Patent ID: 11910628
Assignee: MERCK PATENT GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 6:
7. The organic electroluminescent element according to claim 5, wherein the phosphorescent compound and the blue fluorescent compound satisfy at least one of the following expression (5) or expression (6):

HOMOBPM>HOMOBFM; and  expression (5)

LUMOBPM<LUMOBFM,  expression (6)

wherein HOMOBPM represents an energy level of highest occupied molecular orbital (HOMO) of the blue phosphorescent compound; HOMOBFM represents a HOMO energy level of the blue fluorescent compound;
LUMOBPM represents an energy level of lowest unoccupied molecular orbital (LUMO) of the blue phosphorescent compound; and LUMOBPM represents a LUMO energy level of the blue fluorescent compound.