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  4. Optimized scalable stack of fluorescent solar concentrator systems with bifacial silicon solar cells
 
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2014
Journal Article
Title

Optimized scalable stack of fluorescent solar concentrator systems with bifacial silicon solar cells

Abstract
In this paper, we present a concentrator system based on a stack of fluorescent concentrators (FCs) and a bifacial solar cell. Coupling bifacial solar cells to a stack of FCs increases the performance of the system and preserves its efficiency when scaled. We used an approach to optimize a fluorescent solar concentrator system design based on a stack of multiple fluorescent concentrators (FC). Seven individual fluorescent collectors (20 mm × 20 mm × 2 mm) were realized by in-situ polymerization and optically characterized in regard to their ability to guide light to the edges. Then, an optimization procedure based on the experimental data of the individual FCs was carried out to determine the stack configuration that maximizes the total number of photons leaving edges. Finally, two fluorescent concentrator systems were realized by attaching bifacial silicon solar cells to the optimized FC stacks: a conventional system, where FC were attached to one side of the solar cell as a reference, and the proposed bifacial configuration. It was found that for the same overall FC area, the bifacial configuration increases the short-circuit current by a factor of 2.2, which is also in agreement with theoretical considerations.
Author(s)
Martínez Díez, A.L.
Gutmann, J.
Posdziech, J.
Rist, Tim  
Gómez Plaza, D.
Goldschmidt, Jan Christoph  
Journal
Journal of applied physics  
DOI
10.1063/1.4897926
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Solarzellen - Entwicklung und Charakterisierung

  • Farbstoff

  • Organische und Neuartige Solarzellen

  • Photonenmanagement

  • solar cells

  • concentrators

  • concentration

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