Organic light emitting diode and display device using the same
View Patent ↗The present invention relates to an organic light emitting diode, comprising: a first electrode; a second electrode; an organic material layer which is interposed between the first electrode and the second electrode; and a light extraction layer which is disposed on the first electrode or under the second electrode, wherein the light extraction layer has a wave surface. The present invention also relates to a display device which comprises the above-mentioned organic light emitting diode.
1. An organic light emitting diode, comprising:
a first electrode;
a second electrode;
an organic material layer which is interposed between the first electrode and the second electrode; and
a light extraction layer which is disposed on the first electrode or under the second electrode,
wherein the light extraction layer has a wave surface, the wave surface of the light extraction layer is formed by evaporating an organic material, and the organic material has a molecular weight between 100 g/mol and 500 g/mol.
2. The organic light emitting diode as claimed in claim 1 , wherein a roughness of the wave surface is 10 nm to 200 nm.
3. The organic light emitting diode as claimed in claim 1 , wherein a thickness of the light extraction layer is 10 nm to 500 nm.
4. The organic light emitting diode as claimed in claim 1 , wherein the light extraction layer is disposed on the first electrode and the wave surface is formed on a side opposite to a side of the light extraction layer facing to the first electrode.
5. The organic light emitting diode as claimed in claim 4 , wherein the organic light emitting diode further comprises a passivation layer disposed on the light extraction layer.
6. The organic light emitting diode as claimed in claim 5 , wherein the passivation layer has a wave surface and a roughness of the undulating surface is 50 nm to 200 nm.
7. The organic light emitting diode as claimed in claim 1 , wherein the light extraction layer is disposed under the second electrode and the wave surface is formed on a side of the light extraction layer facing to the second electrode.
8. A display device, comprising:
a substrate;
an organic light emitting diode, which is disposed on the substrate and comprises:
a first electrode;
a second electrode;
an organic material layer which is interposed between the first electrode and the second electrode; and
a light extraction layer which is disposed on the first electrode or under the second electrode,
wherein the light extraction layer has a wave surface, the wave surface of the light extraction layer is formed by evaporating an organic material, and the organic material has a molecular weight between 100 g/mol and 500 g/mol.
9. The display device as claimed in claim 8 , wherein a roughness of the wave surface is 10 nm to 200 nm.
10. The display device as claimed in claim 8 , wherein a thickness of the light extraction layer is 10 nm to 500 nm.
11. The display device as claimed in claim 8 , wherein the light extraction layer is disposed on the first electrode and the wave surface is formed on a side opposite to a side of the light extraction layer facing to the first electrode.
12. The display device as claimed in claim 11 , wherein the organic light emitting diode further comprises a passivation layer disposed on the light extraction layer.
13. The display device as claimed in claim 12 , wherein the passivation layer has a wave surface and a roughness of the undulating surface is 50 nm to 200 nm.
14. The display device as claimed in claim 8 , wherein the light extraction layer is disposed under the second electrode and the wave surface is formed on a side of the light extraction layer facing to the second electrode.