Organic light-emitting display apparatus
An organic light-emitting display apparatus is disclosed. In one embodiment, the display apparatus includes i) a substrate and ii) an organic light-emitting device formed on the substrate, the organic light-emitting device including a stack structure including a first electrode, an organic light-emitting layer, and a second electrode. The apparatus may further include a sealing layer formed on the substrate so as to cover the organic light-emitting device, the sealing layer including an inorganic layer and a porous layer interposed between the sealing layer and the organic light-emitting device. One embodiment can reduce a stress due to a sealing inorganic layer so as to maintain characteristics for a long time in a severe environment and not affect an organic light-emitting device.
1. An organic light-emitting display apparatus comprising:
a substrate;
an organic light-emitting device disposed over the substrate, wherein the organic light-emitting device has a stack structure which comprises a first electrode, a second electrode, and an organic light-emitting layer between the first electrode and the second electrode;
a sealing layer disposed over the substrate so as to cover the organic light-emitting device, wherein the sealing layer comprises an inorganic layer and an organic layer stacked with each other;
a porous layer interposed between the sealing layer and the organic light-emitting device; and
a capping layer interposed between the porous layer and the organic light-emitting device, wherein the capping layer directly contacts the second electrode,
wherein the inorganic layer is disposed directly on the porous layer to form a boundary therebetween,
wherein the porous layer is disposed directly on the capping layer,
wherein the inorganic layer and the capping layer are not porous,
wherein the porous layer comprises a material selected from the group consisting of SiNx, SiOx, SiCN, SiON, LiF and combinations thereof, and
wherein the capping layer comprises an organic material.
2. The organic light-emitting display apparatus of claim 1 , wherein the porous layer contacts the second electrode of the organic light-emitting device.
3. The organic light-emitting display apparatus of claim 1 , wherein the porous layer comprises LiF.
4. The organic light-emitting display apparatus of claim 1 , wherein the inorganic layer of the sealing layer is thicker than the porous layer.
5. The organic light-emitting display apparatus of claim 1 , wherein the porous layer is thicker than the inorganic layer of the sealing layer.
6. The organic light-emitting display apparatus of claim 1 , wherein the porous layer further comprises an organic material.
7. The organic light-emitting display apparatus of claim 1 , wherein the porous layer comprises a third porous layer having a density that is different from densities of a first porous layer and a second porous layer of the porous layer, and
wherein the first to third porous layers define a density gradient in which the density of the porous layer increases in a direction from the organic light-emitting device towards the sealing layer.
8. An organic light-emitting display apparatus comprising:
a substrate;
an organic light-emitting device disposed over the substrate, wherein the organic light-emitting device has a stack structure which comprises a first electrode, a second electrode, and an organic light-emitting layer between the first electrode and the second electrode;
a first layer over the organic light-emitting device, wherein the first layer comprises a porous layer;
a second layer disposed over the substrate so as to cover the organic light-emitting device and the first layer, wherein the second layer contacts the first layer; and
a capping layer interposed between the first layer and the organic light-emitting device, wherein the capping layer directly contacts the second electrode,
wherein the second layer is disposed over the first layer and comprises an inorganic layer and an organic layer stacked with each other,
wherein the inorganic layer is disposed directly on the porous layer to form a boundary therebetween,
wherein the porous layer is disposed directly on the capping layer,
wherein the inorganic layer and the capping layer are not porous,
wherein the porous layer comprises a material selected from the group consisting of SiNx, SiOx, SiCN, SiON, LiF and combinations thereof, and
wherein the capping layer comprises an organic material.
9. The organic light-emitting display apparatus of claim 8 , wherein the first layer contacts the second electrode of the organic light-emitting device.
10. The organic light-emitting display apparatus of claim 8 , wherein the porous layer comprises LiF.
11. The organic light-emitting display apparatus of claim 8 , wherein the inorganic layer of the second layer is thicker than the porous layer.
12. The organic light-emitting display apparatus of claim 8 , wherein the porous layer is thicker than the inorganic layer of the second layer.
13. The organic light-emitting display apparatus of claim 8 , wherein the porous layer further comprises an organic material.