Organic electroluminescent element and electronic device
An organic electroluminescence device includes: an anode; a cathode; a first emitting layer; and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains, as a first host material, a first compound that has at least one group represented by a formula (11) below and that is represented by a formula (1) below, the second emitting layer contains, as a second host material, a second compound represented by a formula (2) below, the second compound has at least one deuterium atom, and the first emitting layer and the second emitting layer are in direct contact with each other.
1 . An organic electroluminescence device comprising:
an anode;
a cathode;
a first emitting layer provided between the anode and the cathode; and
a second emitting layer provided between the first emitting layer and the cathode, wherein
the second emitting layer comprises, as a second host material, a second compound represented by a formula (2) below, and
the second compound comprises at least one deuterium atom,
where, in the formula (2):
R 201 to R 208 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms;
at least one of R 201 to R 208 is a deuterium atom;
L 201 and L 202 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms;
Ar 201 and Ar 202 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms,
in the second compound represented by the formula (2), R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms;
when a plurality of R 901 are present, the plurality of R 901 are mutually the same or different;
when a plurality of R 902 are present, the plurality of R 902 are mutually the same or different;
when a plurality of R 903 are present, the plurality of R 903 are mutually the same or different;
when a plurality of R 904 are present, the plurality of R 904 are mutually the same or different;
when a plurality of R 905 are present, the plurality of R 905 are mutually the same or different;
when a plurality of R 906 are present, the plurality of R 906 are mutually the same or different;
when a plurality of R 907 are present, the plurality of R 907 are mutually the same or different;
when a plurality of R 801 are present, the plurality of R 801 are mutually the same or different; and
when a plurality of R 802 are present, the plurality of R 802 are mutually the same or different, wherein
the first emitting layer comprises, as a first host material, a first compound that comprises at least one group represented by a formula (11) below and that is represented by a formula (1) below,
where, in the formula (1):
R 101 to R 110 are each independently a hydrogen atom, an unsubstituted phenyl group, an unsubstituted biphenyl group, an unsubstituted naphthyl group, or a substituted or unsubstituted fluorenyl group or a group represented by the formula (11);
one of R 101 to R 110 is a group represented by the formula (11);
when R 101 to R 110 are each independently a substituted fluorenyl group, each substituent is independently an unsubstituted alkyl group having 1 to 6 carbon atoms, an unsubstituted phenyl group, an unsubstituted biphenyl group, or an unsubstituted terphenyl group;
L 101 is selected from the group consisting of a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted benzoanthryl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted xanthenyl group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted naphthobenzofuran group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted naphthobenzothiophenyl group, with one hydrogen atom removed;
Ar 101 is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms; and
m x is 1.
2 . The organic electroluminescence device according to claim 1 , wherein
the first compound comprises at least one deuterium atom.
3 . The organic electroluminescence device according to claim 1 , wherein
the second compound is a compound represented by a formula (20-1B) below,
where, in the formula (20-1B):
R 201 to R 208 , L 201 , L 202 and Ar 22 each independently represent the same as R 201 to R 208 , L 201 , L 202 and Ar 202 in the formula (2); and
Ar 21 is a monovalent group having a structure represented by one of formulae (2-11B) to (2-13B) below,
where, in the formulae (2-11B) to (2-13B):
X 1b is an oxygen atom, a sulfur atom, or NR 301 , and R 301 is a hydrogen atom or a substituent;
R 41 to R 50 are each independently a hydrogen atom or a substituent, or at least one combination of a combination of R 41 and R 42 , a combination of R 42 and R 43 , a combination of R 43 and R 44 , a combination of R 45 and R 46 , a combination of R 46 and R 47 , a combination of R 47 and R 48 , a combination of R 48 and R 49 , or a combination of R 49 and R 50 are mutually bonded to form a monocyclic ring or a fused ring;
R 41 to R 50 and R 301 serving as a substituent are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms;
in the formula (20-1B):
when L 201 is a linking group, one of R 41 to R 50 in the formulae (2-11B) to (2-13B) is a single bond bonded to L 201 ; and
when L 201 is a single bond, one of R 41 to R 50 is a single bond bonded to a carbon atom present at a position *b11 in the formula (20-1B);
in the second compound represented by the formula (20-1B), R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in second compound represented by the formula (2).
