| abstract |
The present invention provides a light emitting device with high external quantum efficiency. In addition, a light emitting device having a low driving voltage is provided. A combination in which a light emitting layer comprising a phosphorescent compound, a first organic compound, and a second organic compound is disposed between a pair of electrodes, wherein the first organic compound and the second organic compound form an exciplex (exciplex), wherein The emission spectrum of the complex overlaps with the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound, and the peak wavelength of the emission spectrum of the exciplex is the peak of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound Provided is a light emitting device having a wavelength greater than or equal to a wavelength. |