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US 2023/0113918 A1Published application
Host material, composition, and organic electroluminescent element
AssigneeKyulux, Inc.
InventorHiroaki OZAWA
Life of this patent
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Abstract
To improve the emission efficiency, the driving voltage and the lifetime of an organic light-emitting device using a delayed fluorescent material. A host material for a delayed fluorescent material, containing a compound represented by the following general formula: R1 to R5 each are a substituent not containing a cyano group. n1 to n5 each are 0 to 4, Ar is a monocyclic arylene group or a monocyclic heteroarylene group.
Claims19
A host material for use along with a delayed fluorescent material, comprising a compound having a structure represented by the following formula (1):
- wherein R1 to R5 each independently represent a substituent not containing a cyano group, R1 to R5 do not bond to the other R1 to R5 or Ar to form a cyclic structure, but neighboring R3's can bond to each other to form a benzofuro structure or a benzothieno structure;
- n1, n3 and n5 each independently represent an integer of any of 0 to 4, n2 represents an integer of any of 0 to 3, n4 represents an integer of any of 0 to 2;
- X represents an oxygen atom or a sulfur atom;
- Ar represents a monocyclic arylene group or a monocyclic heteroarylene group, and the monocyclic arylene group and the monocyclic heteroarylene group can be substituted with a substituent not containing a cyano group.
1 more element
Dependencies are inferred from the claim text.