4 . The organic electroluminescence device according to claim 3 , wherein
Ar 22 is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, and
a substituent, if present, for Ar 22 is each independently selected from the group consisting of an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms.
5 . The organic electroluminescence device according to claim 3 , wherein
the second compound is a compound represented by a formula (220B) below,
where, in the formula (220B):
R 201 to R 208 , L 201 , L 202 and Ar 22 each independently represent the same as R 201 to R 208 , L 201 , L 202 and Ar 22 in the formula (20-1B); and
X 1b , R 41 to R 42 and R 44 to R 50 each independently represent the same as X 1b , R 41 to R 42 and R 44 to R 50 in the formula (2-12B).
6 . The organic electroluminescence device according to claim 3 , wherein
the second compound is a compound represented by a formula (230B) below,
where, in the formula (230B):
R 201 to R 208 , L 202 and Ar 22 each independently represent the same as R 201 to R 208 , L 202 and Ar 22 in the formula (20-1B); and
X 1b , R 41 to R 42 and R 44 to R 50 each independently represent the same as X 1b , R 41 to R 42 and R 44 to R 50 in the formula (2-12B).
7 . The organic electroluminescence device according to claim 3 , wherein
the combination of R 41 and R 42 , the combination of R 42 and R 43 , the combination of R 43 and R 44 , the combination of R 45 and R 46 , the combination of R 46 and R 47 , the combination of R 47 and R 48 , the combination of R 48 and R 49 , and the combination of R 49 and R 50 are not mutually bonded.
8 . The organic electroluminescence device according to claim 1 , wherein
the second compound is a compound represented by one of formulae (20-1A) to (20-4A) below,
where, in the formulae (20-1A) to (20-4A):
R 201 to R 208 , L 201 , L 202 and Ar 22 each independently represent the same as R 201 to R 208 , L 201 , L 202 and Ar 202 in the formula (2);
X 1a is an oxygen atom, a sulfur atom, or NR 300 ; and
R 31 to R 38 and R 300 each independently represent the same as R 201 to R 208 in the formula (2).
9 . The organic electroluminescence device according to claim 3 , wherein
R 41 to R 50 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms.
10 . The organic electroluminescence device according to claim 8 , wherein
R 31 to R 38 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms.
11 . The organic electroluminescence device according to claim 3 , wherein
a group represented by -L 202 -Ar 22 is a group represented by one of (2-11a) to (2-30a) below,
where, in the formulae (2-11a) to (2-30a):
Ra to Rf are each independently selected from the group consisting of a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms;
R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in the second compound represented by the formula (2); and
* represents a bonding position.
12 . The organic electroluminescence device according to claim 11 , wherein
Ra to Rf are each a hydrogen atom, and
at least one of Ra to Rf is a deuterium atom.
13 . The organic electroluminescence device according to claim 3 , wherein
R 41 to R 50 are each a hydrogen atom, and
at least one of R 41 to R 50 is a deuterium atom.
14 . The organic electroluminescence device according to claim 8 , wherein
R 31 to R 38 are each a hydrogen atom, and
at least one of R 31 to R 38 is a deuterium atom.
15 . The organic electroluminescence device according to claim 1 , wherein
the second compound is a compound represented by a formula (201) below,
where, in the formula (201), R 201 to R 208 , L 201 and Ar 201 each independently represent the same as R 201 to R 208 , L 201 and Ar 201 in the formula (2).
16 . The organic electroluminescence device according to claim 15 , wherein
in the formula (201), all hydrogen atoms in an unsubstituted phenyl group bonded to a carbon atom present at *11 are each a deuterium atom.
