US 12,262,575 B2
Display substrate and display device
Haiyan Sun, Beijing (CN); Xiaojin Zhang, Beijing (CN); Dan Wang, Beijing (CN); and Changho Lee, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/312,030
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Aug. 7, 2020, PCT No. PCT/CN2020/107925
§ 371(c)(1), (2) Date Jun. 9, 2021,
PCT Pub. No. WO2022/027630, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2022/0336765 A1, Oct. 20, 2022
Int. Cl. H10K 50/12 (2023.01); H10K 85/40 (2023.01); H10K 85/60 (2023.01)
CPC H10K 50/12 (2023.02) [H10K 85/40 (2023.02); H10K 85/622 (2023.02); H10K 85/625 (2023.02); H10K 85/633 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A display substrate, comprising:
a base substrate, and an anode layer, a light-emitting layer, an electron diffusion layer, a hole block layer, and a cathode layer which are sequentially stacked along a direction away from the base substrate,
wherein a material of the electron diffusion layer comprises a first luminescent material, and a transport speed of holes generated by the anode layer in the electron diffusion layer is less than a transport speed of the holes in the light-emitting layer; and
wherein the material of the electron diffusion layer further comprises a first host material and a first sensitizing material; and
a material of the light-emitting layer comprises a second host material, a second sensitizing material, and a second luminescent material, and
wherein a doping proportion of the first sensitizing material is less than that of the second sensitizing material.