Organic electroluminescence device and electronic apparatus equipped with the same

An organic electroluminescence device comprising:

• a cathode,
• an anode, and
• an organic layer disposed between the cathode and the anode, wherein
• the organic layer comprises an emitting layer and a first layer,
• the first layer is disposed between the cathode and the emitting layer,
• the emitting layer comprises one or both of a compound represented by the following formula (1A) and a compound represented by the following formula (1B), and
• the first layer comprises a compound represented by the following formula (BE1):
• wherein in the formulas (1A) and (1B),
• X1 is an oxygen atom or a sulfur atom;
• Ar1 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;
• L1 is 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;
• R1 to R3, R11A to R19A, and R11B to R19B are independently
• a hydrogen atom, a halogen atom, a cyano group, a nitro group,
• 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(R901)(R902)(R903),
• —O—(R904),
• —S—(R905),
• —N(R906)(R907),
• 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;
• R901 to R907 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;
• and
• when two or more of each of R901 to R907 are present, the two or more of each of R901 to R907 are the same or different;
• wherein in the formula (BE1),
• two or more of X31 to X33 are nitrogen atoms, and the rest that is not a nitrogen atom is CR;
• R is
• a hydrogen atom,
• a cyano group,
• 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,
• —Si(R901)(R902)(R903),
• —O—(R904),
• 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;
• R901 to R904 are as defined in the formulas (1A) and (1B);
• when a plurality of R's is present, the plurality of R's may be the same as or different from each other;
• AE 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;
• BE 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;
• LE is a single bond, a substituted or unsubstituted (nE+1)-valent aromatic hydrocarbon ring group including 6 to 50 ring carbon atoms, or a substituted or unsubstituted (nE+1)-valent heterocyclic group including 5 to 50 ring atoms;
• the aromatic hydrocarbon ring group may have a structure in which two or more different aromatic hydrocarbon rings are bonded with each other;
• CE'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;
• nE is an integer of 1 to 3;
• and when nE is 2 or more, LE is not a single bond.