Large area, low cost anti-reflective coating for solar glasses

Nielsen, Karsten H.; Orzol, Dominik; Koynov, S.; Carney, Steve; Hultstein, Eric; Wondraczek, Lothar

doi:10.1016/j.solmat.2014.05.034

Cited by 46 publications

(44 citation statements)

References 32 publications

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“…wavelength, S  is the solar irradiance intensity for air mass 1.5 (ASTM G173-03), and   is the wavelength increment) [11], the weighted average transmittance of the double ARCs in the range of 400-1200 nm reached 99.1%, very close to the theoretical design value of 99.5%. The transmittance error between the experimental and theoretical values mainly occurs in the range of 400-600 nm, usually caused by the scattered incident light on the rough coating surface of particles [12]. As shown in Fig.…”

Section: Resultsmentioning

confidence: 96%

Design and preparation of broadband antireflective coatings with excellent mechanical properties

Bao

Wang

et al. 2016

Materials Letters

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Double antireflective coatings with broadband, high-transmittance and scratch-resistance properties were prepared in this research by sol-gel method. The bottom layer was the mixture of silica nanoparticles and linear silicate polymers (SiO2 NPs-LPs) obtained from base/acid two-step catalyzed tetraethyl orthosilicate (TEOS), while the top layer was the mixture of hollow silica nanoparticles and linear silicate polymers (HSiO2 NPs-LPs). By optimizing the refractive index and the thickness of the double coatings, the optical performance of the double coatings was generally consistent with the results of theoretical design. The average transmittance in the wavelength range of 400-1200 nm reached 99.1%.Besides, through applying hydroxyl modification on the surfaces of silica particles and hollow spheres, the antireflective coatings exhibited excellent mechanical properties, with its pencil hardness reaching 5 H and critical load for scratch being 28.9 N. All these good features have made this coating promising in harsh outdoor conditions.

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Section: Resultsmentioning

confidence: 96%

Design and preparation of broadband antireflective coatings with excellent mechanical properties

Bao

Wang

et al. 2016

Materials Letters

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“…While the IR spectra presented above provide information on the local structure of silicate coatings the question is raised to determine how the local densification of the silicate coating after washing/annealing impacts the structure of the film at a larger scale, for example, regarding the concomitant formation some porosity. 25,26 The films were characterized by ellipsometry for their thickness and refractive index. Results for as-deposited, water-washed and then annealed samples are presented in Figure 6C.…”

Section: Aging Of the Basic Silicate Coatingsmentioning

confidence: 99%

Revisiting aqueous alkaline silicates as precursors for sol‐gel optical coatings

et al. 2019

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Alkaline silicates are well-known soluble silica derivatives already widely used for industrial purposes. Nevertheless, their applications for the elaboration of functional optical coatings have largely been discarded by the sol-gel community who mainly focused on alkoxide precursors. The objective of this work is to reconsider the alkaline silicates sol-gel chemistry, targeting optical coatings of a few hundreds of nanometers. The structures of Li + , Na + , and K + silicate coatings are discussed on the basis of spectroscopic characterizations. We show that a simple washing process allows a postdeposition removal of most alkaline ions, thus preventing the efflorescence effect and improving the aqueous stability of the films. Finally, several examples are shown for the application of alkaline silicates in the elaboration of functional optical coatings following conventional sol-gel chemistry.

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“…Concretely, limitations of electric devices typically include (1) restriction to a thin layer of immobilized liquid (carrying the switching function), what reduces the device's expected lifetime, (2) extended relaxation times between opaque and uncolored states (usually several minutes), (3) requirement of a continuous power supply in the transparent state (e.g., resulting in a power consumption of 5-20 W m −2 ), [17] and (4) reduced long-term UV stability and high cost, primarily arising from the TCO. Indeed, tin-doped indium oxide (ITO) as the most commonly employed TCO [17,32] is facing significant issues related to the supply of indium oxide at acceptable cost.…”

Section: Introductionmentioning

confidence: 99%

A Large‐Area Smart Window with Tunable Shading and Solar‐Thermal Harvesting Ability Based on Remote Switching of a Magneto‐Active Liquid

Heiz

Pan

et al. 2017

Advanced Sustainable Systems

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Switchable windows provide intriguing opportunities for addressing the challenges of modern building skins. In particular, indoor comfort and the control of radiative heat transfer into and out of the building require adaptive and tunable solutions for shading and emissivity. Here, a switchable, ultrathin suspended particle device (SPD) for large‐area integration with smart facades is presented. The system is based on a fluidic window, manufactured at low cost from a laminate of structured, rolled glass and a thin cover with high surface strength. Loading the circulating fluid with magnetic nanoparticles enables active shading and solar‐thermal energy harvesting, whereby the loading state and, hence, the optical properties of the liquid can be controlled through remote switching in a particle collector‐suspender device. In the fully shaded state, a typical harvesting efficiency of 45% of the incoming solar power is obtained. For an average solar irradiance of 1000 W m−2 during 800 h a−1, this corresponds to a solar thermal harvesting capacity in the range of 360 kWh a−1 m−2. In comparison to alternative SPD concepts, this enables high flexibility and compatibility with established production lines. In addition, there is no need for further electrical contact, transparent conductive layers, or electrolytes.

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Large area, low cost anti-reflective coating for solar glasses

Cited by 46 publications

References 32 publications

Design and preparation of broadband antireflective coatings with excellent mechanical properties

Design and preparation of broadband antireflective coatings with excellent mechanical properties

Revisiting aqueous alkaline silicates as precursors for sol‐gel optical coatings

A Large‐Area Smart Window with Tunable Shading and Solar‐Thermal Harvesting Ability Based on Remote Switching of a Magneto‐Active Liquid

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