Organic light emitting diode display
View Patent ↗An organic light emitting diode (OLED) display includes a first electrode including a conductive black layer, a second electrode facing the first electrode, and an organic emission layer provided between the first electrode and the second electrode.
1. An organic light emitting diode display device, comprising:
a first electrode including a first electrically conductive layer bearing a black coating of an electrically conductive metal sulfide;
a second electrode facing the first electrode; and
an organic emission layer provided between the first electrode and the second electrode.
2. The organic light emitting diode display device of claim 1 , wherein the first electrically conductive layer provided between the black coating and the organic emission layer.
3. The organic light emitting diode display device of claim 2 , wherein the first electrically conductive layer has a lesser work function than the second electrode.
4. The organic light emitting diode display device of claim 3 , wherein the first electrically conductive layer is light reflective.
5. The organic light emitting diode display device of claim 4 , wherein the first electrically conductive layer is thinner than the black coating.
6. The organic light emitting diode display device of claim 2 , wherein the first electrically conductive layer has a greater work function than the second electrode.
7. The organic light emitting diode display device of claim 6 , wherein the first electrically conductive layer is light opaque.
8. The organic light emitting diode display device of claim 2 , wherein the first electrode further includes a second electrically conductive layer separated from the organic emission layer with the black coating disposed therebetween.
9. The organic light emitting diode display device of claim 8 , wherein the black coating is formed by heat treating the second conductive layer under a sulfur (S) atmosphere.
10. The organic light emitting diode display device of claim 1 , wherein the black coating includes silver sulfide (Ag 2 S).
11. An organic light emitting diode display device, comprising:
a first substrate;
a second substrate facing the first substrate; and
an organic light emitting element provided between the first substrate and the second substrate, and including a first electrode including a first electrically conductive layer bearing a black coating of an electrically conductive metal sulfide, a second electrode facing the first electrode, and an organic emission layer provided between the first electrode and the second electrode.
12. The organic light emitting diode display device of claim 2 , wherein a reflectance of the black coating is in a range of 0% to 10%.
13. The organic light emitting diode display device of claim 2 , wherein a transmittance of the first electrically conductive layer is in a range of 10% to 99%.
14. The organic light emitting diode display device of claim 2 , wherein a reflectance of the black coating is less than a reflectance of the first electrically conductive layer.
15. An electrode of an organic light emitting diode display device having a metal layer bearing a black coating of a metal sulfide.
16. The electrode of claim 15 , wherein the metal sulfide is silver sulfide (Ag 2 S).
17. The electrode of claim 15 , wherein the metal sulfide is formed by heat treating a metal under sulfur (S) atmosphere.