CPC H10K 50/11 (2023.02) [C09K 11/02 (2013.01); C09K 11/06 (2013.01); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 85/321 (2023.02); H10K 85/611 (2023.02); H10K 85/622 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1029 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/1092 (2013.01); H10K 85/615 (2023.02); H10K 85/624 (2023.02); H10K 85/654 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02)] | 15 Claims |
9. A light-emitting device comprising:
a thermally activated delayed fluorescent substance and a fluorescent material in a light-emitting layer,
wherein the thermally activated delayed fluorescent substance comprises a first organic compound and a second organic compound,
wherein the first organic compound and the second organic compound form an exciplex,
wherein a peak wavelength of an emission spectrum of the thermally activated delayed fluorescent substance is longer than or equal to a peak wavelength of an absorption band on the lowest energy side in an absorption spectrum of the fluorescent material, and
wherein the fluorescent material emits fluorescence.
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