US 12,075,643 B2
Light-emitting element and light-emitting device
Noboru Iwata, Sakai (JP); and Kenji Kimoto, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/433,446
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Feb. 26, 2019, PCT No. PCT/JP2019/007397
§ 371(c)(1), (2) Date Aug. 24, 2021,
PCT Pub. No. WO2020/174595, PCT Pub. Date Sep. 3, 2020.
Prior Publication US 2022/0149309 A1, May 12, 2022
Int. Cl. H01L 21/00 (2006.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01)
CPC H10K 50/15 (2023.02) [H10K 50/16 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light-emitting element comprising:
an anode;
a hole transport layer;
a light-emitting layer containing quantum dots;
an electron transport layer; and
a cathode, arranged in this order,
the light-emitting element further comprising a first layer between the light-emitting layer and the hole transport layer and/or a second layer between the light-emitting layer and the electron transport layer, wherein
the first and second layers contain, as an element:
a transition metal element that is a component of an oxide semiconductor;
at least one element selected from Al, Mg, and Si; and
oxygen.