Volume Holographic Optical Elements as Solar Concentrators

Ferrara, Maria Antonietta; Bianco, G.; Borbone, Fabio; RobertoCentore,; Striano, V.; Coppola, Giuseppe

doi:10.5772/66200

Cited by 6 publications

(9 citation statements)

References 55 publications

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“…Thus, an interferometric pattern that replaces the response of the focusing optical systems used as object is generated, obtaining a V-HOE that acts as a focusing element. This V-HOE shows the same effect as spherical or cylindrical lenses [4,24]. A typical recording setup is reported in Figure 1b.…”

Section: V-hoe Recording Processsupporting

confidence: 55%

“…Photopolymers are the most studied holographic materials since the 1970s; they are based on polymerization and cross-linking reactions induced by absorption of light and they offer several advantages respect to silver halide and DCG. Indeed, photopolymerizable materials show high diffraction efficiencies, allow real-time monitoring of the recording process, do not require development processes but only a bleaching process, can be produced from raw materials at low cost and give the possibility to modulate the properties through chemical synthesis [4]. Additional, photopolymers can be mass produced allowing to reducing production costs [30,31].…”

Section: Photopolymersmentioning

confidence: 99%

“…Finally, the sol-gel chemistry versatility allows obtaining a high level of interpenetration between the organic and inorganic networks, as reported in Refs. [4,[45][46][47]. Photopolymer with a very low outgassing level and a high resistance to strong thermal excursions, that can be useful for some applications, was obtained by sol-gel techniques [4].…”

Section: Photopolymersmentioning

confidence: 99%

“…Thus, an enhancement of the collected light is desirable. Of course, in the space the holographic materials must be able to withstand much more drastic conditions respect to earth applications, due to strong thermal excursions, high vacuum and the presence of high-energy gamma, electronic and protonic radiation originating from the solar wind [4,46,47].…”

Section: Commercial and Space Holographic Concentratorsmentioning

confidence: 99%

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Volume Holographic Optical Elements as Solar Concentrators: An Overview

Ferrara

Striano²,

Coppola

2019

Applied Sciences

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Generally, to reduce the area of a photovoltaic cell, which is typically very expensive, solar concentrators based on a set of mirrors or mechanical structures are used. However, such solar concentrators have some drawbacks, as they need a tracking system to track the sun’s position and also they suffer for the overheat due to the concentration of both light and heat on the solar cell. The fundamental advantages of volume holographic optical elements are very appealing for lightweight and cheap solar concentrators applications and can become a valuable asset that can be integrated into solar panels. In this paper, a review of volume holographic-based solar concentrators recorded on different holographic materials is presented. The physical principles and main advantages and disadvantages, such as their cool light concentration, selective wavelength concentrations and the possibility to implement passive solar tracking, are discussed. Different configurations and strategies are illustrated and the state-of-the-art is presented including commercially available systems.

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Section: V-hoe Recording Processsupporting

confidence: 55%

Section: Photopolymersmentioning

confidence: 99%

Section: Photopolymersmentioning

confidence: 99%

Section: Commercial and Space Holographic Concentratorsmentioning

confidence: 99%

See 2 more Smart Citations

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Ferrara

Striano²,

Coppola

2019

Applied Sciences

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“…In order to solve this problem, solar concentrating technology is used to reduce the area of PV cells, so as to reduce the cost and improve the efficiency of solar energy utilization. Solar concentrating elements can be classified into traditional solar concentrators and holographic solar concentrators [4,5]. A traditional photovoltaic solar concentrator includes a focus element and a tracking system, wherein the focus element is usually a Fresnel lens.…”

Section: Introductionmentioning

confidence: 99%

Crosstalk-Reduced Double-Layer Half-Divided Volume Holographic Concentrator for Solar Energy Concentration

Kao

Wang

et al. 2020

Sensors

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A new double-layer sunlight concentration system, where each layer is divided into two regions, is proposed, and the system has four volume holograms. Since the four holograms convert light in different directions, the interlayer crosstalk is reduced, and the system has a high concentration ratio. The simulation results show that the concentration system can achieve a 30° operation angle range. The holograms are fabricated on photopolymer substrates, and the left half of the system is implemented using two holograms. The characteristics of the left half of the system are assessed. The agreement of the simulation and experimental results on diffraction efficiency validates the proposed method. The tested monochromatic concentration ratio can achieve a record of 418.8, and the concentration ratio under sunlight is 5.38. The experiment results of light use efficiency are close to the simulation with non-crosstalk, which indicates that the interlayer crosstalk is small.

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Recording and analysis of off-axis multiplexed volume holographic lens for wavelength selective wide acceptance angle operation in concentrator photovoltaics

Khan

Yadav

2023

Opt. Eng.

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Photovoltaic (PV) conversion is highly wavelength-dependent. The efficiency of a PV system is maximum when converting photons of energy close to the bandgap energy of solar cells. In a spectral-splitting solar cell system, an appropriately designed holographic lens provides wavelength-selective performance to disperse and concentrate a specific spectral region of solar radiation with appreciable diffraction efficiency. However, for holographic lenses, the angular range over that diffraction efficiency remains appreciable is limited. To overcome the difficulties associated with the limited acceptance angle (angular selectivity) of a single holographic lens, an investigation on the design aspect of a multiplexed off-axis holographic lens has been made for the collection and concentration of sunlight effectively over a wide angular range with appreciable diffraction efficiency. Processing parameters for a typical thick-phase holographic lens have been optimized to get the maximum value of the acceptance angle. Based on the theoretical design, a multiplexed hologram consisting of four angularly multiplexed holographic lenses of equal fringe spacing has been recorded. Experimental curves for the variation of diffraction efficiency with the angle of reconstruction have been presented to show the effectiveness of such multiplexed lens for solar tracking. Simulation results for the multiplexed holographic lens are also presented, which shows a good agreement with the experimental results. Results show that such off-axis multiplexed holographic lenses can advantageously be used for wavelength-selective performance with appreciable diffraction efficiency over a wide angular range.

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Volume Holographic Optical Elements as Solar Concentrators

Cited by 6 publications

References 55 publications

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Crosstalk-Reduced Double-Layer Half-Divided Volume Holographic Concentrator for Solar Energy Concentration

Recording and analysis of off-axis multiplexed volume holographic lens for wavelength selective wide acceptance angle operation in concentrator photovoltaics

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