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Journal of Photonics for Energy

Plasma etching antireflection nanostructures on optical elements in concentrator photovoltaic systems
Author(s): Efrain Eduardo Tamayo Ruiz; Kentaroh Watanabe; Ryo Tamaki; Takuya Hoshii; Masakazu Sugiyama; Yoshitaka Okada; Kenjiro Miyano; Aleksandra Cvetkovic; Rubén Mohedano; Maikel Hernández
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Paper Abstract

Transmission-type concentrator photovoltaic (CPV) systems are a potential candidate to achieve high efficiency and low cost solar energy. The use of optical elements in these systems creates reflection losses of incoming solar energy that account for about 8% to 12% depending on the optical design. In order to reduce these losses, we have nanostructured the air/optical-elements’ interfaces by using plasma etching methods on the Fresnel lens made of poly(methyl methacrylate) (PMMA) and the homogenizer made of glass. On flat PMMA and glass substrates, transmittance enhancement measurements are in agreement with relative Jsc gains. The field test results using a CPV module with all textured optical-elements’ interfaces achieved 8.0% and 4.3% relative Jsc and efficiency gains, respectively, demonstrating the potential of this approach to tackle the reflection losses.

Paper Details

Date Published: 29 December 2014
PDF: 7 pages
J. Photon. Energy. 5(1) 057006 doi: 10.1117/1.JPE.5.057006
Published in: Journal of Photonics for Energy Volume 5, Issue 1
Show Author Affiliations
Efrain Eduardo Tamayo Ruiz, Research Ctr. for Advanced Science and Technology (Japan)
Univ. of Tokyo (Japan)
Kentaroh Watanabe, Research Ctr. for Advanced Science and Technology (Japan)
Univ. of Tokyo (Japan)
Ryo Tamaki, Research Ctr. for Advanced Science and Technology (Japan)
Univ. of Tokyo (Japan)
Takuya Hoshii, Research Ctr. for Advanced Science and Technology (Japan)
Univ. of Tokyo (Japan)
Masakazu Sugiyama, The Univ. of Tokyo (Japan)
Yoshitaka Okada, Research Ctr. for Advanced Science and Technology (Japan)
Univ. of Tokyo (Japan)
Kenjiro Miyano, Research Ctr. for Advanced Science and Technology (Japan)
Univ. of Tokyo (Japan)
Aleksandra Cvetkovic, Light Prescriptions Innovators Europe, S. L. (Spain)
Rubén Mohedano, Light Prescriptions Innovators Europe, S. L. (Spain)
Maikel Hernández, Light Prescriptions Innovators Europe, S. L. (Spain)


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