| abstract |
The present invention provides a thermally activated delayed fluorescent material, its synthesis method and an OLED device using the thermally activated delayed fluorescent material. The structure of the thermally activated delayed fluorescent material is shown in formula (1): formula (1), Wherein Ar 1 and Ar 2 are the same or different, and Ar 1 and Ar 2 are groups composed of carbazole or/and phenothiazine; the thermally activated delayed fluorescent material has a higher glass transition temperature and high thermal stability and excellent luminescence properties, its synthesis method is simple, easy to purify, high yield, and can adjust the luminescence properties, thermal properties, etc. The fluorescence efficiency of the layer is high and the stability is good, so that the luminous efficiency and service life of the OLED device can meet the practical requirements. |