Organic electroluminescent element and electronic device

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 first emitting layer comprises a first host material in a form of a first compound represented by a formula (101) below,
• the second emitting layer comprises a second host material in a form of a second compound,
• where, in the formula (101):
• R101 to R110 and R111 to R120 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 substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a group represented by —C(═O)R801, a group represented by —COOR802, 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;
• one of R101 to R110 represents a bonding position to L101, and one of R111 to R120 represents a bonding position to L101;
• L101 is a single bond, a substituted or unsubstituted arylene group having 6 to 24 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 24 ring atoms;
• mx is 1, 2, 3, 4, or 5;
• and
• when two or more L101 are present, the two or more L101 are mutually the same or different, and
• in the first compound represented by the formula (101):
• R901, R902, R903, R904, R905, R801 and R802 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 R801 are present, the plurality of R801 are mutually the same or different;
• and
• when a plurality of R802 are present, the plurality of R802 are mutually the same or different, and
• wherein an electron mobility μH1 of the first compound and an electron mobility μH2 of the second compound satisfy a relationship of a numerical formula (Numerical Formula 3) below,
• μH2>μH1 (Numerical Formula 3).