Patent ID: 11871592
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 7:
8. A light-emitting element comprising:
a pair of electrodes,
a light-emitting layer between the pair of electrodes,
wherein the light-emitting layer comprises an iridium complex, a first organic compound, and a second organic compound,
wherein the first organic compound is a heteroaromatic compound,
wherein the second organic compound is an aromatic amine compound or a carbazole compound,
wherein the first organic compound and the second organic compound form an exciplex,
wherein an emission spectrum of the exciplex overlaps with an absorption band on a longest wavelength side of an absorption spectrum of the iridium complex, and
wherein a difference between an emission peak wavelength of the exciplex and an emission peak wavelength of the iridium complex is 30 nm or less.