Organic electroluminescent device having a transparent layer
View Patent ↗An organic electroluminescent device, including a substrate, a first electrode layer formed on the substrate, and a second electrode layer formed on the first electrode layer. An organic layer, having a light-emitting layer, is interposed between the first electrode layer and the second electrode layer, and a transparent layer is formed on the second electrode layer. Damage to the organic layer may be prevented while maintaining a transmittance of the second electrode layer.
1. An organic electroluminescent (EL) device, comprising:
a substrate;
a first electrode layer formed on the substrate;
a second electrode layer formed on the first electrode layer;
an organic layer interposed between the first electrode layer and the second electrode layer; and
a transparent layer formed on the second electrode layer and arranged between the organic layer and a side of the organic EL device from which light is emitted, wherein the transparent layer comprises a material having a non-variable resistance.
2. The organic EL device of claim 1 , wherein the transparent layer is formed like an island or a stripe.
3. The organic EL device of claim 1 , wherein the transparent layer is made of Li, Ca, LiF/Ca, LiF/Al, Al, Mg, or Mg alloy.
4. The organic EL device of claim 1 , wherein the transparent layer is made of a transparent insulating material.
5. The organic EL device of claim 4 , wherein the transparent layer is within a range of about 30 Å to about 1,000 Å thick.
6. The organic EL device of claim 4 , wherein the transparent layer has an area larger than an emitting area of the organic layer and smaller than a single pixel area.
7. The organic EL device of claim 4 , further comprising:
an auxiliary electrode layer formed on the transparent layer,
wherein the auxiliary electrode layer is made of ITO, IZO, ZnO, or In 2 O 3 , and
wherein the auxiliary electrode layer is coupled to the second electrode layer.
8. The organic EL device of claim 4 , further comprising:
a bus electrode line formed on the transparent layer,
wherein the bus electrode line is coupled to the second electrode layer.
9. The organic EL device of claim 1 , wherein the transparent layer is made of a transparent conductive material.
10. The organic EL device of claim 9 , wherein the transparent layer is within a range of about 30 Å to about 1,500 Å thick.
11. The organic EL device of claim 9 , wherein the transparent conductive material is a conductive organic material.
12. The organic EL device of claim 11 , wherein the transparent layer is within a range of about 100 Å to about 1,500 Å thick.
13. The organic EL device of claim 9 , wherein the transparent conductive material is a metal.
14. The organic EL device of claim 13 , wherein the transparent layer is within a range of about 30 Å to about 1,000 Å thick.
15. The organic EL device of claim 9 , further comprising:
an auxiliary electrode layer formed on the transparent layer, wherein the auxiliary electrode layer is made of ITO, IZO, ZnO, or In 2 O 3 , and
wherein the auxiliary electrode layer is coupled to the second electrode layer.
16. The organic EL device of claim 9 , further comprising:
a bus electrode line formed on the transparent layer,
wherein the bus electrode line is coupled to the second electrode layer.
17. The organic EL device of claim 1 , wherein the second electrode layer is a metal thin film within the range of about 40 Å to about 200 Å thick.
18. The organic EL device of claim 1 , further comprising:
an auxiliary electrode layer formed on the transparent layer, wherein the auxiliary electrode layer is made of ITO, IZO, ZnO, or In 2 O 3 , and
wherein the auxiliary electrode layer is coupled to the second electrode layer.
19. The organic EL device of claim 1 , further comprising:
a bus electrode line formed on the transparent layer,
wherein the bus electrode line is coupled to the second electrode layer.
20. The organic EL device of claim 1 , wherein the second electrode layer is a transparent electrode.
21. The organic EL device of claim 1 , wherein the transparent layer comprises an opening exposing the second electrode layer.
22. The organic EL device of claim 21 , further comprising:
an auxiliary electrode layer formed on the transparent layer,
wherein the auxiliary electrode layer is made of ITO, IZO, ZnO, or In 2 O 3 , and
wherein the auxiliary electrode layer is coupled to the second electrode layer via the opening.
23. The organic EL device of claim 21 , further comprising:
a bus electrode line formed on the transparent layer,
the bus wherein electrode line is coupled to the second electrode layer via the opening.