Organic wavelength selective mirrors for luminescent solar concentrators

P.P.C. Verbunt, M.G. Debije, D.J. Broer, C.W.M. Bastiaansen, D.K.G. Boer, de

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)
5 Downloads (Pure)

Abstract

Organic polymeric chiral nematic liquid crystalline (cholesteric) wavelength selective mirrors can increase the efficiency of luminescent solar concentrators (LSCs) when they are illuminated with direct sunlight normal to the device. However, due to the angular dependence of the reflection band, at larger incidence angles the cholesterics reflect away some incoming sunlight that could have been absorbed by the luminophore. As a result, the increase in LSC efficiency after application of a cholesteric reflector drops if the light incident to the device is at angles larger than 30 degrees. The cholesteric reflectors still have a positive impact on device performance for light incident up to 45-50 degrees but at larger angles efficiency decreases when a cholesteric reflector is added. This affects the performance of the LSC device when illuminated with indirect incident light, especially when the incident light has a large contribution of photons above 45 degrees.
Original languageEnglish
Title of host publicationProceedings of SPIE Photonics for solar energy systems IV, 16-19 April 2012, Brussels, Belgium
EditorsR. Wehrspohn, A. Gombert
Place of PublicationBellingham
PublisherSPIE
Pages843805-
DOIs
Publication statusPublished - 2012
Eventconference; Photonics for Solar Energy systems IV -
Duration: 1 Jan 2012 → …

Publication series

NameProceedings of SPIE
Volume8438
ISSN (Print)0277-786X

Conference

Conferenceconference; Photonics for Solar Energy systems IV
Period1/01/12 → …
OtherPhotonics for Solar Energy systems IV

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