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US 12,402,218 B2Granted
Organic electroluminescent device
AssigneeUDC Ireland Limited
InventorAkira Takeda
Life of this patent
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Abstract
An organic electroluminescent device includes a pair of electrodes; and an organic layer between the pair of electrodes, which includes a light-emitting layer, wherein the organic layer contains a compound represented by the following formula (I); and the light-emitting layer contains a iridium complex phosphorescent material: wherein R1, R2, R3, R4, R5, R6, R7 and R8 each represents a hydrogen atom or a substituent, and contiguous substituents of R1 to R8 may be bonded to each other to form a condensed ring; R9 represents an alkyl group, an alkenyl group, an aryl group, a hetero-aryl group, or a silyl group, and each of which group may be substituted with a substituent; and at least one of R1 to R9 represents a deuterium atom or a substituent containing a deuterium atom.
Claims21
A compound of Formula (I)
- wherein
- R1, R2, R3, R4, R5, R6, R7 and R8 each represents a hydrogen atom or a substituent, and contiguous substituents of R1 to R8 may be bonded to each other to form a condensed ring;
- R9 represents an aryl group, a hetero-aryl group, or a silyl group, each of which group may be substituted with a substituent;
- at least one of R1 to R9 represents a deuterium atom or a substituent containing a deuterium atom;
- the substituent is selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a hetero-aryl group, an amino group, an alkoxyl group, an aryloxy group, a heterocyclic oxy group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfonylamino group, a sulfamoyl group, a carbamoyl group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfonyl group, a sulfinyl group, a ureido group, a phosphoric acid amido group, a hydroxyl group, a mercapto group, a cyano group, a sulfo group, a carboxyl group, a nitro group, a hydroxamic acid group, a sulfino group, a hydrazino group, an imino group, a heterocyclic group, a silyl group, a silyloxy group, and a deuterium atom;
- each substituent may further be substituted with other substituents, and these substituents may be bonded to each other to form a ring;
- and
- wherein at least one of the following conditions (i)-(iii) is true:
- (i) the compound comprises at least three carbazole groups;
- (ii) at least one of R3 and R6 is carbazole or silyl which may be substituted with a substituent;
- and
- (iii) two structures comprising carbazole and R1 to R8 are bonded to R9, and where the two structures comprising carbazole and R1 to R8 can be the same or different;
- provided that the compound is not
10 more elements
An organic electroluminescent device comprising:
- a pair of electrodes;
- and
- an organic layer between the pair of electrodes, which comprises a light-emitting layer;
- wherein the organic layer contains a compound represented by the following Formula (I);
- wherein
- R1, R2, R3, R4, R5, R6, R7 and R8 each represents a hydrogen atom or a substituent, and contiguous substituents of R1 to R8 may be bonded to each other to form a condensed ring;
- R9 represents an aryl group, a hetero-aryl group, or a silyl group, each of which group may be substituted with a substituent;
- at least one of R1 to R9 represents a deuterium atom or a substituent containing a deuterium atom;
- the substituent is selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a hetero-aryl group, an amino group, an alkoxyl group, an aryloxy group, a heterocyclic oxy group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfonylamino group, a sulfamoyl group, a carbamoyl group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfonyl group, a sulfinyl group, a ureido group, a phosphoric acid amido group, a hydroxyl group, a mercapto group, a cyano group, a sulfo group, a carboxyl group, a nitro group, a hydroxamic acid group, a sulfino group, a hydrazino group, an imino group, a heterocyclic group, a silyl group, a silyloxy group, and a deuterium atom;
- each substituent may further be substituted with other substituents, and these substituents may be bonded to each other to form a ring;
- and
- wherein at least one of the following conditions (i)-(iii) is true:
- (i) the compound comprises at least three carbazole groups;
- (ii) at least one of R3 and R6 is carbazole or silyl which may be substituted with a substituent;
- and
- (iii) two structures comprising carbazole and R1 to R8 are bonded to R9, and where the two structures comprising carbazole and R1 to R8 can be the same or different;
- provided that the compound is not
14 more elements
Dependencies are inferred from the claim text.