US 12,283,605 B2
Light-emitting element, method of fabricating the light-emitting element, and display device
Moon Jung An, Hwaseong-si (KR); Hye Lim Kang, Hwaseong-si (KR); Min Young Kim, Cheonan-si (KR); and Dong Eon Lee, Hwaseong-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Jul. 22, 2021, as Appl. No. 17/382,864.
Claims priority of application No. 10-2020-0092312 (KR), filed on Jul. 24, 2020.
Prior Publication US 2022/0028925 A1, Jan. 27, 2022
Int. Cl. H10K 59/70 (2023.01); H01L 27/15 (2006.01); H01L 33/00 (2010.01); H01L 33/24 (2010.01); H01L 33/38 (2010.01); H01L 33/44 (2010.01)
CPC H01L 27/156 (2013.01) [H01L 33/0093 (2020.05); H01L 33/24 (2013.01); H01L 33/38 (2013.01); H01L 33/44 (2013.01); H01L 2933/0016 (2013.01); H01L 2933/0025 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A micro-column light-emitting element comprising:
a first semiconductor layer doped with an n-type dopant;
a second semiconductor layer doped with a p-type dopant;
a light-emitting layer disposed between the first semiconductor layer and the second semiconductor layer;
an electrode layer disposed on the second semiconductor layer;
an insulating structure disposed on the electrode layer and having a maximum diameter smaller than a diameter of the electrode layer; and
an insulating film that surrounds side surfaces of the first semiconductor layer, the light-emitting layer, and the second semiconductor layer.
 
9. A display device comprising:
a first substrate;
a first electrode disposed on the first substrate;
a second electrode spaced apart from the first electrode;
a first insulating layer disposed on the first substrate and covering the first electrode and the second electrode;
a plurality of micro-column light-emitting elements disposed on the first insulating layer and including end portions disposed on the first electrode and the second electrode;
first contact electrode that electrically contacts the first electrode and first end portions of the plurality of micro-column light-emitting elements; and
a second contact electrode that electrically contacts the second electrode and second end portions of the plurality of micro-column light-emitting elements,
wherein each of the plurality of micro-column light-emitting elements includes:
a first semiconductor layer doped with an n-type dopant;
a second semiconductor layer doped with a p-type dopant;
a light-emitting layer disposed between the first and second semiconductor layers;
an electrode layer disposed on the second semiconductor layer;
an insulating structure disposed on the electrode layer and having a maximum diameter smaller than a diameter of the electrode layer; and
an insulating film that surrounds side surfaces of the first semiconductor layer, the light-emitting layer, and the second semiconductor layer.