Electrochromics and thermochromics for energy efficient fenestration: Functionalities based on nanoparticles of In2O3:Sn and VO2

Undoped and Mg-doped thermochromic VO 2 films with atom ratios z ≡ Mg/(Mg + V) of 0 ≤ z < 0.21 were deposited by reactive DC magnetron sputtering onto heated glass and carbon substrates. Elemental compositions were found by Rutherford backscattering spectrometry. Optical constants were determined from transmittance and reflectance measurements and were used for modeling the optical properties of thin films and dilute nanoparticle composite layers below and above the critical temperature for thermochromic switching between a low-temperature infrared transparent state and a high-temperature infrared reflecting or absorbing state. Mgdoped films showed superior luminous transmittance T lum and solar transmittance modulation ΔT sol compared to undoped VO 2 films, and both of these parameters could be further enhanced by anti-reflection. VO 2 -containing nanocomposites had much larger values of T lum and ΔT sol than VO 2 -based films. Mg-doping was found to erode the properties of the nanocomposites. Approximate performance limits are given on T lum and ΔT sol for thermochromic VO 2 films, with and without Mg doping and antireflection coating, and also for VO 2 -containing dilute nanocomposites.--

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“…69 and also to lower the thermal emittance as found for ZnO:Al/VO 2 . 70 A survey of earlier work has been given in the literature.…”

Section: A Thin Filmsmentioning

confidence: 74%

Thermochromic undoped and Mg-doped VO₂ thin films and nanoparticles: Optical properties and performance limits for energy efficient windows

Niklasson

Granqvist

2014

Journal of Applied Physics

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“…The literature contains many examples of self-dual Leonard pairs. For instance (i) ated with an irreducible module for the Terwilliger algebra of the hypercube (see [4, C Leonard pair of Krawtchouk type (see [10, De nition 6.1]); (iii) the Leonard pair assoc module for the Terwilliger algebra of a distance-regular graph that has a spin model bra (see [1,Theorem], [3,Theorems 4.1, 5.5]); (iv) an appropriately normalized totall (see [11,Lemma 14.8]); (v) the Leonard pair consisting of any two of a modular Leon De nition 1.4]); (vi) the Leonard pair consisting of a pair of opposite generators for bra, acting on an evaluation module (see [5,Proposition 9.2]). The example (i) is a sp examples (iii), (iv) are special cases of (v).…”

Section: Introductionmentioning

confidence: 99%

“…Vanadium oxide (VO 2 ) has received considerable attention as a host material applications in data display, electrochromic devices, optical and thermal switching, to sensing and actuation based on specific VO 2 polymorphs [1,2]. In particular, different polymorphs of VO 2 is including VO…”

Section: Introductionmentioning

confidence: 99%

Microstructure and luminescence of VO2 (B) nanoparticle synthesis by hydrothermal method

Pham

Quan

Manh

et al. 2019

Green Processing and Synthesis

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This paper reports the way for the synthesis of nanoplate VO2 (B) particles with controlled morphology. Nanoplate VO2 (B) particle was synthesized by hydrothermal method. Microstructure of VO2 (B) particles were controlled by hydrothermal temperatures and use of Zn doping into VO2 (B) matrix. The microstructure of the particles was shifted from nanowires to nanoplate morphology by changing of hydrothermal temperatures. The doping of Zn into VO2 nanoparticles resulted in an effective achievement of VO2 (B) phase. In addition, luminescence of VO2 (B) nanoparticle was also controlled by the use Zn doping. These results suggest that the potential application of Zn doped VO2 (B) particles for potential application in optical and energy techniques.

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“…An effective route to achieve this goal would be using smart coatings on building windows to control the solar radiation. Therefore, smart coatings based on electrochromism [6][7][8][9][10], thermochromism [11][12][13][14][15][16][17][18][19], gasochromism [20][21][22] and photochromism [23][24][25][26] have been widely investigated for energy-efficient coatings. Thermochromic-coated window can modulate near-infrared radiation (NIR) from transmissive to opaque in response to the environmental temperature from low to high, which does not require extra stimuli and can save more energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Solar Modulation Utilizing VO2-Based Thermochromic Coatings for Energy-Saving Applications

Cao¹,

Jin²

2018

Emerging Solar Energy Materials

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Energy consumption has become an urgent issue not only for the global environment, but also for people's lives. Among total energy consumption, buildings take nearly 40%. For buildings, energy exchange through windows accounts for over 50% by means of conduction, convection, and radiation. To reduce energy consumption, new structures should be developed for glass surfaces to enhance their thermal insulation properties. Vanadium dioxide (VO 2) is the most well-known thermochromic material, which exhibits a notable optical change from transparent to reflecting in the infrared upon a semiconductor-to-metal phase-transition. In this chapter, we provide a comprehensive summary of advances on the VO 2-based thermochromic coatings. Although the research on VO 2 smart window has been carried on for several decades, the real commercial use of it has not yet been achieved. The hindrance factors against commercial use are conventionally known as the unsatisfactory intrinsic properties of VO 2 material and have recently emerged as new challenges.

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Electrochromics and thermochromics for energy efficient fenestration: Functionalities based on nanoparticles of In2O3:Sn and VO2

Cited by 35 publications

References 66 publications

Thermochromic undoped and Mg-doped VO₂ thin films and nanoparticles: Optical properties and performance limits for energy efficient windows

Thermochromic undoped and Mg-doped VO₂ thin films and nanoparticles: Optical properties and performance limits for energy efficient windows

Microstructure and luminescence of VO2 (B) nanoparticle synthesis by hydrothermal method

Solar Modulation Utilizing VO2-Based Thermochromic Coatings for Energy-Saving Applications

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Electrochromics and thermochromics for energy efficient fenestration: Functionalities based on nanoparticles of In2O3:Sn and VO2

Cited by 35 publications

References 66 publications

Thermochromic undoped and Mg-doped VO2 thin films and nanoparticles: Optical properties and performance limits for energy efficient windows

Thermochromic undoped and Mg-doped VO2 thin films and nanoparticles: Optical properties and performance limits for energy efficient windows

Microstructure and luminescence of VO2 (B) nanoparticle synthesis by hydrothermal method

Solar Modulation Utilizing VO2-Based Thermochromic Coatings for Energy-Saving Applications

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Product

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Thermochromic undoped and Mg-doped VO₂ thin films and nanoparticles: Optical properties and performance limits for energy efficient windows

Thermochromic undoped and Mg-doped VO₂ thin films and nanoparticles: Optical properties and performance limits for energy efficient windows