Organic light emitting diode comprising organometallic compound and various types of host materials

Abstract

An organic light emitting diode comprises a first electrode; a second electrode ; and an intermediate layer disposed between the first and second electrode, wherein the intermediate layer comprises an

Claims

1. An organic light emitting diode comprising:a first electrode;a second electrode facing the first electrode; andan intermediate layer disposed between the first electrode and the second electrode,wherein the intermediate layer comprises an emission material layer, and the emission material layer includes a dopant material and a host material,the dopant material comprises an organometallic compound represented by Chemical Formula 1 below, andthe host material comprises a mixture of a compound represented by Chemical Formula 4 below and a compound represented by Chemical Formula 5 below:<Chemical Formula 1>M(LA)m(LB)nin Chemical Formula 1,M is a central coordination metal and is one selected from the group consisting of molybdenum (Mo); tungsten (W) ; rhenium (Re) ; ruthenium (Ru) ; osmium (Os) ; rhodium (Rh) ; iridium (Ir) ; palladium (Pd); platinum (Pt); and gold (Au) ,La is a ligand represented by Chemical Formula 2,Lb is a bidentate ligand,m is 1, 2 or 3, n is 0, 1 or 2, and (m+n) is the oxidation number of the central coordination metal M,5 <Chemical Formula 2>in Chemical Formula 2,A has a ring structure selected from substituted or unsubstituted pyridine and substituted or unsubstituted pyrimidineRi to Rs are, each independently, at least one selected from the group consisting of hydrogen; deuterium; a substituted or unsubstituted C1-C20 linear alkyl group; a substituted or unsubstituted C3-C20 branched alkyl group; and a substituted or unsubstituted C4-C20 bicycloalkyl group, and optionally, Ri to Rs are partially or entirely deuterated,Rg is, each independently, at least one selected from the group consisting of hydrogen; deuterium; a substituted or unsubstituted C1-C20 linear alkyl group; a substituted or unsubstituted C3-C20 branched alkyl group; a C3-C20 cycloalkyl group; halogen; a nitrile group; a substituted or unsubstituted C1-C20 alkoxy group; and combinations thereof, and optionally, Rg is partially or entirely deuterated,when any one of Ri to Rg is substituted, a substituent of Ri to Rg is, each independently, at least one selected from the group consisting of deuterium; halogen; a C3-C10 cycloalkyl group; and combinations thereof, and when a plurality of substituents of Rito Rg are present, each substituent is the same as or differentfrom each other,Y is at least one selected from the group consisting of BRio; CR10R11; C=0; CNRio; SiRioRu; NRi0; PRio; AsRio; SbRio; P(O)Ri0; P(S)Ri0; P(Se)Rio,‘ As (0) Rio,’ As (S) Rio,’ As(Se)Rio,‘ Sb (0) Rio,’ Sb (S) Rio,’ Sb(Se)Rio,’ 0; S; Se; Te; SO; S02; SeO; SeO2; TeO; and TeO2,Xi to X4 are, each independently, at least one selected from CR22 and nitrogen (N) ,when any two of Xi to X4 that are adjacent to each other are CRi2, two Ri2 are not bonded, or are bonded to form a 5-membered or6-membered, substituted or heteroaromatic ring structure, are adjacent is CR22 and theunsubstituted aromatic ring orwhen one of any two of Xi to X4 thatother is nitrogen (N) , R22 is notbonded, or is bonded to the nitrogen to form a 5-membered or 6-membered heteroaromatic ring structure,and the aromatic ring orthe heteroaromatic ring structure formed where R22 is bonded is notsubstituted or substituted with at least one deuterium,Rio to Ri2 are, each independently, at least one selected from the group consisting of hydrogen; deuterium; halogen; a hydroxyl group; a nitro group; an amidino group; a hydrazine group; a hydrazone group; a substituted or unsubstituted C1-C20 linear alkyl group; a substituted or unsubstituted C3-C20 branched alkyl group; a substituted or unsubstituted C3-C20 cycloalkyl group; a substituted or unsubstituted C1-C20 heteroalkyl group; a substituted or unsubstituted C7-C20 arylalkyl group; a substituted or unsubstituted C2-C20 alkenyl group; a substituted or unsubstituted C3-C20 cycloalkenyl group; a substituted or unsubstituted C2-C20 heteroalkenyl group; a substituted or unsubstituted C2-C20 alkynyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30heteroaryl group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a silyl group; a C2-C30 acyl group; a carboxyl group; a nitrile group; an isonitrile group; a sulfanyl group; and a phosphino group,when any one of Rio to Rn is substituted, a substituent of Rio to Rn is, each independently, at least one selected from the group consisting of deuterium; halogen; and combinations