Composition, film, organic light emitting element, method for providing light emitting composition, and program
AssigneeKyulux, Inc.
InventorsHayato Kakizoe, Hiroaki Ozawa, Ayataka Endo, YuSeok Yang
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Abstract
An organic light emitting element produced by using a light emitting composition that contains both a first compound having a PBHT value more than 0.730 and a second compound having ES1 lower than that of the first compound and ΔEST less than 0.20 eV is excellent in durability. ES1 is the lowest excited singlet energy level, ΔEST is the difference between the lowest excited singlet energy level and the lowest excited triplet energy level.
Claims27
A composition consisting of both a first compound satisfying the following expression (1a) and a second compound satisfying the following expression (2b), or consisting of a first compound satisfying the following expression (1a), a second compound satisfying the following expression (2b) and a third compound that is a fluorescence material,
- the first compound and the second compound satisfying the following expression (A):
- PBHT(1)>0.830 expression (1a)
- ΔEST(2)<0.20 eV expression(2b)
- ES1(1)>ES1(2) expression (A)
- the first compound, the second compound and the third compound satisfying the following expression (B):
- ES1(1)>ES1(2)>ES1(3) expression (B)
- wherein PBHT(1) is a PBHT value of the first compound, ΔEST(2) is a difference between a lowest excited singlet energy level ES1(2) of the second compound and a lowest excited triplet energy level ET1(2) of the second compound, and ES1(1) is a lowest excited singlet energy level of the first compound, and ES1(3) is a lowest excited singlet energy level of the third compound.
Dependencies are inferred from the claim text.