ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF FABRICATING THE SAME
An organic light emitting display device and a method of fabricating the same capable of improving driving voltage and luminous efficiency. The OLED includes a substrate; a first electrode disposed on the substrate; an organic layer disposed on the first electrode and including an organic emission layer; and a second electrode disposed on the organic layer, and including a first metal layer and a second metal layer.
1 . An organic light emitting display device comprising:
a substrate;
a first electrode disposed on the substrate;
an organic layer disposed on the first electrode, and including an organic emission layer; and
a second electrode disposed on the organic layer, and including a first metal layer and a second metal layer.
2 . The organic light emitting display device according to claim 1 , wherein the first metal layer is formed of an Mg—Ag alloy.
3 . The organic light emitting display device according to claim 2 , wherein the Mg—Ag alloy has an atomic ratio of Mg:Ag ranging from 9:1 to 1:9.
4 . The organic light emitting display device according to claim 1 , wherein the second metal layer is formed of a metal selected from the group consisting of Al, Ag, Ti, Mo, and Pd.
5 . The organic light emitting display device according to claim 1 , wherein the first metal layer is formed to have a thickness ranging from about 50 Å to about 500 Å.
6 . The organic light emitting display device according to claim 1 , wherein the second metal layer is formed to have a thickness ranging from about 300 Å to about 3000 Å.
7 . The organic light emitting display device according to claim 1 , wherein the first metal layer is between the second metal layer and the organic layer.
8 . The organic light emitting display device according to claim 1 , wherein the second electrode is a cathode.
9 . The organic light emitting display device according to claim 1 , wherein the organic layer further comprises at least one layer selected from the group consisting of an electron injection layer, an electron transport layer, a hole injection layer, and a hole transport layer.
10 . A method of fabricating an organic light emitting display device, the method comprising:
providing a substrate;
forming a first electrode on the substrate;
forming an organic layer including an organic emission layer on the first electrode;
sequentially forming a first metal layer and a second metal layer on the organic layer.
11 . The method according to claim 10 , wherein the first metal layer is formed by co-depositing Mg and Ag.
12 . The method according to claim 10 , wherein the first metal layer is formed of Mg and Ag with an atomic ratio of Mg:Ag ranging from 9:1 to 1:9.
13 . An organic light emitting display device comprising:
a substrate;
a first electrode disposed on the substrate;
a first organic layer disposed on the first electrode, and including a first organic emission layer;
a second electrode disposed on the first organic layer, and including a first metal layer and a second metal layer;
a second organic layer disposed on the second electrode, and including a second organic emission layer; and
a third electrode disposed on the second organic layer.
14 . The organic light emitting display device according to claim 13 , wherein the first metal layer is formed of an Mg—Ag alloy.
15 . The organic light emitting display device according to claim 14 , wherein the Mg—Ag alloy has an atomic ratio of Mg:Ag of 9:1 to 1:9.
16 . The organic light emitting display device according to claim 13 , wherein the second metal layer is formed of a metal selected from the group consisting of Al, Ag, Ti, Mo, and Pd.
17 . The organic light emitting display device according to claim 13 , wherein the first metal layer is formed to have a thickness ranging from about 50 Å to about 500 Å.
18 . The organic light emitting display device according to claim 13 , wherein the second metal layer is formed to have a thickness ranging from about 300 Å to about 3000 Å.
19 . The organic light emitting display device according to claim 13 , wherein the first metal layer is between the second metal layer and the organic layer.
20 . The organic light emitting display device according to claim 13 , wherein the third electrode is formed of a material selected from the group consisting of ITO, IZO and ZnO.
21 . The organic light emitting display device according to claim 13 , wherein the second electrode is a cathode.
22 . The organic light emitting display device according to claim 13 , further comprising a thin film transistor electrically connected to the first electrode.
23 . The organic light emitting display device according to claim 13 , wherein the first electrode is electrically connected to the third electrode.
24 . The organic light emitting display device according to claim 13 , further comprising a thin film transistor electrically connected to the first electrode and the third electrode to drive both the first electrode and the third electrode.