Gasochromic windows

Wittwer, V.; Datz, M.; Ell, Jürgen; Georg, Andreas; Graf, Wolfgang; Walze, Günther

doi:10.1016/j.solmat.2004.01.040

Cited by 150 publications

(78 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gasochromic windows have been introduced based on the chromic properties of WO 3 (Schweiger et al 1998;Georg et al 1998Georg et al , 2000aGeorg et al , 2000bGeorg et al , 2001aGeorg et al , 2001bGeorg et al , 2002Georg et al , 2008Opara-Krašovec et al 2000, 2002Wittwer et al 2001Wittwer et al , 2004Yaacob et al 2009) and palladium doped WO 3 (Zayat et al 1998, 2002 as stated previously in Ch.3.1. Due to its high redox potential, it is possible to colour WO 3 with hydrogen gas H 2 which is not possible for most other electrochromic materials.…”

Section: Wo3-based Gasochromic Windowsmentioning

confidence: 99%

“…Dissociation of H 2 into 2 H occurs on the upper surface catalysed by Pt, whereas the reaction leading to formation of colour centres occurs on the internal pore surfaces, after diffusions by the protons along the pores in the presence of water & mechanism of bleaching by O 2 (Wittwer et al 2004). …”

Section: Fig7mentioning

confidence: 99%

“…[right] Transmittance for the coloured and bleached state of a gasochromic double-glazed unit with a WO 3 layer of 500 nm and a hydrogen concentration of 1 % (Wittwer et al 2004) …”

Section: Fig7mentioning

confidence: 99%

See 2 more Smart Citations

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Bætens

Jelle

Gustavsen

2010

Solar Energy Materials and Solar Cells

1,140

591

View full text Add to dashboard Cite

A survey on prototype and currently commercial dynamic tintable smart windows has been carried out. The technologies of electrochromic, gasochromic, liquid crystal and electrophoretic or suspended-particle devices were examined and compared for dynamic daylight and solar energy control in buildings. Presently, state-of-the art commercial electrochromic windows seem most promising to reduce cooling loads, heating loads and lighting energy in buildings, where they have been found most reliable and able to modulate the transmittance up to 68 percent of the total solar spectrum. Their efficiency has already been proven in hot Californian climates, but more research is necessary to validate the products for colder climates, and to improve furthermore the commercial products in order to control the indoor climate in a more energy efficient way by reducing both heating and cooling loads.

show abstract

Section: Wo3-based Gasochromic Windowsmentioning

confidence: 99%

Section: Fig7mentioning

confidence: 99%

See 1 more Smart Citation

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Bætens

Jelle

Gustavsen

2010

Solar Energy Materials and Solar Cells

1,140

591

View full text Add to dashboard Cite

show abstract

“…105 Here, the optical transmission and solar gain can be switched between a bleached and darkened state by changing the redox state of a thin active material layer. Depending on the stimulus, this can be a form of active solar control, e.g., electrochromic 106 and gasochromic 107 glazing or passive solar control, e.g., photochromic 108 and thermochromic 109 glazing. All of these are active areas of scientific research, but electrochromic glazing based on tungsten oxide, WO 3 , (Fig.…”

Section: Solar Gains and Solar Control (G-value)mentioning

confidence: 99%

Energy in buildings—Policy, materials and solutions

Koebel

Wernery

Malfait

2017

MRS Energy & Sustainability

View full text Add to dashboard Cite

Buildings account for ∼40% of global energy demands, and the increased adoption of innovative solutions for buildings represents an enormous potential to reduce energy demands and greenhouse gas emissions. Here, we critically review the current and future materials and solutions for the construction sector. We describe how policy affects innovative businesses and the adoption of new products and solutions. We investigate how the building envelope and user behavior determine building energy demands. Compared to conventional solutions, superinsulation materials (vacuum insulation panels, silica aerogel) can achieve the same thermal performance with drastically thinner insulation. With low-emissivity coatings and appropriate filler gasses, double and triple glazing reduces thermal losses by an order of magnitude. Vacuum and aerogel glazing reduce these even further. Switchable glazing solutions maximize solar gains during wintertime and minimize illumination demands whilst avoiding overheating in summer. Upon integration of renewable energy systems, buildings become both producers and consumers of energy. Combined with the dynamic user behavior, temporal variations in energy production require thermal and electrical storage and the integration of buildings into smart grids and energy district networks. The combination of these measures can reduce the energy consumption of the building's stock by a factor of three.

show abstract

“…WO3 thin films belong to transparent wide band gap semiconductor group that in contact with a thin (few nanometers) Pt or Pd surface layer, their optical absorption transforms from the transparent to a dark blue state whenever are illuminated with hydrogen [1][2][3]. This optical switching is directly related to the double insertion/extraction of H+ ions and electrons according to the following reaction [4]:…”

Section: Introductionmentioning

confidence: 99%

Oxyhydrogen and Hydrogen Detection by Gasochromic Coloration of Highly Porous Tungsten Oxide with Fractal-Like Pd Nanoparticles

Ranjbar

Sberveglieri

2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

View full text Add to dashboard Cite

WO3 thin films were deposited by pulsed laser deposition (PLD) on glass substrates at 100 mTorr oxygen pressure. Monodispersed palladium nanoparticles (50 nm) were synthesized by hydrogen reduction of PdCl2 drop-casted on the surface of the films. For oxyhydrogen detection, first a saturated coloration by 10%H2/Ar was prepared. Then different oxygen flow with certain O2:H2 ratios were exposed to the colored samples. Depending on this ratio, the optical density of samples was observed to drop into certain new values until vanishes for a ratio about 20. A desirable fast coloration with linear dependency on hydrogen concentration was also observed.

show abstract

Gasochromic windows

Cited by 150 publications

References 11 publications

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Energy in buildings—Policy, materials and solutions

Oxyhydrogen and Hydrogen Detection by Gasochromic Coloration of Highly Porous Tungsten Oxide with Fractal-Like Pd Nanoparticles

Contact Info

Product

Resources

About