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.
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21 October 2014
Research Article|
October 21 2014
Optimized scalable stack of fluorescent solar concentrator systems with bifacial silicon solar cells
Ana Luisa Martínez Díez;
Ana Luisa Martínez Díez
a)
1
Fundación ITMA
, Parque Empresarial Principado de Asturias, C/Calafates, Parcela L-3.4, 33417 Avilés, Spain
2
Fraunhofer Institute for Solar Energy Systems ISE
, Heidenhofstr. 2, 79110 Freiburg, Germany
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Johannes Gutmann;
Johannes Gutmann
2
Fraunhofer Institute for Solar Energy Systems ISE
, Heidenhofstr. 2, 79110 Freiburg, Germany
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Janina Posdziech;
Janina Posdziech
2
Fraunhofer Institute for Solar Energy Systems ISE
, Heidenhofstr. 2, 79110 Freiburg, Germany
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Tim Rist;
Tim Rist
2
Fraunhofer Institute for Solar Energy Systems ISE
, Heidenhofstr. 2, 79110 Freiburg, Germany
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David Gómez Plaza;
David Gómez Plaza
1
Fundación ITMA
, Parque Empresarial Principado de Asturias, C/Calafates, Parcela L-3.4, 33417 Avilés, Spain
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Jan Christoph Goldschmidt
Jan Christoph Goldschmidt
2
Fraunhofer Institute for Solar Energy Systems ISE
, Heidenhofstr. 2, 79110 Freiburg, Germany
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a)
Electronic mail: a.martinez@itma.es. Phone: +34985129120. Fax: +34985129008.
J. Appl. Phys. 116, 154507 (2014)
Article history
Received:
August 07 2014
Accepted:
October 01 2014
Citation
Ana Luisa Martínez Díez, Johannes Gutmann, Janina Posdziech, Tim Rist, David Gómez Plaza, Jan Christoph Goldschmidt; Optimized scalable stack of fluorescent solar concentrator systems with bifacial silicon solar cells. J. Appl. Phys. 21 October 2014; 116 (15): 154507. https://doi.org/10.1063/1.4897926
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