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Ultrathin nanostruc...
Ultrathin nanostructured solar selective absorber based on a two-dimensional hemispherical shell array
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Chi, K. (författare)
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Yang, L. (författare)
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- He, Sailing (författare)
- KTH,Skolan för elektro- och systemteknik (EES),Zhejiang-KTH Joint Research Center of Photonics, JORCEP
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(creator_code:org_t)
- American Institute of Physics Inc. 2018
- 2018
- Engelska.
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Ingår i: Applied Physics Letters. - : American Institute of Physics Inc.. - 0003-6951 .- 1077-3118. ; 112:6
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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visa färre...
Abstract
Ämnesord
Stäng
- A distinctive ultrathin nanostructured solar selective absorber is demonstrated experimentally. It consists of a self-assembled, two-dimensional, closely packed hexagonally distributed tungsten hemispherical shell array coated with an ultrathin germanium film (20 nm in thickness) and a silicon dioxide antireflective film. Due to the combined light trapping effects of unconventional interferences within the germanium film and the excited surface plasmon polaritons at the tungsten-germanium interface, as well as the antireflection effect of the silicon dioxide layer, the solar absorption of this absorber (0.93) is about as high as that of commercial black paint (0.94) and much higher than that of its planar counterpart (0.83). With greatly suppressed emission/absorption in the long wavelength range, its heat accumulation is superior, enabling a much higher temperature (218 °C under 7-sun illumination) than its planar counterpart and the black paint absorber (203 °C and 181 °C under 7-sun illumination, respectively).
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Electromagnetic wave polarization
- Germanium
- Interfaces (materials)
- Paint
- Silica
- Tungsten
- Anti-reflection effects
- Antireflective films
- Heat accumulation
- Hemispherical shells
- Light trapping effects
- Long-wavelength-range
- Silicon dioxide layers
- Surface plasmon polaritons
- Solar absorbers
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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