thereof, and when a plurality of the substituents of Rio to R12 are present, each substituent is the same as or different from each other, andp is 2, andeach dotted line represents a connection position to the central coordination metal M,<Chemical Formula 4>in Chemical Formula 4,Ar is, each independently, a divalent group of an aromatic ring or a heteroaromatic ring selected from the group consisting of benzene; naphthalene; phenanthrene; fluorene; spirobifluorene; dibenzofuran; and dibenzothiophene,Ari and Ari are, each independently, a substituted or unsubstituted C6-C60 aryl group or a substituted or unsubstituted C2-C60 heteroaryl group,Rim to Rm are, each independently, at least one selected from the group consisting of deuterium; halogen; a hydroxyl group;a nitro group; an amidino group; a hydrazine group; a hydrazone group; a substituted or unsubstituted C1-C20 alkyl group; a substituted or unsubstituted C3-C20 cycloalkyl group; a substituted or unsubstituted C1-C20 heteroalkyl group; a substituted or unsubstituted C7-C20 arylalkyl group; a substituted or unsubstituted C2-C20 alkenyl group; a substituted or unsubstituted C3-C20 cycloalkenyl group; a substituted or unsubstituted C2-C20 heteroalkenyl group; a substituted or unsubstituted C2-C20 alkynyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a silyl group; a C2-C30 acyl group; a carboxyl group; a nitrile group; an isonitrile group; a sulfanyl group; and a phosphino group,o is an integer from 0 to 3, when o is an integer of 2 or 3, R21-1 is the same or different, and optionally, R21-1 is deuterated partially or entirely,s is an integer from 0 to 4, when s is an integer from 2 to 4, 5 R21-2 is the same or different, and optionally, R2W2 is deuterated partially or entirely,t is an integer from 0 to 4, when t is an integer from 2 to 4, R21-3 is the same or different, and optionally, R21-3 is deuterated partially or entirely,10 u is an integer from 0 to 4, when u is an integer from 2 to 4,R21-4 is the same or different, and optionally, R21-4 is deuterated partially or entirely,q is an integer from 0 to 2, andr is an integer of 0 or 1, anda linker L is at least one selected from the group consisting of a substituted or unsubstituted C6-C30 arylene group; a 78substituted or unsubstituted C2-C30 heteroarylene group; and asubstituted or unsubstituted C7-C20 arylalkylene group,<Chemical Formula 5>(^24)bin Chemical Formula 5,a B ring is a substituted or unsubstituted C6-C30 monocyclic or polycyclic aromatic fused ring,Xu and X12 are, each independently, N or CR?,Li is one selected from the group consisting of a single bond;a substituted or unsubstituted C6-C30 arylene group; a substituted or unsubstituted C2-C30 heteroarylene group; and a substituted or unsubstituted C3-C30 cycloalkylene group,Ar, is one selected from the group consisting of hydrogen; deuterium; halogen; a substituted or unsubstituted C1-C30 alkyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; and -L24-SiRkRiRm, in which L24 is a single bond, a substituted or unsubstituted C6-C30 arylene group, or a substituted or unsubstituted C2-C30 heteroarylene group, and Rk, Ri, and Rm are, each independently, hydrogen, a substituted or unsubstituted Cl-C30 alkyl group or a substituted or unsubstituted C6-C30 arylgroup,one or more of hydrogen of an alkyl group, an aryl group, aheteroaryl group, or a -L24-SiRkRiRm group, which is Ara, are unsubstituted or substituted with one or more of deuterium and halogen atom,Z is one selected from the group consisting of the following structures,W is one selected from the group consisting of 0; S; NR31; CR31R32; and S1R31R32,R22 to R32 and R' are, each independently, one selected from the group consisting of hydrogen; deuterium; halogen; a hydroxyl group; a nitro group; an amidino group; a hydrazine group; a hydrazone group; a substituted or unsubstituted C1-C20 alkyl group; a substituted or unsubstituted C3-C20 cycloalkyl group; a substituted or unsubstituted C1-C20 heteroalkyl group; a substituted or unsubstituted C7-C20 arylalkyl group; a substituted or unsubstituted C2-C20 alkenyl group; a substituted or unsubstituted C3-C20 cycloalkenyl group; a substituted or unsubstituted C2-C20 heteroalkenyl group; a substituted or unsubstituted C2-C20 alkynyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a silyl group; a C2-C30 acyl group; acarboxyl group; a nitrile group; an isonitrile group; a sulfanyl group; and a phosphino group, anda, c, e and 1 are, each independently, an integer of 1, 2, 3 or 4; b, d, g are, each independently, an integer of 1, 2 or 3; f is an integer of 1, 2, 3, 4, 5, or 6; and h is an integer of 1, 2, 3, 4, or 5.

