US 12,433,067 B2
Light-emitting element and light-emitting device
Yoshihiro Ueta, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/790,921
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Jan. 15, 2020, PCT No. PCT/JP2020/001122
§ 371(c)(1), (2) Date Jul. 5, 2022,
PCT Pub. No. WO2021/144892, PCT Pub. Date Jul. 22, 2021.
Prior Publication US 2023/0035091 A1, Feb. 2, 2023
Int. Cl. H10K 50/155 (2023.01); H10H 20/812 (2025.01); H10K 50/15 (2023.01); H10K 50/115 (2023.01); H10K 102/00 (2023.01)
CPC H10H 20/812 (2025.01) [H10K 50/155 (2023.02); H10K 50/156 (2023.02); H10K 50/115 (2023.02); H10K 2102/00 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light-emitting element comprising:
an anode;
a cathode;
a light-emitting layer disposed between the anode and the cathode and containing a quantum dot; and
a hole transport layer disposed between the light-emitting layer and the anode,
wherein the hole transport layer includes
an n+-type semiconductor layer, and
a p+-type semiconductor layer adjacent to the n+-type semiconductor layer and disposed closer to the light-emitting layer than the n+-type semiconductor layer.