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Devices and methods to improve light outcoupling from an OLED array

  • US 9,496,523 B1
  • Filed: 06/19/2015
  • Issued: 11/15/2016
  • Est. Priority Date: 06/19/2015
  • Status: Active Grant
First Claim
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1. A device, comprising:

  • a substrate;

    an organic light emitting diode (OLED) disposed over the substrate;

    a first layer optically coupled to the OLED and having a first surface including a first plurality of topographical surface features and an index of refraction n1; and

    an enhancement layer optically coupled to the OLED and vertically stacked with the first layer, having a thickness of not more than 100 nm, a second surface including a second plurality of topographical surface features, and an index of refraction n2,wherein n2 has at least a 0.1 difference from an index of refraction of a top layer and a bottom layer adjacent to the enhancement layer.

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