Organic electroluminescent element and electronic device using 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 a compound represented by the following formula (1-1) or the following formula (1-2), and
• a compound A having a Stokes shift of 20 nm or smaller and an emission peak wavelength of 440 nm to 465 nm
• wherein in the formula (1-1) or (1-2),
• one or more sets of adjacent two or more of R1 to R8 form a substituted or unsubstituted, saturated or unsaturated ring by bonding with each other, or do not form a substituted or unsubstituted, saturated or unsaturated ring;
• R1 to R8 that do not form the substituted or unsubstituted, saturated or unsaturated ring are independently a hydrogen atom or a substituent R;
• the substituent R is
• 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;
• 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 as or different from each other;
• L1 and L2 are independently
• 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;
• X1 is O;
• one or more sets of adjacent two or more of R11 to R14 and adjacent two or more of R15 to R20 form a substituted or unsubstituted, saturated or unsaturated ring by bonding with each other, or do not form a substituted or unsaturated, saturated or unsaturated ring;
• R11 to R20 that do not form the substituted or unsubstituted, saturated or unsaturated ring are independently a hydrogen atom or a substituent R;
• the substituent R is as defined in the formula (1-1) or (1-2);
• Ar2 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.