Coatings for concentrating solar systems – A review

Atkinson, Carol; Sansom, Christopher L.; Almond, Heather; Shaw, Christopher P.

doi:10.1016/j.rser.2015.01.015

Cited by 137 publications

(61 citation statements)

References 102 publications

(102 reference statements)

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“…To achieve superior spectral selectivity and high temperature stability, a variety of solar selective coatings, such as single-layer cermet coatings, absorber-reflector tandem, semiconductor coatings, metal-dielectric composite coatings etc. have been studied and reported elsewhere [11,12]. One important reason limiting the use of the single layer cermet coatings is that their optical property degrades quickly at high temperature due to change in their microstructure and oxidation.…”

Section: Introductionmentioning

confidence: 99%

Spectrally selective absorber coating of WAlN/WAlON/Al2O3 for solar thermal applications

Dan

Jyothi

Chattopadhyay

et al. 2016

Solar Energy Materials and Solar Cells

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A novel WAlN/WAlON/Al 2 O 3 coating was successfully deposited on stainless steel (SS) substrate using reactive DC and RF magnetron sputtering. Excellent spectrally selective property with a high absorptance of 0.958 in the solar spectrum region and low emittance of 0.08 in the infrared region were achieved by tailoring the target power, deposition time and the reactive flow rates of N 2 and O 2 . In the present solar selective coating, W layer acts as a back reflector and diffusion barrier, WAlN as the main absorber layer, WAlON as the semi-absorber layer, whereas the topmost Al 2 O 3 layer works as an anti-reflecting layer. In reference to the thermal stability, the absorber deposited on SS substrates exhibited high solar selectivity (α/ε) of 0.920/0.11, when heat treated in air up to 500°C for 2 hours. Taken together, the present study demonstrated that the WAlN/WAlON/Al 2 O 3 -based selective absorbing coating with excellent thermal stability could be a promising material for photo-thermal conversion at temperatures of up to 500°C.

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Section: Introductionmentioning

confidence: 99%

Spectrally selective absorber coating of WAlN/WAlON/Al2O3 for solar thermal applications

Dan

Jyothi

Chattopadhyay

et al. 2016

Solar Energy Materials and Solar Cells

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“…Coatings are used widely in concentrating solar systems to improve the performance of both reflectors and absorbers [6]. Antireflection coatings with an additional protective layer on silicon optics have a crucial importance in thermal devices.…”

Section: Introductionmentioning

confidence: 99%

Finite-element simulation of scratching on a coated brittle plate

Ogorodnikov¹

2016

AIP Conference Proceedings

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“…However, the sunlight is generally collected and focused as thermal power by concentrating solar thermal (CST) systems before converted to electric power [2]. The CST technology is able to both reduce costs and improve performances owing to its clever use of thin spectrally solar selective absorbing coatings rather than expensive bulk materials [3]. The reason why these coatings can improve the efficiency of photothermal conversion is that they possess high solar absorptance (a) over the visible and near-infrared spectrum region (0.3~2.5 mm)…”

Section: Introductionmentioning

confidence: 99%

“…Among the present elements, materials from the transition metal and lanthanide groups of the periodic table exhibit solar selective properties because they usually have many available orbits at energy levels compatible with the energy of visible light [3]. This makes them potentially suitable candidates for absorber coatings, either alone or in combination with other materials.…”

Section: Introductionmentioning

confidence: 99%