US 11,737,332 B2
Display panel, display apparatus, light emitting element, and method of fabricating display panel
Qingyu Huang, Beijing (CN); Huajie Yan, Beijing (CN); Liangliang Kang, Beijing (CN); Fudong Chen, Beijing (CN); and Zhiqiang Jiao, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Apr. 14, 2022, as Appl. No. 17/721,218.
Application 17/721,218 is a continuation of application No. 16/769,563, granted, now 11,348,976, previously published as PCT/CN2019/099652, filed on Aug. 7, 2019.
Prior Publication US 2022/0246691 A1, Aug. 4, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 23/00 (2006.01); H10K 59/35 (2023.01); H10K 50/11 (2023.01); H10K 50/115 (2023.01); H10K 50/17 (2023.01); H10K 59/38 (2023.01); H10K 71/00 (2023.01); H10K 101/10 (2023.01); H10K 101/40 (2023.01)
CPC H10K 59/353 (2023.02) [H10K 50/11 (2023.02); H10K 50/115 (2023.02); H10K 50/171 (2023.02); H10K 59/38 (2023.02); H10K 71/00 (2023.02); H10K 2101/10 (2023.02); H10K 2101/40 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light emitting element, comprising:
a first light emitting layer and a second light emitting layer sequentially stacked; and
an intermediate layer between the first light emitting layer and the second light emitting layer, and being in direct contact with the first light emitting layer on one side and in direct contact with the second light emitting layer on another side;
wherein the first light emitting layer is configured to emit a first light of a first wavelength range;
the second light emitting layer is configured to emit a second light of a second wavelength range;
the first wavelength range comprises wavelength longer than the second wavelength range;
each of the intermediate layer, the first light emitting layer, and the second light emitting layer comprises a same host material;
the intermediate layer is a non-light emitting layer, and is an undoped layer absent of a dopant for emitting light; and
the light emitting element is configured to emit a composite light comprising the first light of the first wavelength range and the second light of the second wavelength range.