Broadband solar distributed Bragg reflector design using numerical optimization

Hansol Kim, Mine Kaya, Shima Hajimirza

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

In this paper, we optimize the structure of the multi-paired SiO2/TiO2 Bragg reflector to obtain broad-band and broad-angled high solar reflectivity in visible to near-infrared frequencies. To control the refractive index contrast in the BR pairs, the porosity of SiO2 (same across all layers) is also allowed to change. We study the trade-off between the number of pairs and porosity and the overall performance of the structure. As a result of the optimization, we demonstrate that a 15-pair structure can yield an average reflectivity twice that of a quarter-wavelength stack rule design for extraterrestrial irradiance.

Original languageEnglish
Pages (from-to)384-392
Number of pages9
JournalSolar Energy
Volume221
DOIs
StatePublished - Jun 2021

Keywords

  • Broad-band Distributed Bragg Reflector
  • Material design
  • Numerical optimization
  • Optical properties
  • Solar energy

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