US 12,108,617 B2
Light-emitting element, light-emitting device, and method for manufacturing light-emitting element
Daisuke Honda, Sakai (JP); and Yoshihiro Ueta, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/640,127
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Sep. 4, 2019, PCT No. PCT/JP2019/034863
§ 371(c)(1), (2) Date Mar. 3, 2022,
PCT Pub. No. WO2021/044558, PCT Pub. Date Mar. 11, 2021.
Prior Publication US 2022/0310960 A1, Sep. 29, 2022
Int. Cl. H10K 50/125 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 71/00 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/125 (2023.02) [H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 71/00 (2023.02); H10K 2102/331 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light-emitting element comprising:
a cathode; an anode; a light-emitting layer provided between the cathode and the anode and containing quantum dots; an electron-transport layer provided between the light-emitting layer and the cathode; and a hole-transport layer provided between the light-emitting layer and the anode,
the light-emitting layer containing halogen ligands and organic ligands coordinated to each of the quantum dots,
the light-emitting layer including: a first region toward the hole-transport layer; and a second region toward the electron-transport layer, and
in the first region, a concentration of the halogen ligands being higher than a concentration of the organic ligands, and, in the second region, the concentration of the halogen ligands being lower than the concentration of the organic ligands.