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Photon frequency management materials for efficient solar energy collection

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

  • Lefteris Danos
  • Thomas J. J. Meyer
  • Pattareeya Kittidachachan
  • Liping Fang
  • Thomas S. Parel
  • Nazila Soleimani
  • Tomas Markvart
Publication date2015
Host publicationMaterials challenges: inorganic photovoltaic solar energy
EditorsStuart J. C. Irvine
Place of PublicationCambridge
PublisherRSC Publishing
Number of pages35
ISBN (electronic)9781849733465
ISBN (print)9781849731874
<mark>Original language</mark>English


The chapter outlines a range of materials and techniques that can be employed to improve sunlight capture for application in photovoltaics (PV). We review processes such as simple luminescence down-shifting structures, luminescent (or fluorescent) solar collectors and light trapping via a frequency shift which result in an increase of the solar photon flux and significant reduction in PV material requirements. A simple two-flux model is presented within a unified treatment for the collectors and down-shifting structures to estimate re-absorption losses and to determine the collection efficiency based on spectroscopic measurements of the absorption and luminescence spectra. Photon frequency management materials are reviewed which use efficient resonance energy transfer to wavelength shift the incoming solar flux. We show that frequency photon management represents a powerful tool, allowing enhancement in light trapping above the Yablononovitch limit and leading to potentially highly efficient, but employing very thin crystalline silicon, solar cells.