Ultrabroadband and Wide-Angle Hybrid Antireflection Coatings With Nanostructures

Emmett E. Perl, Chieh Ting Lin, William E. McMahon, Daniel J. Friedman, John E. Bowers

Research output: Contribution to journalArticlepeer-review

22 Scopus Citations


Ultrabroadband and wide-angle antireflection coatings (ARCs) are essential to realizing efficiency gains for state-of-the-art multijunction photovoltaic devices. In this study, we examine a novel design that integrates a nanostructured antireflection layer with a multilayer ARC. Using optical models, we find that this hybrid approach can reduce reflected AM1.5D power by 10-50 W/m2 over a wide angular range compared to conventional thin-film ARCs. A detailed balance model correlates this to an improvement in absolute cell efficiency of 1-2%. Three different ARC designs are fabricated on indium gallium phosphide, and reflectance is measured to show the benefit of this hybrid approach.

Original languageAmerican English
Article number6746652
Pages (from-to)962-967
Number of pages6
JournalIEEE Journal of Photovoltaics
Issue number3
StatePublished - May 2014

NREL Publication Number

  • NREL/JA-5J00-62254


  • Biomimetics
  • III-V semiconductor materials
  • optical films
  • photovoltaic cells


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