US 2021/0202858 A1 · ORGANIC ELECTRIC ELEMENT, DISPLAY PANEL COMPRISING THE SAME AND DISPLAY DEVICE COMPRISING THE SAME

Abstract

Provided are an organic electric element, a display panel and a display device including the organic electric element which include a charge generating layer including a first layer comprising a first compound and a second compound and a second layer comprising a third compound so that they may have excellent efficiency or lifespan.

An organic electric element comprising:

a first electrode;
a second electrode;
and
an organic layer positioned between the first electrode and the second electrode,
wherein the organic layer comprises a first stack comprising a first emitting layer, a second stack comprising a second emitting layer, and a charge generating layer positioned between the first stack and the second stack,
the charge generating layer comprises a first layer and a second layer,
the first layer comprises a first compound represented by one or more of the following chemical formula 1 and chemical formula 2 and a second compound represented by the following chemical formula 3, and
the second layer comprises a third compound represented by the following chemical formula 4:
in the chemical formula 1 and the chemical formula 2,
R1 to R6, which are same or different, are each independently one selected from the group consisting of a hydrogen;
a deuterium;
a tritium;
a halogen;
a cyano group;
a nitro group;
a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C1-C30 alkoxy group;
a C6-C30 aryloxy group;
a C3-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group, and one or more of R1 to R6 is the cyano group,
A1 to A4, which may be the same or different, are each independently one selected from the group consisting of a hydrogen;
a deuterium;
a tritium;
a halogen;
a cyano group;
a nitro group;
a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C1-C30 alkoxy group;
a C6-C30 aryloxy group;
a C3-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group,
In R1 to R6 and A1 to A4 of the chemical formula 1 and the chemical formula 2, the aryl group, the fluorenyl group, the hetero ring group, the fused ring group, the alkyl group, the alkenyl group, the alkynyl group, the alkoxy group, the aryloxy group, the alkylsilyl group, the arylsilyl group and the alkylarylsilyl group may each be further substituted with at least one substituent selected from the group consisting of a deuterium;
a nitro group;
a cyano group;
a halogen;
an amino group;
a C1-C20 alkoxyl group;
a C1-C20 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C6-C20 aryl group;
a C6-C20 aryl group substituted with the deuterium;
a fluorenyl group;
a C2-C20 hetero ring group;
a C3-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group,
in the chemical formula 3,
m is an integer from 0 to 4,
n is an integer from 0 to 3, and
o and p are each independently 0 or 1, o+p is 1 or more,
R1 is each independently one selected from the group consisting of a deuterium;
a tritium;
a halogen;
a cyano group;
a nitro group;
a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C1-C30 alkoxy group;
a C6-C30 aryloxy group;
a C3-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group,
R2 and R3, which may be the same or different, are each independently one selected from the group consisting of a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkyl group,
L1 is, i) when p is 1, one selected from the group consisting of a C6-C60 arylene group;
a fluorylene group;
a C2-C60 divalent hetero ring group containing at least one heteroatom from O, N, S, Si and P;
a divalent fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkylene group;
a C2-C20 alkenylene group;
and a C2-C20 alkynylene group;
ii) when p is 0, one selected from the group consisting of a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring,
L2 is i) when p is 1, one selected from the group consisting of a C6-C60 arylene group;
a fluorylene group;
a C2-C60 divalent hetero ring group containing at least one heteroatom from O, N, S, Si and P;
a divalent fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkylene group;
a C2-C20 alkenylene group;
and a C2-C20 alkynylene group;
and ii) when p is 0;
one selected from the group consisting of a hydrogen;
a deuterium;
a tritium;
a halogen;
a cyano group;
a nitro group;
a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C1-C30 alkoxy group;
a C6-C30 aryloxy group;
a C3-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group,
in R1 to R3, L1 and L2 of the chemical formula 3, the aryl group, the fluorenyl group, the hetero ring group, the fused ring group, the alkyl group, the alkenyl group, the alkynyl group, the alkoxy group, the aryloxy group, the alkylsilyl group, the arylsilyl group, the alkylarylsilyl group, the arylene group, the fluorylene group, the alkylene group, the alkenylene group and the alkynylene group may each be further substituted with at least one substituent selected from the group consisting of a deuterium;
a nitro group;
a cyano group;
a halogen;
an amino group;
a C1-C20 alkoxyl group;
a C1-C20 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C6-C20 aryl group;
a C6-C20 aryl group substituted with the deuterium;
a fluorenyl group;
a C2-C20 hetero ring group;
a C3-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group,
In the chemical formula 4, R1 to R6 which are same or different, are each independently one selected from the group consisting of a hydrogen;
a deuterium;
a tritium;
a halogen;
a cyano group;
a nitro group;
a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C1-C30 alkoxy group;
a C6-C30 aryloxy group;
a C3-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group, and one or more of R1 to R6 is the cyano group,
Ar1 and Ar2, which are same or different, are each independently one selected from the group consisting of a hydrogen;
a deuterium;
a tritium;
a halogen;
a cyano group;
a nitro group;
a C6-C60 aryl group;
a fluorenyl group;
a C2-C60 hetero ring group containing at least one hetero atom from O, N, S, Si and P;
a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
a C1-C50 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C1-C30 alkoxy group;
a C6-C30 aryloxy group;
a C2-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C8-C60 alkylarylsilyl group, and one or more of R1 to R6 is the cyano group,
L is one selected from the group consisting of a C6-C60 arylene group;
a fluorylene group;
a C2-C60 divalent hetero ring group containing at least one heteroatom from O, N, S, Si and P;
a divalent fused ring group of a C2-C60 aliphatic ring and a C6-C60 aromatic ring, and
in R1 to R6, Ar1, Ar2 and L of the chemical formula 4, the aryl group, the fluorenyl group, the hetero ring group, the fused ring group, the alkyl group, the alkenyl group, the alkynyl group, the alkoxy group, the aryloxy group, the alkylsilyl group, the arylsilyl group, the alkylarylsilyl group, the arylene group, the fluorylene group, the divalent fused ring group, the divalent fused ring group may each be further substituted with at least one substituent selected from the group consisting of a deuterium;
a nitro group;
a cyano group;
a halogen;
an amino group;
a C1-C20 alkoxyl group;
a C1-C20 alkyl group;
a C2-C20 alkenyl group;
a C2-C20 alkynyl group;
a C6-C20 aryl group;
a C6-C20 aryl group substituted with the deuterium;
a fluorenyl group;
a C2-C20 hetero ring group;
a C8-C60 alkylsilyl group;
a C18-C60 arylsilyl group;
and a C2-C60 alkylarylsilyl group.

193 more elements

Organic electric element, display panel comprising the same and display device comprising the same

Life of this patent

Organic electric element, display panel comprising the same and display device comprising the same

Life of this patent

Abstract

Claims15