2. The organic light emitting diode of claim 1, wherein Lb in Chemical Formula 1 is represented by a structure of at least one selected from the group consisting of Chemical Formula 3-1, and Chemical Formula 3-2 below:5 <Chemical Formula 3-l>in Chemical Formula 3-1, and Chemical Formula 3-2,Za to Zs are, each independently, one selected from the group consisting of hydrogen; deuterium; halogen; a hydroxyl group; a nitro group; an amidino group; a hydrazine group; a hydrazone group; a substituted or unsubstituted C1-C20 linear alkyl group; asubstituted or unsubstituted C3-C20 branched alkyl group; a substituted or unsubstituted C3-C20 cycloalkyl group; a substituted or unsubstituted C1-C20 heteroalkyl group; a substituted or unsubstituted C7-C20 arylalkyl group; a substituted or unsubstituted C2-C20 alkenyl group; a substituted or unsubstituted C3-C20 cycloalkenyl group; a substituted or unsubstituted C2-C20 heteroalkenyl group; a substituted or unsubstituted C2-C20 alkynyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a silyl group; an acyl group; a carboxyl group; a nitrile group; an isonitrile group; a sulfanyl group; and a phosphino group,Ze and Z? are, each independently, one selected from the group consisting of oxygen (0) and NRZ, and Rz is, each independently, one selected from the group consisting of hydrogen; a C1-C20 linear alkyl group; and a substituted or unsubstituted C3-C20 branched alkyl groups, andeach dotted line represents a connection position to the central coordination metal M.

3. The organic light emitting diode of claim 1 or 2, wherein the compound represented by Chemical Formula 1 is a compound represented by a structure of one selected from the group consisting of Chemical Formula 1-1-(1), Chemical Formula 1-1-(2), Chemical Formula 1-1-(3), Chemical Formula 1-1-(4), Chemical Formula 1-1-(5), and Chemical Formula 1-1-(6), the compound represented by Chemical Formula 1-2 is represented by a structure of one selected from the group consisting of Chemical Formula 1-2-(1) , Chemical Formula 1-2-(2), Chemical Formula 1-2-(3), Chemical 82Formula 1-2-(4), Chemical Formula 1-2-(5), and Chemical Formula 1-2-(6), and the compound represented by Chemical Formula 1-3 is represented by a structure of one selected from the group consisting of Chemical Formula 1-3-(1), Chemical Formula 1-3-(2), Chemical Formula 1-3-(3), Chemical Formula 1-3-(4), Chemical Formula 1-3-(5), and Chemical Formula 1-3-(6):<Chemical Formula 1 — 1— (1)><Chemical Formula 1-1-(2)><Chemical Formula 1-1-(3)><Chemical Formula 1-1-(4)><Chemical Formula 1-1-(5)><Chemical Formula 1-1-(6)><Chemical Formula 1-2-(1)><Chemical Formula 1-2-(2)><Chemical Formula 1-2-(3)><Chemical Formula 1-2-(4)><Chemical Formula 1-2-(5)><Chemical Formula 1-2-(6)><Chemical Formula 1 — 3— (1)><Chemical Formula 1-3-(2)><Chemical Formula 1-3-(3)><Chemical Formula 1 — 3— (4)><Chemical Formula 1-3-(5)><Chemical Formula 1-3-(6)>in Chemical Formula 1-1-(1), Chemical Formula 1-1-(2),Chemical Formula 1-1-(3), Chemical Formula 1-1-(4), ChemicalFormula 1-1-(5), Chemical Formula 1-1-(6), Chemical Formula 1-2-(1) , Chemical Formula 1-2-(2), Chemical Formula 1-2-(3), ChemicalFormula 1-2-(4), Chemical Formula 1-2-(5), Chemical Formula 1-2-(6), Chemical Formula 1-3-(1), Chemical Formula 1-3-(2), Chemical Formula 1-3-(3), Chemical Formula 1-3-(4), Chemical Formula 1-3-(5), and Chemical Formula 1-3-(6), andM, Xi to X:, Y, Ri to Rg, p, m, and n are the same as defined in Chemical Formula 1, andZ.3 to Z? are the same as defined in Chemical Formula 3-1 and Chemical Formula 3-2.

4. The organic light emitting diode of any preceding claim,wherein A in Chemical Formula 2 has a ring structure of pyridine.