17 . The organic electroluminescence device according to claim 1 , wherein
the second compound is a compound represented by a formula (202) or (203) below,
where, in the formula (202), R 201 to R 208 , L 201 and Ar 201 each independently represent the same as R 201 to R 208 , L 201 and Ar 201 in the formula (2),
where, in the formula (203), R 201 to R 208 , L 201 and Ar 201 each independently represent the same as R 201 to R 208 , L 201 and Ar 201 in the formula (2).
18 . The organic electroluminescence device according to claim 17 , wherein
in the formula (202), all hydrogen atoms in an unsubstituted naphthyl group bonded to a carbon atom present at *12 are each a deuterium atom, and
in the formula (203), all hydrogen atoms in an unsubstituted naphthyl group bonded to a carbon atom present at *13 are each a deuterium atom.
19 . The organic electroluminescence device according to claim 1 , wherein
L 201 and L 202 are each independently a single bond, or a group represented by one of formulae (2-1a) to (2-4a) below,
where, in the formulae (2-1a) to (2-4a):
Ra 1 to Re 1 are each independently selected from the group consisting of a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms;
R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in the second compound represented by the formula (2); and
*1 and *2 each represent a bonding position.
20 . The organic electroluminescence device according to claim 19 , wherein
Ra 1 to Re 1 are each a hydrogen atom, and
at least one of Ra 1 to Re 1 is a deuterium atom.
21 . The organic electroluminescence device according to claim 1 , wherein
one or both of L 201 and L 202 are a single bond.
22 . The organic electroluminescence device according to claim 15 , wherein
Ar 201 is a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted diphenylfluorenyl group, a substituted or unsubstituted dimethylfluorenyl group, a substituted or unsubstituted benzodiphenylfluorenyl group, a substituted or unsubstituted benzodimethylfluorenyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothienyl group, a substituted or unsubstituted naphthobenzofuranyl group, or a substituted or unsubstituted naphthobenzothienyl group.
23 . The organic electroluminescence device according to claim 15 , wherein
a group represented by -L 201 -Ar 201 is a group represented by one of formulae (2-11a) to (2-41a) below,
where, in the formulae (2-11a) to (2-41a):
Ra to Rg are each independently selected from the group consisting of a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms;
R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in the second compound represented by the formula (2); and
* represents a bonding position.
24 . The organic electroluminescence device according to claim 23 , wherein
Ra to Rg are each a hydrogen atom, and
at least one of Ra to Rg is a deuterium atom.
25 . The organic electroluminescence device according to claim 1 , wherein
R 201 to R 208 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a cyano group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.
26 . The organic electroluminescence device according to claim 1 , wherein
in the second compound, R 202 or R 203 is a group represented by -L 203 -Ar 203 ;
L 203 is a single bond, or a substituted or unsubstituted phenylene group; and
Ar 203 is a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted diphenylfluorenyl group, a substituted or unsubstituted dimethylfluorenyl group, a substituted or unsubstituted benzodiphenylfluorenyl group, a substituted or unsubstituted benzodimethylfluorenyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothienyl group, a substituted or unsubstituted naphthobenzofuranyl group, or a substituted or unsubstituted naphthobenzothienyl group.
27 . The organic electroluminescence device according to claim 3 , wherein
L 201 and L 202 are each independently a single bond, or a group represented by one of formulae (2-1a) to (2-4a) below,
where, in the formulae (2-1a) to (2-4a):
Ra 1 to Re 1 are each independently selected from the group consisting of a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms;
R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in the second compound represented by the formula (2); and
*1 and *2 each represent a bonding position.
28 . The organic electroluminescence device according to claim 27 , wherein
Ra 1 to Re 1 are each a hydrogen atom, and
at least one of Ra 1 to Re 1 is a deuterium atom.
29 . The organic electroluminescence device according to claim 3 , wherein
R 201 to R 208 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a cyano group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.
