US 2022/0029103 A1Published application

Organic Light Emitting Device and a Compound for Use Therein

AssigneeNovaled GmbH

InventorsFrancois Cardinali, Johannes Scholz, Benjamin Schulze, Ulrich Denker

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Abstract

The present invention relates to a organic light emitting device comprising a cathode, an anode, a light emitting layer, at least one first electron transport layer and at least one second electron transport layer, wherein the light emitting layer, the first electron transport layer and the second electron transport layer are arranged between the cathode and the anode, wherein the first electron transport layer comprises a compound of formula (I) and the second electron transport layer comprises a compound of formula (II) as well as to a compound for use in an organic electronic device.

Claims16

Dependent claims

Organic light emitting device comprising a cathode, an anode, a light emitting layer, at least one first electron transport layer and at least one second electron transport layer, wherein the light emitting layer, the first electron transport layer and the second electron transport layer are arranged between the cathode and the anode,

wherein the first electron transport layer comprises a compound of formula (I)
L-M
wherein in formula (I)
L is selected from the C6 to C60 unsubstituted or substituted aryl, wherein the one or more substituents, if present, are independently selected from C2 to C24 alkenyl, C1 to C20 alkyl, C7 to C32 aryl-alkyl, C7 to C32 aryl-alkenyl;
M is substituted pyrimidine or substituted triazine, wherein the one or more substituents, are independently selected from C6 to C24 aryl wherein the C6 to C24 aryl may be unsubstituted or substituted with C1 to C3 alkyl;
L and M may be connected via a direct bond or via a spacer moiety selected from non-condensed C6 to C18 aryl which may be unsubstituted or substituted wherein the one or more substituents, if present, are independently selected from C6 to C12 aryl, C2 to C20 heteroaryl, and phosphine oxide group;
and
the compound of formula (I) has a molecular dipole moment of ≤5 Debye;
wherein the second electron transport layer comprises a compound of formula (II)
wherein in formula (II)
A1 is selected from unsubstituted or substituted C10 to C24 aryl comprising at least one aromatic ring system comprising at least two condensed 6-membered aromatic rings, wherein the one or more substituents, if present, are independently selected from C6 to C24 aryl, C2 to C20 heteroaryl and these substituents may be further substituted with a phosphine oxide group;
X1 is selected from unsubstituted or substituted C6 to C24 aryl, wherein the one or more substituents, if present, are independently selected from C6 to C12 aryl, C2 to C10 heteroaryl and these substituents may be further substituted with a phosphine oxide group or CN;
Y1 to Y3 are independently selected from N and CR2 provided that at least two of Y1 to Y3 are N, wherein the R2 is selected from H or C1 to C3 alkyl;
Z is selected from unsubstituted or substituted C6 to C24 aryl or unsubstituted or substituted C8 to C24 heteroaryl, wherein the one or more substituents, if present, are independently selected from C6 to C24 aryl, C1 to C20 alkyl, phosphine oxide group and CN;
and
R1 is selected from unsubstituted or substituted C6 to C24 aryl, wherein the one or more substituents, if present, are independently selected from C6 to C24 aryl, C1 to C20 alkyl, phosphine oxide group and CN.

13 more elements

Dependencies are inferred from the claim text.

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Abstract

wherein the first electron transport layer comprises a compound of formula (I)
L-M
wherein in formula (I)
L is selected from the C6 to C60 unsubstituted or substituted aryl, wherein the one or more substituents, if present, are independently selected from C2 to C24 alkenyl, C1 to C20 alkyl, C7 to C32 aryl-alkyl, C7 to C32 aryl-alkenyl;
M is substituted pyrimidine or substituted triazine, wherein the one or more substituents, are independently selected from C6 to C24 aryl wherein the C6 to C24 aryl may be unsubstituted or substituted with C1 to C3 alkyl;
L and M may be connected via a direct bond or via a spacer moiety selected from non-condensed C6 to C18 aryl which may be unsubstituted or substituted wherein the one or more substituents, if present, are independently selected from C6 to C12 aryl, C2 to C20 heteroaryl, and phosphine oxide group;
and
the compound of formula (I) has a molecular dipole moment of ≤5 Debye;
wherein the second electron transport layer comprises a compound of formula (II)
wherein in formula (II)
A1 is selected from unsubstituted or substituted C10 to C24 aryl comprising at least one aromatic ring system comprising at least two condensed 6-membered aromatic rings, wherein the one or more substituents, if present, are independently selected from C6 to C24 aryl, C2 to C20 heteroaryl and these substituents may be further substituted with a phosphine oxide group;
X1 is selected from unsubstituted or substituted C6 to C24 aryl, wherein the one or more substituents, if present, are independently selected from C6 to C12 aryl, C2 to C10 heteroaryl and these substituents may be further substituted with a phosphine oxide group or CN;
Y1 to Y3 are independently selected from N and CR2 provided that at least two of Y1 to Y3 are N, wherein the R2 is selected from H or C1 to C3 alkyl;
Z is selected from unsubstituted or substituted C6 to C24 aryl or unsubstituted or substituted C8 to C24 heteroaryl, wherein the one or more substituents, if present, are independently selected from C6 to C24 aryl, C1 to C20 alkyl, phosphine oxide group and CN;
and
R1 is selected from unsubstituted or substituted C6 to C24 aryl, wherein the one or more substituents, if present, are independently selected from C6 to C24 aryl, C1 to C20 alkyl, phosphine oxide group and CN.

13 more elements