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Related Experiment Video

Updated: Jun 24, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Broadband omnidirectional antireflection coatings optimized by genetic algorithm.

David J Poxson1, Martin F Schubert, Frank W Mont

  • 1Department of Physics, Applied Physics, and Astronomy, Future Chips Constellation, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.

Optics Letters
|March 14, 2009
PubMed
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This study presents an optimized graded-refractive-index (GRIN) antireflection (AR) coating for solar cells. The novel three-layer coating significantly reduces reflection across a broad spectrum and wide angles, enhancing solar energy capture.

Area of Science:

  • Materials Science
  • Optics
  • Renewable Energy

Background:

  • Solar cell efficiency is limited by light reflection.
  • Antireflection (AR) coatings are crucial for maximizing light absorption.
  • Existing AR coatings often lack broadband and omnidirectional properties.

Purpose of the Study:

  • To design and fabricate an optimized graded-refractive-index (GRIN) AR coating.
  • To achieve broadband and omnidirectional reflection reduction for solar cell applications.
  • To compare the performance against conventional single-layer AR coatings.

Main Methods:

  • Utilized a genetic algorithm for AR coating optimization.
  • Fabricated a three-layer GRIN AR coating using TiO2 and nanoporous SiO2.

Related Experiment Videos

Last Updated: Jun 24, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

  • Employed oblique-angle deposition for layer fabrication.

    • Main Results:

    • Achieved a normal incidence reflectance of 3.9% (400-700 nm), a 37% reduction compared to Si3N4.
    • Demonstrated a 73% reflection reduction over 410-740 nm and 40-80 degrees incident angles.
    • Confirmed enhanced omnidirectionality and broadband characteristics.

    Conclusions:

    • The optimized three-layer GRIN AR coating offers superior performance for solar cells.
    • The fabrication method is effective for creating advanced optical coatings.
    • This technology has the potential to improve solar energy conversion efficiency.