Light extraction substrate and organic light-emitting device including same
Provided is a light extraction substrate disposed on a front portion of an organic light-emitting diode (OLED) to extract light from the OLED. The light extraction substrate includes abase substrate and a light extraction layer disposed on the base substrate. The light extraction layer includes a matrix layer and BaTiO 3 light-scattering particles dispersed in the matrix layer. The matrix layer contains a siloxane-based organic-inorganic hybrid material. An organic light-emitting device includes the light extraction substrate and an OLED disposed on the light extraction layer of the light extraction substrate.
1 . A light extraction substrate disposed on a front portion of an organic light-emitting diode to extract light from the organic light-emitting diode, the light extraction substrate comprising:
a base substrate; and
a light extraction layer disposed on the base substrate,
wherein the light extraction layer comprises a matrix layer and BaTiO 3 light-scattering particles dispersed in the matrix layer, and wherein the BaTiO 3 light-scattering particles have an average particle size ranging from greater than 350 nm to less than 500 nm, and wherein the thickness of the matrix layer is two times the average particle size of the BaTiO 3 light-scattering particles.
2 . The light extraction substrate of claim 1 , wherein the matrix layer comprises a siloxane-based organic-inorganic hybrid material.
3 . The light extraction substrate of claim 1 , wherein the BaTiO 3 light-scattering particles have a light absorption rate of 10% or lower for any one or more of light with a wavelength ranging from 380 nm to 420 nm, light with a wavelength ranging from 420 nm to 450 nm, and light with a wavelength ranging from 450 nm to 490 nm.
4 . The light extraction substrate of claim 3 , wherein the BaTiO 3 light-scattering particles have a light absorption rate of 7% or lower for any one or more of light with a wavelength ranging from 380 nm to 420 nm, light with a wavelength ranging from 420 nm to 450 nm, and light with a wavelength ranging from 450 nm to 490 nm.
5 . The light extraction substrate of claim 1 , wherein the BaTiO 3 light-scattering particles have an average particle size from 400 nm to less than 500 nm.
6 . The light extraction substrate of claim 1 , wherein the matrix layer has a light absorption rate of 1% or lower for any one or more of light with a wavelength ranging from 380 nm to 420 nm, light with a wavelength ranging from 420 nm to 450 nm, and light with a wavelength ranging from 450 nm to 490 nm.
7 . The light extraction substrate of claim 1 , wherein the light extraction layer has a light absorption rate of 40% or lower for light with a wavelength ranging from 380 nm to 420 nm, 15% or lower for light with a wavelength ranging from 420 nm to 450 nm, and 10% or lower for light with a wavelength ranging from 450 nm to 490 nm.
8 . The light extraction substrate of claim 7 , wherein the light extraction layer has a light absorption rate of 30% or lower for light with a wavelength ranging from 380 nm to 420 nm, 10% or lower for light with a wavelength ranging from 420 nm to 450 nm, and 10% or lower for light with a wavelength ranging from 450 nm to 490 nm.
9 . The light extraction substrate of claim 1 , wherein the light extraction layer has a haze of 60% or higher.
10 . An organic light-emitting device comprising:
the light extraction substrate as recited in any one of claims 1-4 or 5-9 ; and
an organic light-emitting diode disposed on the light extraction layer of the light extraction substrate.