LIGHT TRAPPING AND ANTIREFLECTIVE COATINGS
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United States of America Patent
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Issued Date -
Jul 3, 2014
app pub date -
Dec 27, 2012
filing date -
Dec 27, 2012
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Abstract
Light trapping and antireflection coatings are described, together with methods for preparing the coatings. An exemplary method comprises forming a light trapping coating on a substrate and a conformal antireflection coating on the light trapping coating. The light trapping coating comprises particles embedded in a support matrix having a thickness between about one third and two thirds of the mean particle size. The mean particle size is between about 10 μm and about 500 μm. The index of refraction of the particles and support matrix is substantially the same as the index of refraction of the substrate at wavelengths of interest. The index of refraction of the conformal antireflection coating is approximately equal the square root of the index of refraction of the substrate.
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