Organic electroluminescence element, composition, powder, electronic equipment, and novel compound

Patent metadata

Field	Value
Publication number	US-12581850-B2
Application number	US-202017633887-A
Country	US
Kind code	B2
Filing date	Dec 25, 2020
Priority date	Dec 26, 2019
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

An organic electroluminescence device including: a cathode; an anode; and at least one emitting layer disposed between the cathode and the anode, wherein the emitting layer contains a first host material, a second host material, and a dopant material, wherein the first host material is a compound represented by the following formula (1), the second host material is a compound represented by the following formula (2), and the first host material and the second host material are different compounds.

First claim

The invention claimed is:

1 . An organic electroluminescence device comprising:
a cathode; an anode; and at least one emitting layer disposed between the cathode and the anode, wherein the emitting layer comprises a first host material, a second host material, and a dopant material, the first host material is a compound represented by the following formula (1), the second host material is a compound represented by the following formula (2), and the first host material and the second host material are different compounds:

wherein in the formula (1),
R 1A to R 8A are independently

a hydrogen atom,
a substituent R, or
a group represented by the following formula (1A);
the substituent R is

a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms,
a substituted or unsubstituted alkenyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted alkynyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms,
—Si(R 901 )(R 902 )(R 903 ),
—O—(R 904 ),
—S—(R 905 ),
—N(R 906 )(R 907 ),
a halogen atom, a cyano group, a nitro group,
a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms;
when two or more of the substituents R are present, the two or more of the substituents R may be the same as or different from each other;
L 1A 's are independently

a single bond,
a substituted or unsubstituted arylene group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted divalent heterocyclic group including 5 to 50 ring atoms;
Ar 1A 's are independently

a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms;
R 901 to R 907 are independently

a hydrogen atom,
a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms,
a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms,
a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms;
when two or more of each of R 901 to R 907 are present, the two or more of each of R 901 to R 907 are the same as or different from each other;
L 1A -Ar 1A   (1A)

wherein in the formula (1A),
L 1A and Ar 1A are as defined in the formula (1); and
when two or more groups represented by the formula (1A) are present, the two or more of the groups represented by the formula (1A) may be the same as or different from each other,

wherein in the formula (2),
X 11B is an oxygen atom or a sulfur atom;
one or more sets of adjacent two or more of R 14B to R 17B form a substituted or unsubstituted, saturated or unsaturated ring by bonding with each other;
one or more sets of adjacent two or more of R 11B to R 13B form a substituted or unsubstituted, saturated or unsaturated ring by bonding with each other, or do not form a substituted or unsubstituted, saturated or unsaturated ring;
R 1B to R 8B , and R 11B to R 17B which do not form the substituted or unsubstituted, saturated or unsaturated ring are independently
a hydrogen atom,
a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms,
a substituted or unsubstituted alkenyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted alkynyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms,
—Si(R 901 )(R 902 )(R 903 ),
—O—(R 904 ),
—S—(R 905 ),
—N(R 906 )(R 907 ),
a halogen atom, a cyano group, a nitro group,
a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms;
L 1B and L 2B are independently

a single bond,
a substituted or unsubstituted arylene group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted divalent heterocyclic group including 5 to 50 ring atoms;
Ar 1B is

a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms; and
R 901 to R 907 are as defined in the formula (1),

wherein the dopant material comprises a compound represented by the following formula (31):

wherein in the formula (31),
one or more sets of adjacent two or more of R 301 to R 307 and R 311 to R 317 form a substituted or unsubstituted, saturated or unsaturated ring by bonding with each other, or do not form a substituted or unsubstituted, saturated or unsaturated ring;
R 301 to R 307 and R 311 to R 317 which do not form the substituted or unsubstituted, saturated or unsaturated ring are independently

a hydrogen atom,
a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms,
a substituted or unsubstituted alkenyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted alkynyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms,
—Si(R 901 )(R 902 )(R 903 ),
—O—(R 904 ),
—S—(R 905 ),
—N(R 906 )(R 907 ),
a halogen atom, a cyano group, a nitro group,
a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms;
R 321 and R 322 are independently

a hydrogen atom,
a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms,
a substituted or unsubstituted alkenyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted alkynyl group including 2 to 50 carbon atoms,
a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms,
—Si(R 901 )(R 902 )(R 903 ),
—O—(R 904 ),
—S—(R 905 ),
—N(R 906 )(R 907 ),
a halogen atom, a cyano group, a nitro group,
a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, or
a substituted or unsubstituted monovalent heterocyclic group including 5 to 50 ring atoms; and
R 901 to R 907 are as defined in the formula (1).

2 . The organic electroluminescence device according to claim 1 , wherein in the formula (31), at least one of R 301 to R 307 and R 311 to R 317 is a group represented by —N(R 906 )(R 907 ).

3 . The organic electroluminescence device according to claim 1 , wherein in the formula (31), at least two of R 301 to R 307 and R 311 to R 317 are groups represented by —N(R 906 )(R 907 ).

4 . The organic electroluminescence device according to claim 1 , wherein the compound represented by t

Assignees

• Idemitsu Kosan Co

Inventors

• Lee Yongguk
• Maeda Ryoji
• Nakano Yuki
• Itoi Hiroaki

Classifications

• H10K50/12

  comprising dopants · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• H10K85/6572

  comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole · CPC title

• H10K50/11 Primary

  characterised by the electroluminescent [EL] layers · CPC title

• H10K85/6574

  comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes · CPC title