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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S5 — Sep. 10, 2012
  • pp: A655–A668

Increased efficiency of luminescent solar concentrators after application of organic wavelength selective mirrors

Paul P. C. Verbunt, Shufen Tsoi, Michael G. Debije, Dirk. J. Boer, Cees W.M. Bastiaansen, Chi-Wen Lin, and Dick K. G. de Boer  »View Author Affiliations

Optics Express, Vol. 20, Issue S5, pp. A655-A668 (2012)

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Organic wavelength-selective mirrors are used to reduce the loss of emitted photons through the surface of a luminescent solar concentrator (LSC). A theoretical calculation suggests that application of a 400 nm broad reflector on top of an LSC containing BASF Lumogen Red 305 as a luminophore can reflect 91% of all surface emitted photons back into the device. Used in this way, such broad reflectors could increase the edge-emission efficiency of the LSC by up to 66%. Similarly, 175 nm broad reflectors could increase efficiency up to 45%. Measurements demonstrate more limited effectiveness and dependency on the peak absorbance of the LSC. At higher absorbance, the increased number of internal re-absorption events reduces the effectiveness of the reflectors, leading to a maximum increase in LSC efficiency of ~5% for an LSC with a peak absorbance of 1. Reducing re-absorption by reducing dye concentration or the coverage of the luminophore coating results in an increase in LSC efficiency of up to 30% and 27%, respectively.

© 2012 OSA

OCIS Codes
(230.1480) Optical devices : Bragg reflectors
(230.3720) Optical devices : Liquid-crystal devices
(310.6860) Thin films : Thin films, optical properties
(350.6050) Other areas of optics : Solar energy
(230.7408) Optical devices : Wavelength filtering devices

ToC Category:
Solar Concentrators

Original Manuscript: May 2, 2012
Revised Manuscript: June 12, 2012
Manuscript Accepted: June 15, 2012
Published: July 18, 2012

Paul P. C. Verbunt, Shufen Tsoi, Michael G. Debije, Dirk. J. Broer, Cees W.M. Bastiaansen, Chi-Wen Lin, and Dick K. G. de Boer, "Increased efficiency of luminescent solar concentrators after application of organic wavelength selective mirrors," Opt. Express 20, A655-A668 (2012)

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