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

Claim 0:
1. 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 the longest wavelength side of an absorption spectrum of the iridium complex, and
wherein an emission peak wavelength of the exciplex is longer than or equal to the peak wavelength of the absorption band on a longest wavelength side of the absorption spectrum of the iridium complex.