| abstract |
The invention discloses an organic material, a preparation method thereof and an organic electroluminescence device, belonging to the fields of chemical synthesis and optoelectronic materials, and its general structural formula is: In the formula, Ar 1 , Ar 2 , Ar 3 and Ar 4 are each independently one of hydrogen, deuterium, halogen, cyano, aryl and heteroaryl; Ar 3 and Ar 4 are independently and on the ring where they are located. Other substituents form C6-C14 aromatic rings or C4-C18 heteroaromatic rings with each other. In the embodiment of the present invention, by selecting a specific combination of heterocycles, the obtained organic material can improve the hole transport efficiency after being used in an organic electroluminescent device, block excitons well, make the energy level match, and make the device The holes and electrons are balanced, so that the startup voltage of the device can be reduced and the luminous efficiency and lifespan of the device can be improved. |