DISPLAY DEVICE
According to one embodiment, a display device includes a lower electrode, a rib which has a pixel aperture overlapping the lower electrode and covers an end portion of the lower electrode, a partition which includes a bottom portion the rib, a lower portion on the bottom portion, and an upper portion on the lower portion and protruding from a side surface of the lower portion, an organic layer which is in contact with the lower electrode through the pixel aperture, an upper electrode which covers the organic layer and is in contact with at least one of the bottom portion and the lower portion, and a transparent conductive oxide layer provided between the rib and the bottom portion.
1 . A display device comprising:
a lower electrode;
a rib which has a pixel aperture overlapping the lower electrode and covers an end portion of the lower electrode;
a partition which includes a bottom portion provided on the rib, a lower portion provided on the bottom portion, and an upper portion provided on the lower portion and protruding from a side surface of the lower portion;
an organic layer which is in contact with the lower electrode through the pixel aperture and emits light based on application of voltage;
an upper electrode which covers the organic layer and is in contact with at least one of the bottom portion and the lower portion; and
a transparent conductive oxide layer provided between the rib and the bottom portion.
2 . The display device of claim 1 , wherein
the conductive oxide layer is formed of amorphous ITO, IZO or IGZO.
3 . The display device of claim 1 , wherein
the rib is formed of silicon nitride, silicon oxide or silicon oxynitride.
4 . The display device of claim 1 , wherein
an end portion of the bottom portion protrudes from an end portion of the conductive oxide layer.
5 . The display device of claim 1 , wherein
the organic layer includes a hole injection layer which is in contact with the lower electrode, and
a thickness of the conductive oxide layer is greater than a thickness of the hole injection layer.
6 . The display device of claim 5 , wherein
the organic layer further includes a hole transport layer which covers the hole injection layer, and
the thickness of the conductive oxide layer is less than a total thickness of the hole injection layer and the hole transport layer.
7 . The display device of claim 1 , wherein
the lower electrode includes:
a reflective layer formed of a metal material; and
a coating layer formed of a transparent conductive oxide whose crystallinity is higher than the conductive oxide layer, and covering an upper surface of the reflective layer.
8 . The display device of claim 1 , wherein
an end portion of the bottom portion protrudes from an end portion of the conductive oxide layer, and
the bottom portion and the lower portion are formed of different materials.
9 . The display device of claim 1 , wherein
the end portion of the lower electrode overlaps the lower portion.
10 . The display device of claim 1 , wherein
the upper portion includes a first top layer provided on the lower portion, and a second top layer provided on the first top layer,
the first top layer and the second top layer are formed of different materials, and
an end portion of the first top layer protrudes from an end portion of the second top layer.
11 . The display device of claim 1 , wherein
the organic layer is spaced apart from the lower portion.
12 . The display device of claim 1 , wherein
an end portion of the conductive oxide layer does not overlap the lower portion.
13 . The display device of claim 1 , wherein
the organic layer includes a hole injection layer which is contact with the lower electrode, and
an end portion of the conductive oxide layer overlaps the hole injection layer.
14 . The display device of claim 1 , wherein
an end portion of the conductive oxide layer overlaps the upper electrode.
15 . A display device comprising:
a lower electrode;
a rib which has a pixel aperture overlapping the lower electrode and covers an end portion of the lower electrode;
a partition which includes a bottom portion provided on the rib, a lower portion provided on the bottom portion, and an upper portion provided on the lower portion and protruding from a side surface of the lower portion;
an organic layer which is in contact with the lower electrode through the pixel aperture and emits light based on application of voltage;
an upper electrode which covers the organic layer and is in contact with at least one of the bottom portion and the lower portion; and
a transparent conductive oxide layer which is provided between the lower electrode and the rib and has an aperture overlapping the pixel aperture.
16 . The display device of claim 15 , wherein
the lower electrode includes:
a reflective layer formed of a metal material; and
a coating layer which is formed of a transparent conductive oxide different from the conductive oxide layer and covers an upper surface of the reflective layer.
17 . The display device of claim 15 , wherein
the end portion of the lower electrode overlaps the lower portion.
18 . The display device of claim 15 , wherein
the upper portion includes a first top layer provided on the lower portion, and a second top layer provided on the first top layer,
the first top layer and the second top layer are formed of different materials, and
an end portion of the first top layer protrudes from an end portion of the second top layer.
19 . The display device of claim 15 , wherein
the organic layer is spaced apart from the lower portion.
20 . The display device of claim 15 , wherein
an end portion of the conductive oxide layer overlaps the lower portion, and
the other end portion of the conductive oxide layer does not overlap the lower portion.