| abstract |
A thermally activated delayed fluorescent material containing double boron polycyclic aromatic hydrocarbons and an organic electroluminescent device using the same as a light-emitting layer belong to the technical field of organic electroluminescent materials. Its general structural formula is shown in (I),-L-is substituted or unsubstituted arylene, substituted or unsubstituted heteroarylene; R-is substituted or unsubstituted carbazolyl, substituted or unsubstituted benzobisindolyl, substituted or unsubstituted phenothiazinyl, substituted or unsubstituted phenoxazinyl, substituted or unsubstituted acridinyl; substituents are deuterium, halogen, nitrile, alkyl, One or more of a cycloalkyl group, an alkoxy group, an aryl group or a heterocyclic group. The organic electroluminescence device (OLED) prepared by using the compound of the present invention exhibits the characteristics of low turn-on and high efficiency, and is further used to prepare an organic electroluminescence display, an organic electroluminescence illumination light source or a decorative light source. |