Bi-component organic long-afterglow material with phosphorescence and delayed fluorescence simultaneously as well as preparation and application of bi-component organic long-afterglow material

The invention provides a bi-component organic long-afterglow material with phosphorescence and delayed fluorescence at the same time as well as preparation and application of the bi-component organic long-afterglow material. A 9, 9-spirobifluorene group is introduced into a dicarbonyl fluorine boron luminescent molecule, so that the molecule shows stronger fluorescence in solutions with different polarities, and the fluorescence lifetime in the solutions reaches nanosecond level; solid molecules also show relatively strong fluorescence and relatively high quantum yield; the material prepared by double-component doping shows the characteristic of long-afterglow luminescence, the doped material has TADF and room-temperature phosphorescence at the same time, and the afterglow lasting time reaches 8 seconds or longer. 本发明提供了一类同时具有磷光和延迟荧光的双组分有机长余辉材料及其制备与应用。在二羰基氟硼类发光分子中引入9，9-螺二芴基团，使该类分子在不同极性的溶液中都表现处较强的荧光，溶液中荧光寿命达到纳秒级；固态分子同样表现出较强荧光和较高的量子产率；通过双组分掺杂制备的材料表现出长余辉发光的特点，掺杂材料同时具有TADF和室温磷光，余辉持续时间达到8秒以上。