Organic electroluminescence device and electronic apparatus provided with the same
An organic electroluminescence device including a cathode, an anode, and an emitting layer disposed between the cathode and the anode, wherein the emitting layer contains a compound represented by the following formula (1) and one or more compounds selected from the group consisting of compounds represented by formulas (11), (21), (31), (41), (51), (61), (71) and (81). In the formula (1), at least one of R 1 to R 8 is a deuterium atom.
1. An organic electroluminescence device comprising:
a cathode,
an anode, and
an emitting layer disposed between the cathode and the anode, wherein
the emitting layer comprises a compound represented by the following formula (1A) and a compound represented by the following formula (43D):
wherein in the formula (1A),
R 11 to R 18 are independently a hydrogen atom;
at least one of R 11 to R 18 is a deuterium atom;
adjacent two or more of R 11 to R 14 do not form a ring and adjacent two or more of R 15 to R 18 do not form a ring;
L 11 and L 12 are independently a single bond, an unsubstituted phenylene group, or an unsubstituted naphthylene group; and
Ar 11 and Ar 12 are independently an unsubstituted phenyl group, or an unsubstituted naphthyl group;
wherein in the formula (43D),
R 4611 is a hydrogen atom, an unsubstituted alkyl group including 1 to 6 carbon atoms, an unsubstituted cycloalkyl group including 3 to 10 ring carbon atoms, —Si(R 911 )(R 912 )(R 913 ), or —N(R 914 )(R 915 ),
R 4612 to R 4615 are independently an unsubstituted alkyl group including 1 to 6 carbon atoms, an unsubstituted cycloalkyl group including 3 to 10 ring carbon atoms, or —Si(R 911 )(R 912 )(R 913 );
R 911 to R 913 are independently an unsubstituted alkyl group including 1 to 6 carbon atoms or an unsubstituted aryl group including 6 to 18 ring carbon atoms; and
R 914 to R 915 are independently an unsubstituted aryl group including 6 to 18 ring carbon atoms.
2. The organic electroluminescence device according to claim 1 , wherein in the formula (1A), at least two of R 11 to R 18 are deuterium atoms.
3. The organic electroluminescence device according to claim 1 , wherein in the formula (1A), R 11 to R 18 are all deuterium atoms.
4. The organic electroluminescence device according to claim 1 , wherein in the formula (1A), at least one hydrogen atom contained in one or more selected from a group consisting of Ar 11 and Ar 12 is a deuterium atom.
5. The organic electroluminescence device according to claim 1 , wherein in the emitting layer is represented by the following formula:
Protium
Compound
Compound
of
Formula
(
1
A
)
+
Protium
Compound
=
99
mol
%
or
less
(
in
the
emitting
layer
)
wherein the protium compound is a compound having the same structure as the compound represented by formula (1A) except that the compound represented by the formula (1A) contains only protium atoms as hydrogen atoms.
6. The organic electroluminescence device according to claim 1 , wherein in the formula (43D), R 4611 is a hydrogen atom, an unsubstituted alkyl group including 1 to 6 carbon atoms, or —N(R 914 )(R 915 ).
7. The organic electroluminescence device according to claim 1 , wherein in the formula (43D), R 4612 to R 4615 are independently an unsubstituted alkyl group including 1 to 6 carbon atoms or an unsubstituted cycloalkyl group including 3 to 10 ring carbon atoms.
8. The organic electroluminescence device according to claim 1 , wherein in the formula (43D), R 4611 is —N(R 914 )(R 915 ), and R 4612 to R 4615 are independently an unsubstituted alkyl group including 1 to 6 carbon atoms.
9. The organic electroluminescence device according to claim 1 , wherein in the formula (43D), R 4611 is an unsubstituted alkyl group including 1 to 6 carbon atoms, and R 4612 to R 4615 are independently an unsubstituted alkyl group including 1 to 6 carbon atoms.
10. The organic electroluminescence device according to claim 1 , wherein in the formula (43D), R 4611 is a hydrogen atom, and R 4612 to R 4615 are independently an unsubstituted alkyl group including 1 to 6 carbon atoms or an unsubstituted cycloalkyl group including 3 to 10 ring carbon atoms.
11. The organic electroluminescence device according to claim 1 , wherein in the formula (43D), at least one hydrogen atom contained in one or more selected from the group consisting of R 914 and R 915 is a deuterium atom.
12. The organic electroluminescence device according to claim 1 , wherein the compound represented by the formula (1A) is one or more selected from the group consisting of the compounds represented by the following formulas BH-1, BH-2, BH-4, BH-5 and BH-9; and
the compound represented by the formula (43D) is one or more selected from the group consisting of the compounds represented by the following formulas BD-9, BD-10, BD-11, and BD-12.
13. The organic electroluminescence device according to claim 1 , which further comprises a hole-transporting layer between the anode and the emitting layer.
14. The organic electroluminescence device according to claim 1 , which further comprises an electron-transporting layer between the cathode and the emitting layer.
15. An electronic appliance wherein the organic electroluminescence device according to claim 1 is provided.
16. The organic electroluminescence device according to claim 1 , wherein the compound represented by the formula (1A) is selected from the following compounds:
17. The organic electroluminescence device according to claim 1 ,
wherein in the emitting layer is represented by the following formula:
Protium
Compound
Compound
of
Formula
(
1
A
)
+
Protium
Compound
=
30
mol
%
or
more
(
in
the
emitting
layer
)
wherein the protium compound is a compound having the same structure as the compound represented by formula (1A) except that the compound represented by the formula (1A) contains only protium atoms as hydrogen atoms.