sputtering

Cited by 48 publications

References 6 publications

Theoretical study on the tungsten-induced reduction of transition temperature and the degradation of optical properties for VO2

Theoretical study on the tungsten-induced reduction of transition temperature and the degradation of optical properties for VO2

Thermochromic properties of vanadium oxide films prepared by dc reactive magnetron sputtering

Thermochromic Coatings for Intelligent Architectural Glazing

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