Organic light-emitting element and composition for organic material layer thereof

An organic light emitting device comprising:

• a first electrode;
• a second electrode and
• one or more organic material layers provided between the first electrode and the second electrode,
• wherein one or more layers of the organic material layers include Compound (A) represented by the following Chemical Formula 1 and Compound (B) represented by any one of the following Chemical Formulae 2 to 4:
• in Chemical Formula 1,
• X1 is O;
• S;
• or NR;
• R1 to R10 are each independently selected from the group consisting of hydrogen;
• deuterium;
• a halogen group;
• a cyano group;
• a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms;
• a substituted or unsubstituted alkenyl group having 2 to 60 carbon atoms;
• a substituted or unsubstituted alkynyl group having 2 to 60 carbon atoms;
• a substituted or unsubstituted alkoxy group having 1 to 60 carbon atoms;
• a substituted or unsubstituted cycloalkyl group having 3 to 60 carbon atoms;
• a substituted or unsubstituted heterocycloalkyl group having 2 to 60 carbon atoms;
• a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms;
• a substituted or unsubstituted phosphine oxide group;
• and a substituted or unsubstituted amine group, or adjacent two or more groups bond to form a substituted or unsubstituted ring;
• at least one of R1 to R10 is —N-Het, and at least one of the rest of R1 to R10 is -(L)m-Ar;
• L is a direct bond;
• a substituted or unsubstituted arylene group having 6 to 60 carbon atoms;
• or a substituted or unsubstituted heteroarylene group having 2 to 60 carbon atoms;
• Ar is a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms;
• or a substituted or unsubstituted amine group;
• N-Het is a monocyclic or polycyclic heteroaryl group having 2 to 60 carbon atoms substituted or unsubstituted, and including one or more Ns;
• R is a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• m is an integer of 1 to 5;
• and
• when m is an integer of 2 or greater, substituents in the parentheses are the same as or different from each other,
• in Chemical Formulae 2 to 4,
• X2 is O or S;
• X3 and X4 are each independently O;
• S;
• or CR′R″;
• L1 to L6 are each independently a direct bond;
• a substituted or unsubstituted arylene group having 6 to 60 carbon atoms;
• or a substituted or unsubstituted heteroarylene group having 2 to 60 carbon atoms;
• l1 to l6 are each independently an integer of 1 to 5;
• A1 to A4 are each independently a halogen group;
• a cyano group;
• a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms;
• a substituted or unsubstituted cycloalkyl group having 3 to 60 carbon atoms;
• a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms;
• or a substituted or unsubstituted amine group;
• A5 and A6 are each independently hydrogen;
• deuterium;
• a halogen group;
• a cyano group;
• a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms;
• a substituted or unsubstituted cycloalkyl group having 3 to 60 carbon atoms;
• a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• or a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms, or A5 and A6 bond to form a substituted or unsubstituted ring;
• R′, R″ and R31 are each independently hydrogen;
• deuterium;
• a halogen group;
• a cyano group;
• a substituted or unsubstituted alkyl group having 1 to 60 carbon atoms;
• a substituted or unsubstituted cycloalkyl group having 3 to 60 carbon atoms;
• a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• or a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms;
• Het is a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• or a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms;
• r31 is an integer of 1 to 4;
• and
• when l1 to l6 and r31 are each 2 or greater, substituents in the parentheses are the same as or different from each other.