Two-axes spectral splitting optical concentrator based on single plastic element

M. Stefancich, C. Maragliano, Harry Apostoleris, Matteo Chiesa

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

1 Scopus citations

Abstract

High efficiency concentrator photovoltaic systems are currently based on costly III/V cells and, to offset the high cell capital cost, elevated optical concentrations are used, with consequent reduction in acceptance angles and tight tolerance optics. While this allows for spectacular conversion efficiencies, it does not provide cost effectiveness in a market dominated by low efficiency/low cost technologies. An alternative approach, well known in literature, is based on the combined use of an optical concentrator and a spectral splitting element allowing for the use of separate cells with different spectral responses and, thus, opening the way to a much wider range of possible materials and technologies. While many configurations have been presented during the years, optical efficiency has often been an issue due to the separate action of the concentrating and splitting element. We propose here, as substantial evolution of a previous design [1], a single injection molded plastic non-imaging optical element embodying both two axes concentration and spectral splitting functions. Based on the specific dispersion characteristics of polycarbonate and on a constructive analytical design procedure, this element allows for optical efficiencies exceeding 80%. Theory, simulations and preliminary experimental results will be presented.

Original languageBritish English
Title of host publicationHigh and Low Concentrator Systems for Solar Energy Applications IX
EditorsCandace Pfefferkorn, Adam P. Plesniak
PublisherSPIE
ISBN (Electronic)9781628412024
DOIs
StatePublished - 2014
EventHigh and Low Concentrator Systems for Solar Energy Applications IX - San Diego, United States
Duration: 19 Aug 201420 Aug 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9175
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHigh and Low Concentrator Systems for Solar Energy Applications IX
Country/TerritoryUnited States
CitySan Diego
Period19/08/1420/08/14

Keywords

  • injection molding
  • photovoltaics concentration
  • plastic optics
  • solar concentration
  • Spectral Splitting

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