Thin solar concentrator with high concentration ratio

Jhe Syuan Lin, Chao Wen Liang

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

1 Scopus citations


Solar concentrators are often used in conjunction with III-V multi-junction solar cells for cost reduction and efficiency improvement purposes. High flux concentration ratio, high optical efficiency and high manufacture tolerance are the key features required for a successful solar concentrator design. This paper describes a novel solar concentrator that combines the concepts, and thus the advantages, of both the refractive type and the reflective type. The proposed concentrator design adopts the Etendue-cascading concept that allows the light beams from all the concentric annular entrance pupils to be collected and transferred to the solar cell with minimal loss. This concept enables the system to perform near its Etendue-Limit and have a high concentration ratio simultaneously. Thereby reducing the costs of solar cells and therefore achieves a better the per watts cost. The concentrator demonstrated has a thin aspect ratio of 0.19 with a zero back focal distance. The numerical aperture at the solar cell immersed inside the dielectric concentrator is as high as 1.33 achieving a unprecedented high optical concentration ratio design

Original languageEnglish
Title of host publicationHigh and Low Concentrator Systems for Solar Electric Applications VIII
StatePublished - 2013
EventHigh and Low Concentrator Systems for Solar Electric Applications VIII - San Diego, CA, United States
Duration: 27 Aug 201327 Aug 2013

Publication series

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


ConferenceHigh and Low Concentrator Systems for Solar Electric Applications VIII
Country/TerritoryUnited States
CitySan Diego, CA


  • Lens Design
  • Optical Etendue
  • Solar Concentrator
  • Solar Energy


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