US 11,690,249 B2
Light extraction substrate of organic light-emitting device and method of fabricating the same
Hong Yoon, Asan-si (KR)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/56,922
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed May 24, 2019, PCT No. PCT/US2019/033901
§ 371(c)(1), (2) Date Nov. 19, 2020,
PCT Pub. No. WO2019/231841, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 10-2018-0060322 (KR), filed on May 28, 2018.
Prior Publication US 2021/0210732 A1, Jul. 8, 2021
Int. Cl. H01L 51/52 (2006.01); 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, comprising:
abase substrate;
a light-scattering layer disposed on the base substrate, and comprising a first material, the light-scattering layer comprising a first surface facing the base substrate, and a second surface opposite the first surface, a number of holes formed in the light-scattering layer, each of the number of holes extending between the first surface and the second surface; and
a planarization layer disposed on the light-scattering layer, and comprising a second material,
wherein refractive indices of the first material and the second material range from 1.8 to 2.6,
wherein each of the number of holes comprises a diameter and the diameters of the number of holes range from 350 nm to 450 nm when measured on a plane perpendicular to a thickness direction of the light-scattering layer,
a ratio of an area that the number of holes occupy in the first surface to an area of the first surface is at least 40%, and
a thickness of the planarization layer is 200 nm or less.