Organic light-emitting display device

1. An organic light-emitting display device comprising:

a substrate;

a plurality of thin film transistors (TFTs) on the substrate;

a plurality of first electrodes respectively on the TFTs;

a pixel-defining layer between the first electrodes, the pixel-defining layer including a covered portion and an uncovered portion;

a plurality of organic layers respectively on the first electrodes, each organic layer including an emission layer;

a second electrode covering at least a part of the organic layers and the pixel-defining layer, a portion of the pixel-defining layer covered by the second electrode defining the covered portion,

wherein at least one outgassing hole is in the uncovered portion of the pixel-defining layer, the uncovered portion being an exposed area of the pixel-defining layer.

2. The organic light-emitting display device of claim 1 , wherein a plurality of outgassing holes are in the uncovered portion of the pixel-defining layer.

3. The organic light-emitting display device of claim 1 , wherein the covered portion covered by the second electrode is different from the uncovered portion in which the at least one outgassing hole is defined.

4. The organic light-emitting display device of claim 1 , further comprising:

a planarization layer between the TFTs and the pixel-defining layer, the planarization layer covering the TFTs,

wherein the at least one outgassing hole exposes at least a part of the planarization layer.

5. The organic light-emitting display device of claim 1 , wherein the covered portion of the pixel-defining layer and the uncovered portion of the pixel-defining layer consist of different portions of the pixel-defining layer.

6. An organic light-emitting display device, comprising:

at least one thin film transistor (TFT) on a substrate, the TFT including an active layer, a gate electrode insulated from the active layer, and source and drain electrodes contacting opposing sides of a semiconductor active layer;

a planarization layer on the at least one TFT and covering the at least one TFT;

at least one first electrode on the planarization layer and electrically connected to the at least one TFT;

at least one organic layer formed on the at least one first electrode, the at least one organic layer including an emission layer;

a second electrode facing the at least one first electrode; and

a pixel-defining layer covering an edge portion of the at least one first electrode;

wherein an outgassing hole is in an edge area of the pixel-defining layer and exposes at least a part of the planarization layer.

7. The organic light-emitting display device of claim 6 , wherein the outgassing hole is in the pixel-defining layer in an area where the second electrode is not formed.

8. The organic light-emitting display device of claim 7 , wherein the outgassing hole is formed in an upper portion of the pixel-defining layer.

9. The organic light-emitting display device of claim 6 , wherein the second electrode is on a portion of the pixel-defining layer that is different from a portion of the pixel-defining layer in which the outgassing hole is defined.

10. The organic light-emitting display device of claim 6 , further including a common power supply line, the common power supply line including a material that is the same as a material included in the gate electrode and is on a same plane as the gate electrode.

11. The organic light-emitting display device of claim 6 , further including a common power supply line, the common power supply line including a material that is the same as a material included in the source and drain electrodes on the substrate.

12. The organic light-emitting display device of claim 6 , wherein ends of the second electrode are spaced from an edge area of the pixel-defining layer.

13. An organic light-emitting display device, comprising:

a substrate;

a display area including a plurality of TFTs on the substrate, a plurality of first electrodes electrically connected to the TFTS, and a plurality of organic layers on the first electrodes, each of the plurality of organic layers including an emission layer;

a cathode area including the display area and a second electrode facing the first electrode; and

a pixel-defining layer covering at least a part of the first electrode and including at least one outgassing hole, the pixel-defining layer having an area that is outside the cathode area and another area that includes the cathode area, the at least one outgassing hole being in the area of the pixel-defining layer that is outside the cathode area.

14. The organic light-emitting display device of claim 13 , wherein the at least one outgassing hole is in a portion of the pixel-defining layer that is different from a portion of the pixel-defining layer covered by the second electrode.

15. The organic light-emitting display device of claim 13 , wherein the area of the pixel-defining layer including the cathode area is different from the area of the pixel-defining layer including the at least one outgassing hole.