Invention Application
US20160126463A1 Benzo[a] Anthracene Compound, Light-Emitting Element, Display Device, Electronic Device, and Lighting Device 审中-公开
苯并[a]蒽化合物,发光元件,显示装置,电子装置和照明装置

Benzo[a] Anthracene Compound, Light-Emitting Element, Display Device, Electronic Device, and Lighting Device
Abstract:
Provided is a light-emitting element with high emission efficiency including a fluorescent material as a light-emitting substance. In a light-emitting element including a pair of electrodes and an EL layer between the pair of electrodes, a delayed fluorescence component due to triplet-triplet annihilation accounts for 20% or more of light emitted from the EL layer, and the light has at least one emission spectrum peak in the blue wavelength range. The EL layer includes an organic compound in which an energy difference between the lowest singlet excited energy level and the lowest triplet excited energy level is 0.5 eV or more. The EL layer includes a benzo[a]anthracene compound.
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