US 12,310,167 B2
Light-emitting element
Kenji Kimoto, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/634,379
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Aug. 13, 2019, PCT No. PCT/JP2019/031806
§ 371(c)(1), (2) Date Feb. 10, 2022,
PCT Pub. No. WO2021/029006, PCT Pub. Date Feb. 18, 2021.
Prior Publication US 2022/0285645 A1, Sep. 8, 2022
Int. Cl. H10K 50/18 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/18 (2023.02) [H10K 50/156 (2023.02); H10K 50/16 (2023.02); H10K 50/181 (2023.02); H10K 2102/00 (2023.02)] 6 Claims
OG exemplary drawing
 
1. A light-emitting element, comprising:
an anode, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode in this order; and
a first oxide layer and a second oxide layer that is in contact with the first oxide layer disposed in this order from a side closer to the anode between the hole transport layer and the light-emitting layer, or between the light-emitting layer and the electron transport layer,
wherein an oxygen atom density of the second oxide layer is different from an oxygen atom density of the first oxide layer, and
the first oxide layer, the second oxide layer, and the electron transport layer are disposed between the light-emitting layer and the cathode in this order from a side of the anode.