US 12,193,248 B2
Organic light emitting device and display apparatus
Lei Chen, Beijing (CN); Lixia Qiu, Beijing (CN); and Kun Ma, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/439,406
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Dec. 11, 2020, PCT No. PCT/CN2020/135537
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2022/120773, PCT Pub. Date Jun. 16, 2022.
Prior Publication US 2022/0376198 A1, Nov. 24, 2022
Int. Cl. H01L 51/50 (2006.01); H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 50/18 (2023.01); H10K 85/60 (2023.01); H10K 101/40 (2023.01)
CPC H10K 50/11 (2023.02) [H10K 50/12 (2023.02); H10K 50/18 (2023.02); H10K 85/615 (2023.02); H10K 85/624 (2023.02); H10K 85/633 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 2101/40 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An organic light emitting device, comprising an anode, a cathode, and an emitting layer disposed between the anode and the cathode, an electron block layer being disposed between the emitting layer and the anode, and a hole block layer being disposed between the emitting layer and the cathode; wherein the emitting layer comprises a host material and a dopant material doped in the host material; the host material comprises a first host material and a second host material, and the first host material, the second host material, the electron block layer, and the hole block layer satisfy:
|HOMO1-host-HOMOEBL|≤0.2 eV,|LUMOHBL-LUMO2-host|≤0.2 eV,
wherein HOMO1-host is a highest occupied molecular orbital HOMO energy level of the first host material; HOMOEBL is a HOMO energy level of the electron block layer; LUMO2-host is a lowest unoccupied molecular orbital LUMO energy level of the second host material, and LUMOHBL is a LUMO energy level of the hole block layer.