Organic light emitting diode display device and method of fabricating the same

1. An organic light emitting diode (OLED) display device, comprising:

a substrate;

a first electrode arranged on the substrate;

an organic layer comprising an emission layer, the organic layer arranged on the first electrode; and

a second electrode comprising an ytterbium (Yb) only layer arranged on the organic layer and a silver (Ag) only layer arranged on the ytterbium layer, the Yb only layer having a thickness of 20 Å to 30 Å, and the Ag only layer having a thickness of 70 Å to 90 Å, wherein the second electrode has a sheet resistance of 45 ohm/square or less.

2. The device of claim 1 , wherein the second electrode has a transmittance of 46% to 90% within a wavelength range of 380 nm to 765 nm.

3. The device of claim 1 , wherein the emission layer is a white light emission layer.

4. The device of claim 3 , the white light emission layer has a structure, in which a plurality of emission layers emitting light of different wavelength regions are stacked.

5. The device of claim 3 , further comprising at least one of a color filter layer and a color conversion layer formed on the second electrode.

6. The device of claim 1 , wherein the emission layer is a blue light emission layer.

7. The device of claim 6 , further comprising a color conversion layer formed on the second electrode.

8. The device of claim 1 , wherein the emission layer comprises red, green, and blue light emission layers respectively formed in red, green, and blue pixel regions.

9. The device of claim 1 , wherein the first electrode comprises a reflective layer and a transparent electrode material arranged on the reflective layer.

10. The device of claim 9 , wherein the reflective layer is comprised of a material selected from a group consisting of silver (Ag), aluminum (Al), chrome (Cr), molybdenum (Mo), tungsten (W), titanium (Ti), gold (Au), palladium (Pd) and an alloy thereof.

11. A top-emitting organic light emitting diode (OLED) display device, comprising:

a substrate;

a first electrode arranged on the substrate, the first electrode comprising a reflective layer and a transparent electrode material arranged on the reflective layer;

an organic layer comprising an emission layer, the organic layer being arranged on the first electrode; and

a second electrode comprising an ytterbium (Yb) only layer arranged on the organic layer and a silver (Ag) only layer arranged on the ytterbium only layer, the Yb only layer having a thickness of 20 Å to 30 Å, and the Ag only layer having a thickness of 70 Å to 90 Å, wherein the second electrode has a sheet resistance of 45 ohm/square or less.

12. The device of claim 11 , wherein the second electrode has a transmittance of 46% to 90% within a wavelength range of 380 nm to 765 nm.

13. The device of claim 11 , wherein the emission layer is a white light emission layer.

14. A method of manufacturing an OLED display device, comprising:

providing a substrate;

forming a first electrode on the substrate;

forming an organic layer comprising an emission layer on the first electrode; and

forming a second electrode comprising an ytterbium (Yb) only layer on the organic layer and a silver (Ag) only layer on the ytterbium layer, wherein the Yb only layer has a thickness of 20 Å to 30 Å, and the Ag only layer has a thickness of 70 Å to 90 Å, wherein the second electrode has a sheet resistance of 45 ohm/square or less.

15. The method of claim 14 , wherein the second electrode is produced by a process selected from a group consisting of a sputtering process and a vacuum deposition process.

16. The method of 14 , wherein the first electrode is formed by forming a reflective layer on the substrate and stacking a transparent electrode material on the reflective layer.

17. The method of claim 14 , the wherein the emission layer is a white light emission layer.