US 12,219,788 B2
Light-emitting element and light-emitting device
Kenji Kimoto, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/634,390
Filed by SHARP KABUSHIKI KAISHA, Osaka (JP)
PCT Filed Aug. 13, 2019, PCT No. PCT/JP2019/031807
§ 371(c)(1), (2) Date Feb. 10, 2022,
PCT Pub. No. WO2021/029007, PCT Pub. Date Feb. 18, 2021.
Prior Publication US 2022/0328785 A1, Oct. 13, 2022
Int. Cl. H01L 51/50 (2006.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 101/40 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/156 (2023.02) [H10K 50/11 (2023.02); H10K 50/166 (2023.02); H10K 2101/40 (2023.02); H10K 2102/00 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A light-emitting element, comprising:
a first electrode serving as an anode;
a second electrode serving as a cathode;
a light-emitting layer provided between the first electrode and the second electrode;
a first oxide layer provided between the light-emitting layer and the first electrode; and
a second oxide layer provided between the first oxide layer and the light-emitting layer, and having contact with the first oxide layer, wherein
a density of oxygen atoms in the second oxide layer is lower than a density of oxygen atoms in the first oxide layer,
the first oxide layer is made of a semiconductor,
the first electrode, the second electrode, the light-emitting layer, the first oxide layer, and the second oxide layer are provided above a face of a substrate, and
either the first oxide layer or the second oxide layer whichever is positioned below the other one, is shaped as a plurality of islands.