| abstract |
Disclosed is an aza-spirobifluorene derivative characterized by the following structural formula: formula (1), where only one of X 1 , X 2 , X 3 , and X 4 is a nitrogen atom while the other three are carbon atoms, R is an aromatic or heteroaromatic ring containing 6-60 carbon atoms. The aza-spirobifluorene derivative of the present invention is applicable as a luminescent material, comprising luminescence either independently as a luminescent layer or as a doping dye or luminescence by forming an exciplex with other materials, also is provided with the capability for carrier transfer, and the groups are provided with the capabilities for hole transport and electron transport. The aza-spirobifluorene derivative of the present invention can form a great amorphous film by means of vacuum deposition or a solution method (spin coating, printing, and press printing) and, at the same time, has improved thermal and light stability. |