Optically-Thick 300 nm GaAs Solar Cells Using Adjacent Photonic Crystals

Jeronimo Buencuerpo, Myles Steiner, Adele Tamboli

Research output: Contribution to journalArticlepeer-review

20 Scopus Citations


Ultra-thin photovoltaics offer the potential for increasing efficiency while minimizing costs. However, a suitable light trapping strategy is needed to reach the optically thick regime for otherwise thin-film structures. III-V materials can benefit from simple adjacent light trapping structures, if correctly designed. Here we present three strategies for a 300 nm thick GaAs cell using front photonic crystals, back photonic crystals, and both front and back combined, predicting a maximum photocurrent, Jsc=29.9 mA/cm2 under the radiative limit, including an enhanced absorption in the Urbach-tail. We analyze the increased absorption isolating the Fabry-Perot resonances, the single pass absorption and the scattered contribution from the incident light.

Original languageAmerican English
Article number391737
Pages (from-to)13845-13860
Number of pages16
JournalOptics Express
Issue number9
StatePublished - 2020

Bibliographical note

Publisher Copyright:
© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

NREL Publication Number

  • NREL/JA-5900-76580


  • Fabry Perot resonance
  • III-V
  • ultrathin PV
  • Urbach tail


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