30 . The organic electroluminescence device according to claim 8 , wherein
L 201 and L 202 are each independently a single bond, or a group represented by one of formulae (2-1a) to (2-4a) below,
where, in the formulae (2-1a) to (2-4a):
Ra 1 to Re 1 are each independently selected from the group consisting of a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms;
R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in the second compound represented by the formula (2); and
*1 and *2 each represent a bonding position.
31 . The organic electroluminescence device according to claim 30 , wherein
Ra 1 to Re 1 are each a hydrogen atom, and
at least one of Ra 1 to Re 1 is a deuterium atom.
32 . The organic electroluminescence device according to claim 8 , wherein
R 201 to R 208 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a cyano group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.
33 . The organic electroluminescence device according to claim 15 , wherein
L 201 and L 202 are each independently a single bond, or a group represented by one of formulae (2-1a) to (2-4a) below,
where, in the formulae (2-1a) to (2-4a):
Ra 1 to Re 1 are each independently selected from the group consisting of a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms;
R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in the second compound represented by the formula (2); and
*1 and *2 each represent a bonding position.
34 . The organic electroluminescence device according to claim 33 , wherein
Ra 1 to Re 1 are each a hydrogen atom, and
at least one of Ra 1 to Re 1 is a deuterium atom.
35 . The organic electroluminescence device according to claim 15 , wherein
R 201 to R 208 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a cyano group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.
36 . The organic electroluminescence device according to claim 17 , wherein
L 201 and L 202 are each independently a single bond, or a group represented by one of formulae (2-1a) to (2-4a) below,
where, in the formulae (2-1a) to (2-4a):
Ra 1 to Re 1 are each independently selected from the group consisting of a hydrogen atom, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a group represented by —O—(R 904 ), a group represented by —S—(R 905 ), a group represented by —N(R 906 )(R 907 ), an unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R 801 , a group represented by —COOR 802 , a halogen atom, a cyano group, a nitro group, and an unsubstituted aryl group having 6 to 50 ring carbon atoms;
R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 respectively represent the same as R 901 , R 902 , R 903 , R 904 , R 905 , R 906 , R 907 , R 801 and R 802 in the second compound represented by the formula (2); and
*1 and *2 each represent a bonding position.
37 . The organic electroluminescence device according to claim 36 , wherein
Ra 1 to Re 1 are each a hydrogen atom, and
at least one of Ra 1 to Re 1 is a deuterium atom.
38 . The organic electroluminescence device according to claim 17 , wherein
R 201 to R 208 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a group represented by —Si(R 901 )(R 902 )(R 903 ), a cyano group, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.
39 . The organic electroluminescence device according to claim 1 , wherein
the first emitting layer and the second emitting layer are in direct contact with each other.
40 . An organic electroluminescence device comprising:
an anode;
a cathode;
a first emitting layer provided between the anode and the cathode; and
a second emitting layer provided between the first emitting layer and the cathode, wherein
the second emitting layer comprises, as a second host material, a second compound represented by a formula (2) below, and
the second compound comprises at least one deuterium atom,
where, in the formula (2):
R 201 to R 208 are each a hydrogen atom;
at least one of R 201 to R 208 is a deuterium atom;
L 201 is a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 30 ring atoms;
L 202 is a single bond, or a divalent group derived by removing one hydrogen atom on an aryl ring of one of an unsubstituted phenyl group, an unsubstituted naphthyl group, and an unsubstituted phenanthryl group;
Ar 201 is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms;
Ar 202 is an unsubstituted phenyl group, an unsubstituted naphthyl group, or an unsubstituted phenanthryl group; and
each substituent for the substituted or unsubstituted group in the formula (2) is independently an unsubstituted alkyl group having 1 to 18 carbon atoms or an unsubstituted aryl group having 6 to 18 ring carbon atoms.
41 . The organic electroluminescence device according to claim 1 , wherein each of R 101 to R 110 not represented by the formula (11) is a hydrogen atom.