Organic electroluminescent element and electronic appliance

An organic electroluminescence device, comprising:

• an anode;
• a cathode;
• and
• an emitting layer disposed between the anode and the cathode, wherein
• the emitting layer contains a host material, a sensitizing material, and a fluorescent material,
• the host material is a first compound including, in one molecule, at least one partial structure selected from the group consisting of partial structures represented by formulae (101) to (118) below,
• the sensitizing material is at least one compound selected from the group consisting of a phosphorescent metal complex and a delayed fluorescent compound,
• the fluorescent material is at least one compound selected from the group consisting of a third compound represented by a formula (41) below,
• the host material, the sensitizing material, and the fluorescent material are mutually different compounds, and
• an energy gap T77K(H1) at 77K of the host material and an energy gap T77K(G2) at 77K of the sensitizing material satisfy a relationship of a numerical formula (Numerical Formula 1) below,
• where, in the formula (101):
• A11 to A16 are each independently a nitrogen atom, CR11, or a carbon atom bonded to another atom or another structure in the molecule of the first compound;
• at least one of A11 to A16 is a carbon atom bonded to another atom or another structure in the molecule of the first compound, and
• when a plurality of R11 are present, the plurality of R11 are mutually the same or different, and at least one combination of adjacent two or more of the plurality of R11 are mutually bonded to form a substituted or unsubstituted monocyclic ring, mutually bonded to form a substituted or unsubstituted fused ring, or not mutually bonded;
• in the formula (102):
• A1 to A4 are each independently a nitrogen atom, CR12, or a carbon atom bonded to another atom or another structure in the molecule of the first compound;
• each R12 is independently a hydrogen atom or a substituent, or at least one combination of combinations of adjacent ones of R12 are mutually bonded to form a ring;
• when a plurality of R12 are present, the plurality of R12 are mutually the same or different, and at least one combination of adjacent two or more of the plurality of R12 are mutually bonded to form a substituted or unsubstituted monocyclic ring, mutually bonded to form a substituted or unsubstituted fused ring, or not mutually bonded;
• X10 is NR3, C(R14)(R15), Si(R16)(R17), an oxygen atom, a sulfur atom, a nitrogen atom bonded to another atom or another structure in the molecule of the first compound, a carbon atom bonded to R18 and to another atom or another structure in the molecule of the first compound, or a silicon atom bonded to R19 and to another atom or another structure in the molecule of the first compound;
• at least one of carbon atoms in A1 to A4, a nitrogen atom in X10, a carbon atom in X10, or a silicon atom in X10 is bonded to another atom or another structure in the molecule of the first compound;
• a combination of R14 and R15 are mutually bonded to form a substituted or unsubstituted monocyclic ring, mutually bonded to form a substituted or unsubstituted fused ring, or not mutually bonded;
• and
• a combination of R16 and R17 are mutually bonded to form a substituted or unsubstituted monocyclic ring, mutually bonded to form a substituted or unsubstituted fused ring, or not mutually bonded;
• in the formula (103):
• a combination of R115 and R116 are mutually bonded to form a substituted or unsubstituted monocyclic ring, mutually bonded to form a substituted or unsubstituted fused ring, or not mutually bonded;
• in the formulae (101) to (104):
• R11, R12, R14, R15, R16, R17, R115 and R116 forming neither the substituted or unsubstituted monocyclic ring nor the substituted or unsubstituted fused ring, and R13, R18, R19 and R117 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(R901)(R902)(R903), a group represented by —O—(R904), a group represented by —S—(R905), a group represented by —N(R906)(R907), a group represented by —C(═O)R908, a group represented by —COOR909, a group represented by —P(═O)(R910)(R911), a group represented by —P(═O)(OR912)(OR913), a group represented by —Ge(R914)(R915)(R916), a group represented by —B(R917)(R918), a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, 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 formulae (103) to (118):
• each * is a site bonded to another atom or another structure in the molecule of the first compound;
• and
• when the first compound includes a plurality of partial structures represented by the formula (101), a plurality of partial structures represented by the formula (102), a plurality of partial structures represented by the formula (103), and a plurality of partial structures represented by the formula (104), the plurality of partial structures represented by the formula (101) are mutually the same or different, the plurality of partial structures represented by the formula (102) are mutually the same or different, the plurality of partial structures represented by the formula (103) are mutually the same or different;
• and the plurality of partial structures represented by the formula (104) are mutually the same or different;
• in the first compound:
• R901 to R918 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 R901 are present, the plurality of R901 are mutually the same or different;
• when a plurality of R902 are present, the plurality of R902 are mutually the same or different;
• when a plurality of R903 are present, the plurality of R903 are mutually the same or different;
• when a plurality of R904 are present, the plurality of R904 are mutually the same or different;
• when a plurality of R905 are present, the plurality of R905 are mutually the same or different;
• when a plurality of R906 are present, the plurality of R906 are mutually the same or different;
• when a plurality of R907 are present, the plurality of R907 are mutually the same or different;
• when a plurality of R908 are present, the plurality of R908 are mutually the same or different;
• when a plurality of R909 are present, the plurality of R909 are mutually the same or different;
• when a plurality of R910 are present, the plurality of R910 are mutually the same or different;
• when a plurality of R911 are present, the plurality of R911 are mutually the same or different;
• when a plurality of R912 are present, the plurality of R912 are mutually the same or different;
• when a plurality of R913 are present, the plurality of R913 are mutually the same or different;
• when a plurality of R914 are present, the plurality of R914 are mutually the same or different;
• when a plurality of R915 are present, the plurality of R915 are mutually the same or different;
• when a plurality of R916 are present, the plurality of R916 are mutually the same or different;
• when a plurality of R917 are present, the plurality of R917 are mutually the same or different;
• and
• when a plurality of R918 are present, the plurality of R918 are mutually the same or different,
• in the formula (41):
• a ring a, a ring b, and a ring c are each independently a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocycle having 5 to 50 ring atoms;
• L401 and L402 are each independently O, S, Se, NR40, C(R41)(R42), or Si(R43)(R44);
• L403 is B, P, or P═O;
• R40 to R44 are each independently bonded with the ring a, the ring b, or the ring c to form a substituted or unsubstituted monocyclic ring, bonded with the ring a, the ring b, or the ring c to form a substituted or unsubstituted fused ring, or bonded neither with the ring a, the ring b, nor the ring c;
• R41 and R42 are mutually bonded to form a substituted or unsubstituted monocyclic ring, mutually bonded to form a substituted or unsubstituted fused ring, or not mutually bonded;
• R43 and R44 are mutually bonded to form a substituted or unsubstituted monocyclic ring, mutually bonded to form a substituted or unsubstituted fused ring, or not mutually bonded;
• R40 to R44 forming neither the substituted or unsubstituted monocyclic ring nor the substituted or unsubstituted fused ring are each independently a substituted or unsubstituted alkyl 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, an iminyl group represented by —CR45=N, 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;
• R45 is a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 60 ring atoms, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms;
• when a plurality of R40 are present, the plurality of R40 are mutually the same or different;
• when a plurality of R41 are present, the plurality of R41 are mutually the same or different;
• when a plurality of R42 are present, the plurality of R42 are mutually the same or different;
• when a plurality of R43 are present, the plurality of R43 are mutually the same or different;
• when a plurality of R44 are present, the plurality of R44 are mutually the same or different;
• and
• when a plurality of R45 are present, the plurality of R45 are mutually the same or different.