Organic Light Emitting Diode and Organic Light Emitting Device Having the Diode

An organic light emitting diode comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• an emissive layer disposed between the first and second electrodes and comprising at least one emitting material layer,
• wherein the at least one emitting material layer comprises a first compound and a second compound,
• wherein the first compound comprises an organometallic compound having the structure of Chemical Formula 1:
• Ir(LA)m(LB)n, [Chemical Formula 1]
• wherein:
• LA is a ligand having the structure of Chemical Formula 2:
• wherein:
• each of X1 to X4 is independently CR3 or N, wherein at least one of X1 to X4 is CR3;
• one of Y1 and Y2 is a single bond and another of Y1 and Y2 is CR4R5, NR4, O or S;
• each of R1 to R5 is independently chosen from hydrogen, halogen, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, an unsubstituted or substituted C1-C20 alkyl group, an unsubstituted or substituted C2-C20 alkenyl group, an unsubstituted or substituted C2-C20 alkynyl group, an unsubstituted or substituted C1-C20 alkoxy group, an unsubstituted or substituted C1-C20 alkyl amino group, an unsubstituted or substituted C1-C20 alkyl silyl group, an unsubstituted or substituted C4-C30 cycloalkyl group, an unsubstituted or substituted C3-C30 hetero cycloalkyl group, an unsubstituted or substituted C6-C30 aryl group, an unsubstituted or substituted C2-C30 hetero aryl group, an unsubstituted or substituted C7-C30 aralkyl group, an unsubstituted or substituted C3-C30 hetero aralkyl group, an unsubstituted or substituted C6-C30 aryloxy group, an unsubstituted or substituted C2-C30 hetero aryloxy group, an unsubstituted or substituted C6-C30 aryl amino group, an unsubstituted or substituted C2-C30 hetero aryl amino group, an unsubstituted or substituted C6-C30 aryl silyl group, and an unsubstituted or substituted C2-C30 hetero aryl silyl group, wherein each R1 is identical to or different from each other when a1 is 2, 3, or 4, wherein each R2 is identical to or different from each other when a2 is 2, and wherein each R3 is identical to or different from each other when a3 is 2, 3 or 4, or
• optionally,
• two adjacent R1 are further linked together to form an unsubstituted or substituted C4-C20 alicyclic ring, an unsubstituted or substituted C3-C20 hetero alicyclic ring, an unsubstituted or substituted C6-C20 aromatic ring or an unsubstituted or substituted C2-C20 hetero aromatic ring when a1 is 2, 3, or 4, and/or
• two adjacent R2 are further linked together to form an unsubstituted or substituted C4-C20 alicyclic ring, an unsubstituted or substituted C3-C20 hetero alicyclic ring, an unsubstituted or substituted C6-C20 aromatic ring or an unsubstituted or substituted C2-C20 hetero aromatic ring when a2 is 2,
• two adjacent R3 are further linked together to form an unsubstituted or substituted C4-C20 alicyclic ring, an unsubstituted or substituted C3-C20 hetero alicyclic ring, an unsubstituted or substituted C6-C20 aromatic ring or an unsubstituted or substituted C2-C20 hetero aromatic ring when a3 is 2, 3 or 4, and/or
• R4 and R5 are further linked together to form an unsubstituted or substituted C4-C20 alicyclic ring, an unsubstituted or substituted C3-C20 hetero alicyclic ring, an unsubstituted or substituted C6-C20 aromatic ring or an unsubstituted or substituted C2-C20 hetero aromatic ring;
• each of a1 and a3 is independently 0, 1, 2, 3, or 4;
• a2 is 0, 1, or 2,
• LB is an auxiliary ligand;
• m is 1, 2 or 3;
• n is 0, 1 or 2;
• and
• m+n is 3;
• and
• wherein the second compound includes an organic compound having the structure of Chemical Formula 8:
• wherein:
• each of R31 to R33 is independently chosen from hydrogen, halogen, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, an unsubstituted or substituted C1-C20 alkyl group, an unsubstituted or substituted C2-C20 alkenyl group, an unsubstituted or substituted C2-C20 alkynyl group, an unsubstituted or substituted C1-C20 alkoxy group, an unsubstituted or substituted C1-C20 alkyl amino group, an unsubstituted or substituted C1-C20 alkyl silyl group, an unsubstituted or substituted C4-C30 cycloalkyl group, an aryl group, an unsubstituted or substituted C2-C30 hetero aryl group, an unsubstituted or substituted C7-C30 aralkyl group, an unsubstituted or substituted C3-C30 hetero aralkyl group, an unsubstituted or substituted C6-C30 aryloxy group, an unsubstituted or substituted C2-C30 hetero aryloxy group, an unsubstituted or substituted C6-C30 aryl amino group, an unsubstituted or substituted C2-C30 hetero aryl amino group, an unsubstituted or substituted C6-C30 aryl silyl group, and an unsubstituted or substituted C2-C30 hetero aryl silyl group, wherein each R31 is identical to or different from each other when d is 2, 3, 4, 5, 6, 7, 8 or 9;
• each of L31 and L32 is independently a single bond, an unsubstituted or substituted C6-C30 arylene group or an unsubstituted or substituted C2-C30 hetero arylene group;
• and
• d is 0, 1, 2, 3, 4, 5, 6, 7, 8 or 9.