Organic light emitting diode comprising organometallic compound and plurality of host materials

An organic light-emitting diode comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• a first light-emitting stack and a second light-emitting stack disposed between the first electrode and the second electrode,
• wherein each of the first light-emitting stack and the second light-emitting stack includes at least one light-emitting layer,
• wherein the at least one light-emitting layer is a red phosphorescent light-emitting layer,
• wherein the red phosphorescent light-emitting layer includes a dopant material and a host material,
• wherein the dopant material includes an organometallic compound represented by a following Chemical Formula 1,
• wherein the host material includes a mixture of a compound represented by a following Chemical Formula 2 and a compound represented by a following Chemical Formula 3:
• wherein in the Chemical Formula 1,
• M represents a central coordination metal, and includes one selected from a group consisting of molybdenum (Mo), tungsten (W), rhenium (Re), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), palladium (Pd), platinum (Pt) and gold (Au),
• R represents a structure connected to X1 and X2 to form a fused ring, and X1 and X2 each independently represents C,
• each of R1 and R2 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C7 to C20 arylalkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heteroalkenyl group, a substituted or unsubstituted C2 to C20 alkynyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, an amino group, a silyl group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, and a phosphino group, and R1 and R2 together optionally form a C5-C6 carbon ring, a C3-C6 heterocyclic ring or C7-C10 arylalkyl group,
• Y represents one selected from a group consisting of BR3, CR3R4, C═O, CNR3, SiR3R4, NR3, PR3, AsR3, SbR3, P(O)R3, P(S)R3, P(Se)R3, As(O)R3, As(S)R3, As(Se)R3, Sb(O)R3, Sb(S)R3, Sb(Se)R3, O, S, Se, Te, SO, SO2, SeO, SeO2, TeO and TeO2,
• each of R3 and R4 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C7 to C20 arylalkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heteroalkenyl group, a substituted or unsubstituted C2 to C20 alkynyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, an amino group, a silyl group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, and a phosphino group,
• each of X3 to X6 independently represents one selected from CR5 and nitrogen (N),
• adjacent substituents among X3 to X6 may be fused with each other to form a ring, wherein the ring may be a C5 to C6 carbon ring or a C3-C6 heterocyclic ring,
• each of X7 to X10 independently represents one selected from CR6 and nitrogen (N),
• each of R5 and R6 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C7 to C20 arylalkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heteroalkenyl group, a substituted or unsubstituted C2 to C20 alkynyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, an amino group, a silyl group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, and a phosphino group,
• represents a bidentate ligand,
• m is an integer of 1, 2 or 3, n is an integer of 0, 1 or 2, and m+n is an oxidation number of the metal (M),
• wherein in the Chemical Formula 2,
• each of Y1 and Y2 independently represents one selected from a group consisting of N, O and S, wherein one of Y1 and Y2 is N,
• R7 represents a substituted or unsubstituted C6 to C30 aryl group or a substituted or unsubstituted C3 to C30 heteroaryl group,
• each of R8 to R12 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a cyano group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C1 to C30 silyl group and a substituted or unsubstituted C3 to C30 amino group, wherein substituents adjacent to each other of R8 to R12 is fused with each other to form a ring,
• L1 represents one selected from a group consisting of a single bond, a substituted or unsubstituted C6 to C30 arylene group, and a substituted or unsubstituted C3 to C30 heteroarylene group,
• each of o and p is an integer of 1 or 2, and q is an integer of 1, 2, 3 or 4,
• wherein in the Chemical Formula 3,
• Ar1 represents one selected from a group consisting of a C6 to C30 aryl group unsubstituted or substituted with a substituent B, and a C3 to C30 heteroaryl group substituted or unsubstituted with the substituent B,
• the substituent B may bind to Ar1 at at least one substitution site, wherein the substituent B may be at least one selected from deuterium, halogen, C1 to C10 alkyl group, phenyl group, biphenyl group, and naphthyl group,
• L2 represents one selected from a group consisting of phenylene group and naphthylene group, and s is an integer of 0 or 1,
• Ar2 is a C3 to C10 heterocyclic group containing nitrogen as a heteroatom,
• each of Ar3 and Ar4 independently represents one of a substituted or unsubstituted C6 to C30 aryl group and a substituted or unsubstituted C3 to C30 heteroaryl group.

