| abstract |
The present invention relates to a compound and application thereof, the compound has the structure shown in formula I, the compound has the property of thermal activation retardation, adopts a single cyano structure, so that the emission spectrum is blue-shifted, and at the same time, through the cyano-substituted benzene ring The introduction of Dw and Cz groups with specific structures, especially the di-ortho substitution structure of d 1 and d 2 in C z , finally makes the molecular structure more distorted, reduces the HOMO-LUMO orbital overlap of the molecule, and enhances the The properties of TADF, when applied to OLED devices, can make the device have higher luminous efficiency, lower driving voltage and longer service life, especially when used as a dye for the light-emitting layer, the effect is better. |