Light emitting element and display device including the same
A display device includes a light emitting element disposed on a substrate and including a first end portion and a second end portion. The first electrode is electrically connected to the first end portion of the light emitting element. The second electrode is electrically connected to the second end portion of the light emitting element. A first semiconductor layer, a light emitting layer, a second semiconductor layer, and an electrode layer of the light emitting element are sequentially disposed along a longitudinal direction from the second end portion to the first end portion. An insulating film of the light emitting element covers side surfaces of the first semiconductor layer, the light emitting layer, the second semiconductor layer, and the electrode layer, and extends in parallel to the longitudinal direction. A shielding layer is disposed inside the insulating film.
1 . A light emitting element comprising:
a first semiconductor layer;
a light emitting layer disposed on the first semiconductor layer;
a second semiconductor layer disposed on the light emitting layer;
an electrode layer disposed on the second semiconductor layer;
an insulating film covering side surfaces of the first semiconductor layer, the light emitting layer, the second semiconductor layer, and the electrode layer; and
a shielding layer disposed inside the insulating film, wherein
a light transmittance of the shielding layer is equal to or greater than about 70%, and
light emitted from the light emitting layer transmits through the shielding layer.
2 . The light emitting element according to claim 1 , wherein the shielding layer is spaced apart from the first semiconductor layer, the light emitting layer, the second semiconductor layer, and the electrode layer.
3 . The light emitting element according to claim 1 , wherein the shielding layer surrounds the side surface of the light emitting layer.
4 . The light emitting element according to claim 3 , wherein
the shielding layer entirely surrounds the side surfaces of the light emitting layer and the second semiconductor layer, and partially surrounds the side surface of the first semiconductor layer.
5 . The light emitting element according to claim 4 , wherein the shielding layer comprises:
a first shielding layer surrounding the side surfaces of the second semiconductor layer and the light emitting layer; and
a second shielding layer partially surrounding the side surface of the first semiconductor layer and spaced apart from the first shielding layer.
6 . The light emitting element according to claim 5 , wherein
the second shielding layer extends to an end portion of the insulating film adjacent to a lower surface of the first semiconductor layer and is exposed outside the light emitting element, and
the first shielding layer extends to another end portion of the insulating film adjacent to an upper surface of the electrode layer and is exposed outside the light emitting element.
7 . The light emitting element according to claim 1 , wherein
the shielding layer includes a metal, and
a thickness of the shielding layer is equal to or smaller than about 5 nm.
8 . A display device comprising:
a light emitting element disposed on a substrate and including a first end portion and a second end portion arranged in a direction parallel to an upper surface of the substrate;
a first electrode electrically connected to the first end portion of the light emitting element; and
a second electrode electrically connected to the second end portion of the light emitting element,
wherein the light emitting element comprises:
a first semiconductor layer, a light emitting layer, a second semiconductor layer, and an electrode layer sequentially disposed along a longitudinal direction from the second end portion to the first end portion;
an insulating film covering side surfaces of the first semiconductor layer, the light emitting layer, the second semiconductor layer, and the electrode layer, the insulating film extending in parallel to the longitudinal direction; and
a shielding layer disposed inside the insulating film.
9 . The display device according to claim 8 , wherein the shielding layer is spaced apart from the first semiconductor layer, the light emitting layer, the second semiconductor layer, the electrode layer, the first electrode, and the second electrode.
10 . The display device according to claim 8 , wherein
the shielding layer surrounds the side surface of the light emitting layer, and
the shielding layer overlaps the first electrode in a plan view.
11 . The display device according to claim 10 , wherein
a light transmittance of the shielding layer is equal to or greater than about 70%, and
light emitted from the light emitting layer transmits through the shielding layer.
12 . The display device according to claim 11 , wherein
the shielding layer includes a metal, and
a thickness of the shielding layer is equal to or smaller than about 5 nm.
13 . The display device according to claim 10 , wherein
the shielding layer entirely surrounds the side surfaces of the light emitting layer and the second semiconductor layer, and partially surrounds the side surface of the first semiconductor layer,
a light reflectance of the shielding layer is equal to or greater than about 90%, and
light emitted from the light emitting layer is reflected by the shielding layer and transmits outside the light emitting element through the first end portion and the second end portion.
14 . The display device according to claim 13 , wherein the shielding layer comprises:
a first shielding layer surrounding the side surfaces of the second semiconductor layer and the light emitting layer; and
a second shielding layer partially surrounding the side surface of the first semiconductor layer and spaced apart from the first shielding layer.
15 . The display device according to claim 14 , wherein
the first shielding layer extends to the first end portion and is electrically connected to the first electrode, and
the second shielding layer extends to the second end portion and is electrically connected to the second electrode.
16 . A display device comprising:
a light emitting element disposed on a first insulating layer and including a first end portion and a second end portion;
a second insulating layer disposed on the light emitting element and exposing the first end portion and the second end portion of the light emitting element;
a first electrode disposed on the first end portion of the light emitting element;
a second electrode disposed on the second end portion of the light emitting element; and
a shielding layer disposed between the second insulating layer and the light emitting element and electrically separated from the first electrode and the second electrode.
17 . The display device according to claim 16 , wherein the shielding layer is in a floating state.
18 . The display device according to claim 16 , wherein
a light transmittance of the shielding layer is equal to or greater than about 70%, and
light emitted from the light emitting element transmits through the shielding layer.
19 . The display device according to claim 16 , further comprising:
a third insulating layer disposed between the shielding layer and the second insulating layer and covering the shielding layer.