US 12,389,738 B2
OLED device, display apparatus and manufacturing method therefor
Lei Chen, Beijing (CN); and Congcong Jia, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/615,558
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jan. 9, 2021, PCT No. PCT/CN2021/070986
§ 371(c)(1), (2) Date Nov. 30, 2021,
PCT Pub. No. WO2021/139800, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 202010022585.2 (CN), filed on Jan. 9, 2020.
Prior Publication US 2022/0238831 A1, Jul. 28, 2022
Int. Cl. H01L 51/50 (2006.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/18 (2023.01); H10K 71/00 (2023.01); H10K 59/12 (2023.01); H10K 101/40 (2023.01)
CPC H10K 50/11 (2023.02) [H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); H10K 50/18 (2023.02); H10K 50/181 (2023.02); H10K 71/00 (2023.02); H10K 59/12 (2023.02); H10K 2101/40 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An organic light-emitting diode (OLED) device, comprising:
a first electrode;
a light-emitting layer, a material of the light-emitting layer including a host material and a trap material, a lowest unoccupied molecular orbital energy level of the trap material being lower than a lowest unoccupied molecular orbital energy level of the host material, and a highest occupied molecular orbital energy level of the trap material being not higher than a highest occupied molecular orbital energy level of the host material;
an electron blocking layer, the lowest unoccupied molecular orbital energy level of the trap material being lower than a lowest unoccupied molecular orbital energy level of a material of the electron blocking layer; and
a second electrode; wherein
the first electrode, the light-emitting layer, the electron blocking layer and the second electrode are stacked in sequence.
 
15. A manufacturing method for an organic light-emitting diode (OLED) device, comprising:
forming a first electrode, a light-emitting layer, an electron blocking layer and a second electrode; wherein
the first electrode, the light-emitting layer, the electron blocking layer and the second electrode are stacked in sequence, and a material of the light-emitting layer includes a host material and a trap material;
a lowest unoccupied molecular orbital energy level of the trap material is lower than a lowest unoccupied molecular orbital energy level of the host material, a highest occupied molecular orbital energy level of the trap material is not higher than a highest occupied molecular orbital energy level of the host material, and the lowest unoccupied molecular orbital energy level of the trap material is lower than a lowest unoccupied molecular orbital energy level of a material of the electron blocking layer.