Organic light-emitting diode comprising self-crystallizing material and organic light-emitting display device including the same
Disclosed are an organic light-emitting diode and an organic light-emitting display device including the same. The organic light-emitting diode includes: a first electrode; a second electrode disposed opposite to the first electrode; a light-emitting layer disposed between the first electrode and the second electrode; a hole transport region disposed between the first electrode and the light-emitting layer; and an electron transport region disposed between the light-emitting layer and the second electrode; the hole transport region including at least two layers, and one of the at least two layers is in contact with the first electrode and is a self-crystallizing material-containing layer.
1. An organic light-emitting diode comprising:
a first electrode;
a second electrode disposed opposite to the first electrode;
a light-emitting layer disposed between the first electrode and the second electrode;
a hole transport region disposed between the first electrode and the light-emitting layer; and
an electron transport region disposed between the light-emitting layer and the second electrode;
wherein the hole transport region comprises at least two layers, one of the at least two layers is in contact with the first electrode and is a self-crystallizing material-containing layer, and the first electrode comprises at least two layers including a silver (Ag)-based reflective layer.
2. The organic light-emitting diode of claim 1 , wherein the self-crystallizing material-containing layer comprises a self-crystallizing material having a glass transition temperature of 150° C. or lower.
3. The organic light-emitting diode of claim 1 , wherein the self-crystallizing material-containing layer comprises a plurality of circular or hemispheric nanocrystals having a cross-sectional diameter of 40 to 200 nm and a height of 40 to 200 nm.
4. The organic light-emitting diode of claim 1 , wherein the self-crystallizing material-containing layer comprises a plurality of embossed nanopatterns on at least one of a first surface thereof in contact with the first electrode and a second surface thereof opposite to the first surface.
5. The organic light-emitting diode of claim 1 , wherein the self-crystallizing material-containing layer has a single or multilayer structure comprising at least one p-type inorganic dopant.
6. The organic light-emitting diode of claim 5 , wherein a doping quantity of the p-type inorganic dopant ranges from 0.5 to 50 weight % based on a total weight of the corresponding self-crystallizing material-containing layer.
7. The organic light-emitting diode of claim 1 , wherein the hole transport region comprises at least two selected from a hole injection layer, a hole transport layer, and a buffer layer, and the self-crystallizing material-containing layer is a hole injection layer.
8. An organic light-emitting display device comprising:
a substrate; and
a plurality of red organic light-emitting diodes, green organic light-emitting diodes, and blue organic light-emitting diode disposed on the substrate;
wherein each of the plurality of red organic light-emitting diodes, green organic light-emitting diodes, and blue light-emitting diodes comprises:
a first electrode disposed on the substrate;
an organic layer disposed on the first electrode, and comprising a hole transport region, a light-emitting layer, and an electron transport region; and
a second electrode disposed on the organic layer;
wherein the hole transport region comprises at least two layers, and one of the at least two layers is in contact with the first electrode and is a self-crystallizing material-containing layer, and the first electrode comprises at least two layers including a silver (Ag)-based reflective layer.
9. The organic light-emitting display device of claim 8 , wherein the self-crystallizing material-containing layer comprises a self-crystallizing material having a glass transition temperature of 150° C. or lower.
10. The organic light-emitting display device of claim 8 , wherein the self-crystallizing material-containing layer comprises a plurality of circular or hemispheric nanocrystals having a cross-sectional diameter of 40 to 200 nm and a height of 40 to 200 nm.
11. The organic light-emitting display device of claim 8 , wherein the self-crystallizing material-containing layer comprises a plurality of embossed nanopatterns on at least one of a first surface thereof in contact with the first electrode and a second surface thereof opposite to the first surface.
12. The organic light-emitting display device of claim 8 , wherein the self-crystallizing material-containing layer has a single or multilayer structure comprising at least one p-type inorganic dopant.
13. The organic light-emitting display device of claim 12 , wherein a doping quantity of the p-type inorganic dopant ranges from 0.5 to 50 weight % based on a total weight of the corresponding self-crystallizing material-containing layer.
14. The organic light-emitting display device of claim 8 , wherein the hole transport region comprises at least two selected from a hole injection layer, a hole transport layer, and a buffer layer, and the self-crystallizing material-containing layer is a hole injection layer.
15. The organic light-emitting display device of claim 8 , wherein:
the organic layer of the red organic light-emitting diode has a thickness of 100 to 120 nm;
the organic layer of the green organic light-emitting diode has a thickness of 80 to 100 nm; and
the organic layer of the blue organic light-emitting diode has a thickness of 60 to 70 nm.
16. The organic light-emitting display device of claim 8 , wherein:
the organic layer of the red organic light-emitting diode has a thickness of 100 to 120 nm;
the organic layer of the green organic light-emitting diode has a thickness of 80 to 100 nm; and
the organic layer of the blue organic light-emitting diode has a thickness of 180 to 190 nm.
17. An organic light-emitting display device comprising:
a substrate; and
a plurality of red organic light-emitting diodes, green organic light-emitting diodes, and blue organic light-emitting diode disposed on the substrate;
wherein each of the plurality of red organic light-emitting diodes, green organic light-emitting diodes, and blue light-emitting diodes comprises:
a first electrode disposed on the substrate;
an organic layer disposed on the first electrode, and comprising a hole transport layer, a light-emitting layer, and an electron transport layer; and
a second electrode disposed on the organic layer;
wherein any one selected from the hole transport layer, the light-emitting layer, and the electron transport layer comprises a self-crystallizing material,
the first electrode comprises at least two layers including a silver (Ag)-based reflective layer, and
wherein:
the organic layer of the red organic light-emitting diode has a thickness of 100 to 120 nm;
the organic layer of the green organic light-emitting diode has a thickness of 80 to 100 nm; and
the organic layer of the blue organic light-emitting diode has a thickness of 60 to 70 nm, or the organic layer of the blue organic light-emitting diode has a thickness of 180 to 190 nm.
18. The organic light-emitting display device of claim 17 , wherein the any one selected from the electron transport layer, the light-emitting layer, and the electron transport layer including the self-crystallizing material has a plurality of embossed nanopatterns on at least one of a first surface of the corresponding layer and a second surface opposite to the first surface.