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US 12,741,448 B2Granted
Encapsulation film
AssigneeLG Chem, Ltd.
InventorsYeong Bong Mok, Seung Min Lee, Sang Min Park, Sung Nam Moon, Se Woo Yang
Life of this patent
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Abstract
An encapsulation film, a method for manufacturing the same, an organic electronic device comprising the same, and a method for manufacturing the organic electronic device using the same are provided, where the encapsulation film allows forming a structure capable of blocking moisture or oxygen penetrating into an organic electronic device from outside and prevents generation of bright spots in the organic electronic device.
Claims16
An encapsulation film comprising an encapsulation layer which comprises a moisture adsorbent, a bright spot inhibitor and an encapsulation resin,
- wherein a value of the following General Formula 1 is in a range from 2.4 to 3.6 according to a particle size analysis of the moisture adsorbent and the bright spot inhibitor contained in a sample provided by dissolving the encapsulation layer in an organic solvent to form a solution and then filtering the solution through a 300-mesh nylon filter, and
- wherein the bright spot inhibitor has an adsorption energy of 0 eV or less for outgases as calculated by an approximation method of density functional theory,
- wherein the bright spot inhibitor comprises at least one selected from the group consisting of nickel, nickel oxide, and a magnesium-nickel alloy, and the moisture adsorbent comprises at least one selected from the group consisting of calcium oxide, magnesium oxide, and barium oxide,
- wherein when an entire surface or a cross-section of the encapsulation layer is viewed with a backscattered electron image at an acceleration voltage of 15k V through scanning electron microscope, an area of the moisture adsorbent and the bright spot inhibitor having a particle diameter of 100 nm to 20 μm is in a range of 20% or more and 70% or less of an area of all exposed surfaces of the encapsulation layer or the cross-section of the encapsulation layer, and the area occupied by the bright spot inhibitor is smaller than the area occupied by the moisture adsorbent, and
- wherein a ratio of D50 of the bright spot inhibitor to D50 of the moisture adsorbent is in a range of 0.15 or more to 2.0 or less:
- 1.8
- ×
- D
-
- 50
- +
- D
-
- 50
- D
-
- 10
- +
- D
-
- 90
- D
-
- 50
- General
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- Formula
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- 1
- wherein, D10 is a particle diameter corresponding to the volume accumulation 10% in the cumulative distribution of particles, D50 is a particle diameter corresponding to the volume accumulation 50% in the cumulative distribution of particles, D90 is a particle diameter corresponding to the volume accumulation 90% in the cumulative distribution of particles, and the unit for D10, D50, and D90 is μm, where the particle size analysis is a particle size distribution measured according to ISO13320:2009.
27 more elements
An encapsulation film comprising an encapsulation layer which comprises a moisture adsorbent, a bright spot inhibitor and an encapsulation resin,
- wherein a value of the following General Formula 1 is in a range from 2.4 to 3.6 according to a particle size analysis of the moisture adsorbent and the bright spot inhibitor contained in a sample provided by dissolving the encapsulation layer in an organic solvent to form a solution and then filtering the solution through a 300-mesh nylon filter,
- wherein the bright spot inhibitor has an adsorption energy of 0 eV or less for outgases, as calculated by an approximation method of density functional theory,
- wherein the bright spot inhibitor comprises nickel particles and the moisture adsorbent comprises calcium oxide,
- wherein when an entire surface or a cross-section of the encapsulation layer is viewed with a backscattered electron image at an acceleration voltage of 15k V through scanning electron microscope, an area of the moisture adsorbent and the bright spot inhibitor having a particle diameter of 100 nm to 20 μm is in a range of 20% or more and 70% or less of an area of all exposed surfaces of the encapsulation layer or the cross-section of the encapsulation layer and the area occupied by the bright spot inhibitor is smaller than the area occupied by the moisture adsorbent, and
- wherein a ratio of D50 of the bright spot inhibitor to D50 of the moisture adsorbent is in a range of 0.15 or more to 2.0 or less:
- 1.8
- ×
- D
-
- 50
- +
- D
-
- 50
- D
-
- 10
- +
- D
-
- 90
- D
-
- 50
- General
-
- Formula
-
- 1
- wherein, D10 is a particle diameter corresponding to the volume accumulation 10% in the cumulative distribution of particles, D50 is a particle diameter corresponding to the volume accumulation 50% in the cumulative distribution of particles, D90 is a particle diameter corresponding to the volume accumulation 90% in the cumulative distribution of particles, and the unit for D10, D50, and D90 is μm, where the particle size analysis is a particle size distribution measured according to ISO13320:2009.
27 more elements
Dependencies are inferred from the claim text.