Light emitting device and manufacturing method of the light emitting device
A light-emitting device includes: a substrate; a unit light-emitting area disposed on the substrate; first and second electrodes disposed in the unit light-emitting area to be separated from each other; a plurality of rod-shaped LEDs disposed between the first and second electrodes; a reflective contact electrode disposed on opposite ends of the rod-shaped LEDs to electrically connect the rod-shaped LEDs to the first and second electrodes; and a light-transmitting structure disposed between the first and second electrodes and extending to cross the rod-shaped LEDs.
1. A light-emitting device, comprising:
a base layer;
a light-emitting diode (LED) disposed on the base layer, the LED having a first end and a second end opposite to the first end;
a first electrode and a second electrode disposed on the base layer, the first and second electrodes respectively being in contact with the first and second ends of the LED; and
a light-transmitting structure disposed on the LED, the light-transmitting structure comprising scatterers.
2. The light-emitting device of claim 1 , wherein the scatterers include at least one of TiO2 and SiO2.
3. The light-emitting device of claim 2 , wherein the light-transmitting structure further comprises a silicone resin within which the scatterers are distributed.
4. The light-emitting device of claim 1 , wherein a light emitted is from the LED through the light-transmitting structure.
5. The light-emitting device of claim 1 , further comprising pixels provided on the base layer, each of the pixels including a light-emitting area,
wherein the LED and the light-transmitting structure are provided in the light-emitting area of each of the pixels.
6. The light-emitting device of claim 1 , wherein
the light-transmitting structure has an inclined side surface, and
a width of the inclined side surface gradually decreases toward the base layer.
7. The light-emitting device of claim 1 , wherein
the light-transmitting structure comprises a top surface,
the top surface protrudes above the LED, and
the top surface is uneven.
8. The light-emitting device of claim 1 , wherein
the light-transmitting structure has a width that gradually decreases from the base layer to a direction away from the base layer, and
the light-transmitting structure further comprises a curved side surface.
9. The light-emitting device of claim 1 , wherein the first and second electrodes are disposed on a same layer.
10. The light-emitting device of claim 1 , wherein the first and second electrodes are disposed on the LED.
11. The light-emitting device of claim 9 , wherein each of the first and second electrodes comprises at least one metal selected among Ti, Cu, Mo, Al, Au, Cr, TiN, Ag, Pt, Pd, Ni, Sn, Co, Rh, Ir, Fe, Ru, Os, Mn, W, Nb, Ta, Bi, Sb, and Pb, or at least one metal oxide selected among ITO, IZO, AZO, ITZO, ZnO, and SnO2.
12. The light-emitting device of claim 1 , further comprising:
a third electrode partially overlapping the first electrode on a plan view and electrically connected to the first electrode; and
a fourth electrode partially overlapping the second electrode on the plan view, wherein
the first end of the LED is disposed between the first electrode and the third electrode, and
the second end of the LED is disposed between the second electrode and the fourth electrode.
13. The light-emitting device of claim 1 , further comprising an insulating film covering at least a part of an outer circumferential surface of the LED.
14. The light-emitting device of claim 1 , wherein the LED comprises:
a first conductive semiconductor layer;
an active layer;
a second conductive semiconductor layer; and
an electrode layer sequentially arranged in a direction parallel to the base layer.
15. The light-emitting device of claim 14 , further comprising:
a first contact electrode and a second contact electrode disposed at opposite ends of the LED, wherein
the first conductive semiconductor layer contacts the first contact electrode, and
the electrode layer contacts the second contact electrode.
16. The light-emitting device of claim 1 , wherein the LED is a rod-shaped LED.
17. The light-emitting device of claim 16 , wherein the LED is disposed parallel to the base layer.