| abstract |
The invention relates to a high-efficiency blue-green to orange-red photothermally activated delayed fluorescent material, as well as its preparation method and application. The present invention solves the problems of the prior art, and synthesizes a series of thermally activated delayed fluorescent materials with lower single triplet energy level difference, high luminous efficiency, and fast reverse intersystem crossing constant through ingenious molecular design, and at the same time The fine-tuning of the structure is realized so that the spectrum covers the bands from blue-green light to orange-red light. Their structures were confirmed by nuclear magnetic hydrogen spectroscopy and mass spectrometry analysis, and then their photophysical properties were studied in detail. Finally, a series of high-performance OLEDs were prepared based on the application of these light-emitting TADF materials to the light-emitting layer, with huge Application prospect and economic value. |