| abstract |
The invention discloses a fluorene-based phosphorescent compound, a preparation method thereof, and an organic electroluminescent device, belonging to the technical field of chemistry and organic light-emitting materials. The general structural formula of the phosphorescent compound is: In the formula, L 1 and L 2 are each independently at least one of a connecting bond, a substituted or unsubstituted C6-C30 aryl group, and a substituted or unsubstituted C6-C30 heteroaryl group. The organic electroluminescent device containing the phosphorescent compound has lower driving voltage, higher lifetime and higher efficiency. The phosphorescent compound provided by the present invention can adjust the wavelength of the compound by selecting specific heterocyclic ligand binding, so that after it is used in an organic electroluminescent device, the luminous efficiency and service life of the device can be improved. |