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Proceedings Paper

Optical enhancement for luminescent solar concentrators
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Paper Abstract

A luminescent solar concentrator (LSC) generally is a sheet of highly transparent materials embedded with luminescent materials. Incident sunlight is absorbed by the luminescent materials, and then emitted through down conversion process at longer wavelengths. A large portion of the emitted light is trapped in the sheet and travels to the edges where photovoltaic solar cells are attached. In this study, we investigate the optical enhancement methods for LSCs with different sizes mainly by using optical gel and white diffuser. The largest tested LSC is up to 1.2m in length and with geometrical gain 64. This is, as we know, the largest reported size. It yields electrical gain 3.9 by optical enhancements. And the optical efficiency is still as large as 10%. The study shows that the enhancement by white diffuser is more sensitive to the size of the LSCs than that of the optical gel. Such enhancement drops with the increase of the sizes of LSC, but tends to plateau at certain size.

Paper Details

Date Published: 19 August 2010
PDF: 7 pages
Proc. SPIE 7785, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII, 77850D (19 August 2010); doi: 10.1117/12.863250
Show Author Affiliations
Chunhua Wang, Univ. of California, Merced (United States)
Roland Winston, Univ. of California, Merced (United States)
Weiya Zhang, Univ. of California, Merced (United States)
Dave Pelka, Pelka & Associate Inc. (United States)
Sue Carter, Univ. of California, Santa Cruz (United States)

Published in SPIE Proceedings Vol. 7785:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII
Roland Winston; Jeffrey M. Gordon, Editor(s)

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