US 12,284,860 B2
Light-emitting element having a p-type hole transport layer with n-type nanoparticles dispersed therein and a display device thereof
Shinichi Handa, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/642,454
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Sep. 19, 2019, PCT No. PCT/JP2019/036735
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/053787, PCT Pub. Date Mar. 25, 2021.
Prior Publication US 2022/0310962 A1, Sep. 29, 2022
Int. Cl. H01L 29/08 (2006.01); H10K 50/15 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/156 (2023.02) [H10K 2102/00 (2023.02); H10K 2102/331 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light-emitting element comprising:
an anode;
a cathode;
a light-emitting layer between the anode and the cathode; and
a hole transport layer between the anode and the light-emitting layer, the hole transport layer comprising:
a p-type semiconductor layer comprising a p-type semiconductor material provided in a form of a layer; and
an n-type semiconductor material dispersed in the p-type semiconductor layer,
wherein the n-type semiconductor material comprises nanoparticles containing a first metal oxide, and
the nanoparticles are confined within the hole transport layer.