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Spectrally selective reflector surfaces for heat reduction in concentrator solar cells: modeling and applications of TiO(2):Nb-based thin films
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0002-8279-5163
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Physics Department, Moi University, Eldoret, Kenya.
2011 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 50, no 19, 3296-3302 p.Article in journal (Refereed) Published
Abstract [en]

The energy conversion efficiency of a conventional pn junction solar cell decreases as the temperature increases, and this may eventually lead to failures in the photovoltaic system, especially if it uses concentrated solar radiation. In this work, we show that spectrally selective reflector (SSR) surfaces can be important for reducing the heat buildup on passively cooled solar cells. We outline a computational scheme for optimizing DC magnetron-sputtered TiO(2):Nb-based SSRs tailored for silicon solar cells and find good agreement of the reflectance with an experimental realization of the optimal SSR. A figure of merit for SSRs has also been derived and applied to the experimental data.

Place, publisher, year, edition, pages
2011. Vol. 50, no 19, 3296-3302 p.
National Category
Materials Engineering
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-156480DOI: 10.1364/AO.50.003296ISI: 000292542800029OAI: oai:DiVA.org:uu-156480DiVA: diva2:431947
Available from: 2011-09-23 Created: 2011-07-25 Last updated: 2017-12-08Bibliographically approved

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AO50(2011)3296(847 kB)581 downloads
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Niklasson, Gunnar AGranqvist, Claes G
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