US 12,114,521 B2
Light-emitting element and display device
Takayuki Naka, Osaka (JP); Yoshihiro Ueta, Osaka (JP); and Noboru Iwata, Osaka (JP)
Assigned to SHARP KABUSHIKI KAISHA, Osaka (JP)
Appl. No. 17/434,348
Filed by SHARP KABUSHIKI KAISHA, Osaka (JP)
PCT Filed Mar. 4, 2019, PCT No. PCT/JP2019/008469
§ 371(c)(1), (2) Date Aug. 26, 2021,
PCT Pub. No. WO2020/178963, PCT Pub. Date Sep. 10, 2020.
Prior Publication US 2022/0158115 A1, May 19, 2022
Int. Cl. H10K 50/17 (2023.01); H10K 50/11 (2023.01); H10K 59/35 (2023.01); H10K 85/10 (2023.01); H10K 50/115 (2023.01); H10K 50/16 (2023.01); H10K 59/12 (2023.01); H10K 101/40 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/17 (2023.02) [H10K 50/11 (2023.02); H10K 59/35 (2023.02); H10K 85/115 (2023.02); H10K 85/141 (2023.02); H10K 85/146 (2023.02); H10K 50/115 (2023.02); H10K 50/16 (2023.02); H10K 59/12 (2023.02); H10K 2101/40 (2023.02); H10K 2102/00 (2023.02); H10K 2102/331 (2023.02); H10K 2102/351 (2023.02)] 25 Claims
OG exemplary drawing
 
1. A light-emitting element provided with
an anode,
a light-emitting layer including quantum dots, and
a cathode,
the light-emitting element comprising:
an electron transport layer provided between the cathode and the light-emitting layer; and
a hole tunneling insulating layer provided between the anode and the light-emitting layer and in contact with the anode and the light-emitting layer, wherein
the hole tunneling insulating layer includes a plurality of layers composed of different materials.