Bipolar thermal activation delayed fluorescent material, preparation method thereof and organic electroluminescent diode device

The invention relates to a bipolar thermal activation delayed fluorescent material, a preparation method thereof and an organic electroluminescent diode device. The bipolar thermal activation delayedfluorescent material has the general structure shown in formula 1, the top of the formula 1, the middle of the formula 1, wherein R1 represents a chemical group taken as an electron acceptor and R2represents a chemical group taken as an electron donor: According to the invention, 100% of internal quantum utilization efficiency of a TADF material is utilized, and the bipolar thermal activation delayed fluorescent material is used as a main materialof the traditional fluorescent material andis applied to the organic electroluminescent diode device, so that a fluorescent device can achieve the device efficiency comparable to that of a phosphorescent device of a phosphorescent heavy metal complex, the exciton utilization rate is greatly improved, meanwhile, the problems of poor color gamut, long exciton service life a