Light-emitting device, method for manufacturing same, and display device comprising same
A light emitting device may include a first electrode disposed on a substrate, and a second electrode spaced apart from the first electrode, the first electrode and the second electrode being disposed on a same layer; an insulating pattern disposed between the first electrode and the second electrode, and overlapping a portion of the first electrode and a portion of the second electrode; and at least one light emitting element disposed on the insulating pattern, and including a first end and a second end in a longitudinal direction of the at least one light emitting element; a first bank disposed on the first electrode, and a second bank disposed on the second electrode; a first reflective electrode disposed on the first bank and electrically connected with the first electrode; and a second reflective electrode disposed on the second bank and electrically connected with the second electrode.
1. A light emitting device comprising:
a first electrode disposed on a substrate;
a second electrode spaced apart from the first electrode, the first electrode and the second electrode being disposed on a same layer;
an insulating pattern disposed between the first electrode and the second electrode and overlapping a portion of the first electrode and a portion of the second electrode in a plan view;
at least one light emitting element disposed on the insulating pattern, and including a first end and a second end in a longitudinal direction of the at least one light emitting element;
a first bank disposed on the first electrode, and a second bank disposed on the second electrode;
a first reflective electrode disposed on the first bank and electrically connected with the first electrode; and
a second reflective electrode disposed on the second bank and electrically connected with the second electrode, wherein
in a plan view, the insulating pattern has a width greater than a length of the at least one light emitting element.
2. The light emitting device according to claim 1 , wherein, in a plan view, the insulating pattern is disposed between the first bank and the second bank which are spaced apart from each other.
3. The light emitting device according to claim 2 , wherein a height of each of the first bank and the second bank is equal to or greater than the length of the at least one light emitting element.
4. The light emitting device according to claim 2 , wherein the width of the insulating pattern is less than a distance between the first reflective electrode and the second reflective electrode and greater than the distance between the first electrode and the second electrode.
5. The light emitting device according to claim 2 , wherein the first reflective electrode and the second reflective electrode are disposed on a same layer and spaced apart from each other.
6. The light emitting device according to claim 2 , further comprising:
a first contact electrode disposed on the first reflective electrode, the first contact electrode electrically connecting the first end of the at least one light emitting element with the first reflective electrode; and
a second contact electrode disposed on the second reflective electrode, the second contact electrode electrically connecting the second end of the at least one light emitting element with the second reflective electrode.
7. The light emitting device according to claim 2 , wherein the at least one light emitting element comprises:
a first semiconductor layer doped with a first conductive dopant;
a second semiconductor layer doped with a second conductive dopant; and
an active layer disposed between the first semiconductor layer and the second semiconductor layer.
8. The light emitting device according to claim 7 , wherein the at least one light emitting element includes a light emitting diode having a shape of a cylinder or polyprism and having a micro-scale or nano-scale size.
9. The light emitting device according to claim 1 , wherein
the first end of each of the at least one light emitting element is spaced apart from the substrate by a first distance,
the second end of each of the at least one light emitting element is spaced apart from the substrate by a second distance, and
the first distance and the second distance are equal.
10. The light emitting device according to claim 1 , further comprising:
a first contact electrode disposed on the first reflective electrode, the first contact electrode electrically connecting the first end of the at least one light emitting element with the first reflective electrode; and
a second contact electrode disposed on the second reflective electrode, the second contact electrode electrically connecting the second end of the at least one light emitting element with the second reflective electrode.
11. The light emitting device according to claim 1 , wherein
the first electrode is disposed between the first bank and the substrate, and
the second electrode is disposed between the second bank and the substrate.
12. The light emitting device according to claim 10 , wherein
the first bank is disposed between the first electrode and each of the first reflective electrode and the first contact electrode, and
the second bank is disposed between the second electrode and each of the second reflective electrode and the second contact electrode.
13. The light emitting device according to claim 1 , wherein
the insulating pattern has a bar shape in a plan view, and
the insulating pattern has a flat upper surface that is parallel to an upper surface of the substrate.
14. The light emitting device according to claim 7 , wherein
the at least one light emitting element further includes an insulating film enclosing at least a portion of an outer circumferential surface of the first semiconductor layer, the active layer and the second semiconductor layer, the insulating film being selected from SiO 2 , Si 3 N 4 , Al 2 O 3 , and TiO 2 , and
the insulating pattern being an organic insulating layer comprised of an organic material.