Wide-Band High Concentration-Ratio Volume-Holographic Grating for Solar Concentration

Efficient and low-cost solar-energy collection has become the focus of many research works. This paper proposes a recording method and an experimental verification of a wide-band, large-angle, and high concentration-ratio volume-holographic grating for solar concentration. We applied the Kogelnik co...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2020-10, Vol.20 (21), p.6080
Main Authors: Wang, Chengchen, Ma, Jianshe, Kao, Hongxu, Wu, Taihui, Su, Ping
Format: Article
Language:English
Subjects:
Alternative energy sources
Design theory
Diffraction efficiency
Efficiency
Gluing
Gratings (spectra)
Holography
Letter
Light
photopolymer
Photopolymers
Polymerization
Renewable resources
solar concentration
volume hologram
wide band
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Summary:Efficient and low-cost solar-energy collection has become the focus of many research works. This paper proposes a recording method and an experimental verification of a wide-band, large-angle, and high concentration-ratio volume-holographic grating for solar concentration. We applied the Kogelnik coupled-wave theory and photopolymer diffusion model to analyse the formation mechanism and influencing factors on the diffraction efficiency of monochromatic volume-holographic gratings. We design and construct a three-color laser-interference system to record three monochromatic volume-holographic gratings. The best recording conditions are determined by experiment and simulation. A trichromatic volume-holographic grating is obtained by gluing the three monochromatic gratings together. The experimental results show that the trichromatic volume-holographic grating with a working angle of 6.7° and a working band of visible light has a light concentration ratio of 149.2 under an illumination of the combined recorded three-color beams, and that under sunlight is 27.2. We find that the proposed trichromatic volume-holographic grating for light concentration offers the advantages of wide band and high light concentration ratio, which provide a reference for solar concentration.
ISSN:1424-8220
1424-8220
DOI:10.3390/s20216080