Patent ID: 11069871

Abstract:
Provided is an organic white light emitting element (EL) including: a reflective electrode, a light extraction electrode, and an organic layer arranged therebetween, the organic layer including: a blue light emitting layer (BL); and a long-wavelength light emitting layer, the long-wavelength light emitting layer arranged between the BL and the reflective electrode, the BL provided at such a position as to satisfy Equation given below: z=φ×λ1/4πwhere z represents an optical distance between the reflective electrode and an interface of the BL on the reflective electrode side, φ represents a phase of light reflected by the reflective electrode in an emission wavelength region of the BL, and λ1 represents a wavelength in a visible light region, and the EL has a resonator structure defined between the reflective electrode and the light extraction electrode and has a maximum peak resonant wavelength in a blue light wavelength region.