In one embodiment, and the thermally activated delayed fluorescent material is a fluorescent host material used in the organic light emitting diode display device.

In one embodiment, and the thermally activated delayed fluorescent material is an electron transporting material used in the organic light emitting diode display device.

A thermally activated delayed fluorescent material includes a structural formula (I) as follows:

and D1 and D2 are different electron donors, and the D1 includes one of following chemical structural formulas:

and R1 is selected one from an oxygen or a C1-C3 alkyl group;

and the R2 selected one from a C1-C3 alkyl or a silane group;