US 12,408,510 B2
Light extraction substrate of organic light-emitting device and method of manufacturing the same
JooYoung Lee, Anyang-si (KR)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Dec. 16, 2022, as Appl. No. 18/082,834.
Application 18/082,834 is a continuation of application No. 17/054,349, granted, now 11,653,526, previously published as PCT/US2019/032251, filed on May 14, 2019.
Claims priority of application No. 10-2018-0055483 (KR), filed on May 15, 2018.
Prior Publication US 2023/0118365 A1, Apr. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H10K 50/854 (2023.01); H10K 71/00 (2023.01)
CPC H10K 50/854 (2023.02) [H10K 71/00 (2023.02)] 12 Claims
OG exemplary drawing
 
1. A light extraction substrate of an organic light-emitting device, the light extraction substrate comprising:
a base substrate;
a porous light-scattering layer formed on the base substrate, comprising a first material, and having a plurality of holes formed therein;
a planarization layer formed on the light-scattering layer, and comprising a second material; and
a plurality of scattering structures comprising the second material, the plurality of scattering structures formed by the second material infiltrated from the planarization layer into the light-scattering layer such that the second material of the plurality of scattering structures fills at least 5% of a total volume of the plurality of holes,
wherein at least a part of the plurality of scattering structures has voids formed therein, and wherein the light-scattering layer comprises localized sites, each of the localized sites having a refractive index n expressed by the formula:
1<n<(1−x)*n1+x*n2,
wherein n1 is a refractive index of the first material, where n1>1, n2 is a refractive index of the second material, where n1>n2>1, 1 is a refractive index of air, and x is a ratio of a volume of the second material filling the holes in the localized sites with respect to a volume of the holes in the localized sites, where 0<x<1.