US 12,238,951 B2
Organic electroluminescent device and array substrate
Qingyu Huang, Beijing (CN); Fudong Chen, Beijing (CN); Zhiqiang Jiao, Beijing (CN); and Guangcai Yuan, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/629,389
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Apr. 9, 2021, PCT No. PCT/CN2021/086284
§ 371(c)(1), (2) Date Jan. 23, 2022,
PCT Pub. No. WO2021/238448, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 202010449363.9 (CN), filed on May 25, 2020.
Prior Publication US 2022/0278293 A1, Sep. 1, 2022
Int. Cl. H01L 51/50 (2006.01); H01L 27/32 (2006.01); H10K 50/12 (2023.01); H10K 50/13 (2023.01); H10K 50/155 (2023.01); H10K 50/165 (2023.01); H10K 59/32 (2023.01)
CPC H10K 50/155 (2023.02) [H10K 50/12 (2023.02); H10K 50/13 (2023.02); H10K 50/165 (2023.02); H10K 59/32 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An organic electroluminescent device, comprising:
an anode, a first organic light emitting layer, an exciton control layer, a second organic light emitting layer, and a cathode that are successively stacked, wherein:
the first organic light emitting layer comprises a hole transport type host material and a first doping material;
the exciton control layer is disposed on a surface of the first organic light emitting layer, and comprises a first hole transport material and a first electron transport material; the second organic light emitting layer is disposed on a surface of the exciton control layer, and comprises an electron transport type host material and a second doping material;
the first doping material is a fluorescent doping material, the second doping material is a phosphorescent doping material, the first hole transport material in the exciton control layer is less than the first electron transport material in the exciton control layer, and a migration rate of holes in the exciton control layer is less than a migration rate of electrons in the exciton control layer; or
the second doping material is the fluorescent doping material, the first doping material is the phosphorescent doping material, the first hole transport material in the exciton control layer is more than the first electron transport material in the exciton control layer, and a migration rate of holes in the exciton control layer is greater than a migration rate of electrons in the exciton control layer.