The effect of an organic selectively-reflecting mirror on the performance of a luminescent solar concentrator

M.G. Debije, M.-P. Van, P.P.C. Verbunt, D.J. Broer, C.W.M. Bastiaansen

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

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Abstract

To reduce the surface losses in the luminescent solar concentrator (LSC) we have applied an organic wavelength-selective mirror, a chiral nematic (cholesteric) liquid crystal, onto a fluorescent waveguide with a small air gap in between. We compare the light outputs of the waveguide with absorbing, scattering, and mirrored bottoms. The highest light output is achieved using a scattering background and a cholesteric mirror with a reflection band significantly red-shifted with respect to the emission spectrum of the fluorescent dye. The use of an air gap results in refraction and light bending away from the normal and, consequently, a red shift of the cholesteric mirrors is required which also negatively affects its performance. A 15% increase in edge power output is demonstrated at low dye concentrations, suggesting light that is emitted to the surface of the waveguide is re-directed by the mirrors to the edge with an efficiency of about 35%. At high fluorescent dye concentrations, the chiral-nematic mirrors have reduced impact on dye emission.
Original languageEnglish
Title of host publicationProceedings of the 24th European Photovoltaic Solar Energy Conference
PublisherWIP
Pages373-376
ISBN (Print)3-936338-25-6
DOIs
Publication statusPublished - 2009
Event24th European Photovoltaic Solar Energy Conference (EU PVSEC 2004) - Hamburg
Duration: 21 Sep 200925 Sep 2009
Conference number: 24

Conference

Conference24th European Photovoltaic Solar Energy Conference (EU PVSEC 2004)
Abbreviated titlePVSEC 2004
CityHamburg
Period21/09/0925/09/09
Other24th European Photovoltaic Solar Energy Conference, Hamburg, Germany

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