Display device

1. A display device comprising:

a display substrate;

a pixel-defining layer located on the display substrate and comprising a plurality of opening exposing a plurality of light-emitting regions; and

a plurality of light-emitting devices located in the plurality of light-emitting regions, respectively,

wherein each of the plurality of light-emitting devices comprises a pixel electrode, a common electrode, and an organic light-emitting portion between the pixel electrode and the common electrode,

wherein the pixel-defining layer comprises a first inner side surface and a second inner side surface facing each other in each of the plurality of light-emitting regions, and

wherein the pixel electrode is on the first inner side surface and the common electrode is on the second inner side surface.

2. The display device of claim 1 , further comprising:

a barrier rib located in each of the plurality of light-emitting regions, partitioning each of the plurality of light-emitting regions into a first area and a second area, and having a height less than a thickness of the pixel-defining layer,

wherein the pixel electrode is located in the first area and the common electrode is located in the second area.

3. The display device of claim 2 , wherein, in each of the plurality of light-emitting regions, the pixel-defining layer further comprises a third inner side surface and a fourth inner side surface which connect the first inner side surface to the second inner side surface and face each other, and

the barrier rib extends from the third inner side surface to the fourth inner side surface.

4. The display device of claim 3 , wherein the second electrode extends on an upper surface of the pixel-defining layer and is integrally formed with the plurality of light-emitting devices.

5. The display device of claim 4 , wherein the plurality of openings overlap the plurality of light-emitting regions and are larger than the plurality of light-emitting regions, and

each of the plurality of openings is spaced apart from the first inner side surface, the third inner side surface, and the fourth inner side surface at the upper surface of the pixel-defining layer.

6. The display device of claim 2 , further comprising:

a first functional layer between the pixel electrode and the organic light-emitting portion and a second functional layer between the common electrode and the organic light-emitting portion.

7. The display device of claim 6 , wherein the first functional layer is located in the first area, the second functional layer is located in the second area, and the organic light-emitting portion is continuously located over the first area and the second area.

8. The display device of claim 6 , wherein the first functional layer comprises a hole injection layer and a hole transport layer, and the second functional layer comprises an electron injection layer and an electron transport layer.

9. The display device of claim 6 , wherein each of the first functional layer and the second functional layer has a constant thickness at a height equal to or greater than the barrier rib.

10. The display device of claim 2 , wherein the display substrate comprises a base substrate, a thin-film transistor on the base substrate, and a passivation layer on the thin-film transistor,

wherein the pixel-defining layer is located on the passivation layer, and

the first electrode extends on a bottom surface of the first area and is electrically connected to the thin-film transistor through a contact hole.

11. A display device comprising:

a display substrate;

a pixel-defining layer located on the display substrate and comprising a plurality of openings exposing a plurality of light-emitting regions;

a barrier rib located in each of the plurality of light-emitting regions and partitioning each of the plurality of light-emitting regions into a first area and a second area; and

a plurality of light-emitting devices located in the plurality of light-emitting regions, respectively,

wherein each of the plurality of light-emitting devices comprises a first electrode and a second electrode arranged to face each other, and

wherein the first electrode is located in the first area, and the second electrode is located in the second area.

12. The display device of claim 11 , wherein, in each of the plurality of light-emitting regions, the pixel-defining layer further comprises a first inner side surface and a second inner side surface facing each other, and a third inner side surface and a fourth inner side surface which connect the first inner side surface to the second inner side surface and face each other, and

the barrier rib extends from the third inner side surface to the fourth inner side surface.

13. The display device of claim 12 , wherein the first electrode is located on the first inner side surface and the second electrode is located on the second inner side surface.

14. The display device of claim 13 , further comprising:

a first functional layer on the first electrode, a second functional layer on the second electrode, and an organic light-emitting portion between the first functional layer and the second functional layer.

15. The display device of claim 14 , wherein a height of the barrier rib is less than a thickness of the pixel-defining layer, and

each of the first functional layer and the second functional layer has a constant thickness at a height equal to or greater than the barrier rib.

16. The display device of claim 15 , wherein the first functional layer covers a surface of the first electrode and a first side of the surface of the barrier rib facing the first electrode,

the second functional layer covers a surface of the second electrode and a second side of the surface of the barrier rib facing the second electrode,

the first functional layer and the second functional layer are separated from each other by the barrier rib, and

the organic light-emitting portion is continuously located over the first area and the second area.

17. The display device of claim 13 , wherein the display substrate comprises a base substrate, a thin-film transistor on the base substrate, and a passivation layer on the thin-film transistor, and

the pixel-defining layer is on the passivation layer.

18. The display device of claim 17 , wherein the first electrode extends on a bottom surface of the first area and is electrically connected to the thin-film transistor through a contact hole in the first area.

19. The display device of claim 13 , wherein the second electrode extends on an upper surface of the pixel-defining layer and is integrally formed with the plurality of light-emitting devices.

20. The display device of claim 19 , wherein the plurality of openings overlap the plurality of light-emitting regions, and

each of the plurality of openings is separated from the first inner side surface, the third inner side surface, and the fourth inner side surface at the upper surface of the pixel-defining layer.