An organic light-emitting diode comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• a first light-emitting stack, a second light-emitting stack, and a third light-emitting stack disposed between the first electrode and the second electrode,
• wherein each of the first light-emitting stack, the second light-emitting stack, and the third light-emitting stack includes at least one light-emitting layer,
• wherein the at least one light-emitting layer is a red phosphorescent light-emitting layer,
• wherein the red phosphorescent light-emitting layer includes a dopant material and a host material,
• wherein the dopant material includes an organometallic compound represented by a following Chemical Formula 1,
• wherein the host material includes a mixture of a compound represented by a following Chemical Formula 2 and a compound represented by a following Chemical Formula 3:
• wherein in the Chemical Formula 1,
• M represents a central coordination metal, and includes one selected from a group consisting of molybdenum (Mo), tungsten (W), rhenium (Re), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), palladium (Pd), platinum (Pt) and gold (Au),
• R represents a structure connected to X1 and X2 to form a fused ring, and X1 and X2 each independently represents C,
• each of R1 and R2 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C7 to C20 arylalkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heteroalkenyl group, a substituted or unsubstituted C2 to C20 alkynyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, an amino group, a silyl group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, and a phosphino group, and R1 and R2 together optionally form a C5-C6 carbon ring, a C3-C6 heterocyclic ring or C7-C10 arylalkyl group,
• Y represents one selected from a group consisting of BR3, CR3R4, C═O, CNR3, SiR3R4, NR3, PR3, AsR3, SbR3, P(O)R3, P(S)R3, P(Se)R3, As(O)R3, As(S)R3, As(Se)R3, Sb(O)R3, Sb(S)R3, Sb(Se)R3, O, S, Se, Te, SO, SO2, SeO, SeO2, TeO and TeO2,
• each of R3 and R4 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C7 to C20 arylalkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heteroalkenyl group, a substituted or unsubstituted C2 to C20 alkynyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, an amino group, a silyl group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, and a phosphino group,
• each of X3 to X6 independently represents one selected from CR5 and nitrogen (N),
• adjacent substituents among X3 to X6 may be fused with each other to form a ring, wherein the ring may be a C5 to C6 carbon ring or a C3-C6 heterocyclic ring,
• each of X7 to X10 independently represents one selected from CR6 and nitrogen (N),
• each of R5 and R6 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C7 to C20 arylalkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heteroalkenyl group, a substituted or unsubstituted C2 to C20 alkynyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C1 to C20 alkoxy group, an amino group, a silyl group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, and a phosphino group,
• represents a bidentate ligand,
• m is an integer of 1, 2 or 3, n is an integer of 0, 1 or 2, and m+n is an oxidation number of the metal (M),
• wherein in the Chemical Formula 2,
• each of Y1 and Y2 independently represents one selected from a group consisting of N, O and S, wherein one of Y1 and Y2 is N,
• R7 represents a substituted or unsubstituted C6 to C30 aryl group or a substituted or unsubstituted C3 to C30 heteroaryl group,
• each of R8 to R12 independently represents one selected from a group consisting of hydrogen, deuterium, halogen, a cyano group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C1 to C30 silyl group and a substituted or unsubstituted C3 to C30 amino group, wherein substituents adjacent to each other of R5 to R12 is fused with each other to form a ring,
• L1 represents one selected from a group consisting of a single bond, a substituted or unsubstituted C6 to C30 arylene group, and a substituted or unsubstituted C3 to C30 heteroarylene group,
• each of o and p is an integer of 1 or 2, and q is an integer of 1, 2, 3 or 4,
• wherein in the Chemical Formula 3,
• Ar1 represents one selected from a group consisting of a C6 to C30 aryl group unsubstituted or substituted with a substituent B, and a C3 to C30 heteroaryl group substituted or unsubstituted with the substituent B,
• the substituent B may bind to Ar1 at at least one substitution site, wherein the substituent B may be at least one selected from deuterium, halogen, C1 to C10 alkyl group, phenyl group, biphenyl group, and naphthyl group,
• L2 represents one selected from a group consisting of phenylene group and naphthylene group, and s is an integer of 0 or 1,
• Ar2 is a C3 to C10 heterocyclic group containing nitrogen as a heteroatom,
• each of Ar3 and Ar4 independently represents one of a substituted or unsubstituted C6 to C30 aryl group and a substituted or unsubstituted C3 to C30 heteroaryl group.