US 12,396,317 B2
Light-emitting element and method of manufacturing light-emitting element
Hirofumi Yoshikawa, Sakai (JP); Yoshihiro Ueta, Sakai (JP); Takahiro Doe, Sakai (JP); Masaki Yamamoto, Sakai (JP); and Daisuke Toyoshima, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 18/015,035
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Jul. 22, 2020, PCT No. PCT/JP2020/028412
§ 371(c)(1), (2) Date Jan. 6, 2023,
PCT Pub. No. WO2022/018849, PCT Pub. Date Jan. 27, 2022.
Prior Publication US 2023/0276649 A1, Aug. 31, 2023
Int. Cl. H10K 50/115 (2023.01); H10K 50/16 (2023.01); H10K 71/12 (2023.01); H10K 59/00 (2023.01)
CPC H10K 50/115 (2023.02) [H10K 50/16 (2023.02); H10K 71/125 (2023.02); H10K 59/00 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light-emitting element comprising:
a first electrode;
a second electrode disposed opposite the first electrode;
a light-emitting layer disposed between the first electrode and the second electrode and containing quantum dots; and
a carrier transport layer disposed between the first electrode and a surface of the light-emitting layer on a second electrode side, including a plurality of protrusions extending toward the second electrode side, and containing a first carrier transport material, wherein
at least parts of the plurality of protrusions of the carrier transport layer and at least parts of a plurality of gaps between the plurality of protrusions are covered by the quantum dots, wherein
the carrier transport layer includes: a first carrier transport layer including a plurality of openings and containing the first carrier transport material; and a rod-like, second carrier transport material forming the plurality of protrusions in the plurality of openings.