Organic electroluminescent device and method of preparing the same
First Claim
1. An organic electroluminescent device, comprising:
- a substrate;
an organic electroluminescent unit formed on the substrate, the organic electroluminescent unit comprising a first electrode, a second electrode and an organic luminescent unit interposed between the first electrode and the second electrode;
a sealing substrate joined with the substrate to seal the organic electroluminescent unit; and
a sealing layer formed on the sealing substrate, the sealing layer comprising a cohesion layer to attach the sealing layer to the sealing substrate, a transparent polymer layer on the cohesion layer, and a transparent moisture absorption layer on the transparent polymer layer to absorb moisture in a sealed space formed by joining the sealing substrate with the substrate.
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Abstract
An organic electroluminescent device and a method of preparing the same are provided. The organic electroluminescent device includes a sealing layer which is formed on a sealing substrate, and which includes a cohesion layer, a transparent polymer layer, and a transparent moisture absorption layer. Since the transparent moisture absorption layer of the organic electroluminescent device is provided to a sealing substrate using an attaching method, the organic electroluminescent device has an improved life span property due to a firm sealed structure and better light extraction efficiency due to the transparent moisture absorption layer below the sealing substrate.
19 Citations
20 Claims
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1. An organic electroluminescent device, comprising:
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a substrate;
an organic electroluminescent unit formed on the substrate, the organic electroluminescent unit comprising a first electrode, a second electrode and an organic luminescent unit interposed between the first electrode and the second electrode;
a sealing substrate joined with the substrate to seal the organic electroluminescent unit; and
a sealing layer formed on the sealing substrate, the sealing layer comprising a cohesion layer to attach the sealing layer to the sealing substrate, a transparent polymer layer on the cohesion layer, and a transparent moisture absorption layer on the transparent polymer layer to absorb moisture in a sealed space formed by joining the sealing substrate with the substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of preparing an organic electroluminescent device, the method comprising:
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forming a sealing layer composed of a cohesion layer, a transparent polymer layer, and a transparent moisture absorption layer;
attaching the sealing layer to a sealing substrate;
preparing a substrate on which an organic electroluminescent unit is formed, the organic electroluminescent unit comprising a first electrode, a second electrode and an organic luminescent unit interposed between the first electrode and the second electrode;
applying a sealant to at least one of the sealing substrate and the substrate on which the organic electroluminescent unit is formed; and
joining the sealing substrate with the substrate to form a sealed space in which the organic luminescent unit is positioned. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An organic electroluminescent device, comprising:
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a substrate on which an organic electroluminescent unit is formed, the organic electroluminescent unit comprising a first electrode, a second electrode and an organic luminescent unit interposed between the first electrode and the second electrode;
a sealing substrate joined with the substrate via a sealant to produce a sealed space in which the organic luminescent unit is positioned; and
a sealing layer attached to the sealing substrate, the sealing layer comprising a cohesion layer, a transparent polymer layer and a transparent moisture absorption layer to absorb moisture in the sealed space. - View Dependent Claims (20)
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Specification