CPC H10K 50/854 (2023.02) [H10K 71/00 (2023.02)] | 12 Claims |
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.
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