Patent ID: 11930651
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 12:
13. The organic electroluminescence element according to claim 9, further comprising an electron transport layer and a hole blocking layer disposed between the cathode and the organic light emitting layer, the electron transport layer disposed close to the cathode, the hole blocking layer disposed close to the organic light-emitting layer, and the hole blocking layer comprising a hole blocking material; wherein
a difference between an LUMO energy level of the hole blocking material and the LUMO energy level of the host material is less than 0.2 eV; or
a triplet energy level of the hole blocking material is greater than a triplet energy level of the host material, the triplet energy level of the hole blocking material is greater than a triplet energy level of the TADF sensitizer, and the triplet energy level of the blocking material is greater than a triplet energy level of the fluorescent luminescent material.