5. The organic light emitting diode of any preceding claim,wherein M in Chemical Formula 1 is iridium (Ir).

6. The organic light emitting diode of any preceding claim,wherein Y in Chemical Formula 2 is any one of oxygen (0) , sulfur(S), and selenium (Se).J. The organic light emitting diode of any preceding claim,wherein at least one of Rg in Chemical Formula 2 excludes hydrogen.

8. The organic light emitting diode of any preceding claim, wherein Rio to R12 in Chemical Formula 2 are, each independently, at least one selected from the group consisting of hydrogen; deuterium; halogen; a nitrile group; a nitro group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a substituted or unsubstituted C1-C10 linear alkyl group; a substituted or unsubstituted C3-C10 branched alkyl group; and a substituted or unsubstituted C3-C10 cycloalkyl group.

9. The organic light emitting diode of any preceding claim, wherein the organometallic compound represented by Chemical Formula 1 is one selected from the group consisting of Compounds RD-1 to RD-20 below:RD1RD2RD4RD8RD7RD9RD10RD11RD12RD13RD14RD15RD16RD17RD19RD2010. The organic light emitting diode of any preceding claim, wherein Ari and Ar? in Chemical Formula 4 are, each independently, one monovalent group selected from the group consisting of substituted or unsubstituted benzene; substituted or unsubstituted biphenyl; substituted or unsubstituted naphthalene; substituted or unsubstituted phenanthrene; substituted or unsubstituted fluorene; substituted or unsubstituted dibenzofuran; substituted or unsubstituted dibenzothiophene; and substituted or unsubstituted spirobifluorene, and at least one hydrogen in any one of Ari and Ar? is unsubstituted or substituted with at least one selected from the group consisting of deuterium; halogen atom; a C1-C10 alkyl group; a C6-C20 aryl group; a C2-C20 heteroaryl group; a nitrile group; a silyl group; and combinations thereof.

11. The organic light emitting diode of any preceding claim, wherein the compound represented by Chemical Formula 4 is one selected from the group consisting of Compounds RHH-1 to RHH-20 below:RHH1RHH2RHH3RHH4RHH5RHH6RHH17RHH19RHH2012. The organic light emitting diode of any preceding claim,wherein Xu and X12 in Chemical Formula 5 are N.

13. The organic light emitting diode of any preceding claim, wherein the compound represented by Chemical Formula 5 is one selected from the group consisting of Compounds REH-1 to REH-20 below:REH1REH3REH4REH5REH6REH7REH12REH15REH17REH1414. The organic light emitting diode of any preceding claim, wherein the intermediate layer further comprises any one or more among a hole injection layer, a hole transport layer, a hole transport auxiliary layer, an electron blocking layer, an electron transport layer, and an electron injection layer.

15. An organic light emitting diode comprising:a first electrode;a second electrode facing the first electrode; andone or more light emitting parts positioned between the first electrode and the second electrode,wherein at least one of the light emitting parts comprises a red phosphorescent layer,the red phosphorescent layer comprises a dopant material and a host material,the dopant material comprises an organometallic compound represented by Chemical Formula 1 below, andthe host material comprises a compound represented by Chemical Formula 4 below and a compound represented by Chemical Formula 5 below:M(LA)m(LB)in Chemical Formula 1,M is a central coordination metal and is one selected from the group consisting of molybdenum (Mo); tungsten (W) ; rhenium (Re) ; ruthenium (Ru) ; osmium (Os) ; rhodium (Rh) ; iridium (Ir) ; palladium (Pd); platinum (Pt); and gold (Au) ,La is a ligand represented by Chemical Formula 2,Lb is a bidentate ligand,m is 1, 2 or 3, n is 0, 1 or 2, and (m+n) is the oxidation number of the central coordination metal M,5 <Chemical Formula 2>in Chemical Formula 2,A has a ring structure selected from substituted or unsubstituted pyridine and substituted or unsubstituted pyrimidine,Ri to Rs are, each independently, at least one selected from the group consisting of hydrogen; deuterium; a substituted or unsubstituted C1-C20 linear alkyl group; a substituted or unsubstituted C3-C20 branched alkyl group; and a substituted or unsubstituted C4-C20 bicycloalkyl group, and optionally, Ri to Rs are partially or entirely deuterated,Rg is, each independently, at least one selected from the group consisting of hydrogen; deuterium; a substituted or unsubstituted C1-C20 linear alkyl group; a substituted or unsubstituted C3-C20 branched alkyl group; a C3-C20 cycloalkyl group; halogen; a nitrile group; a substituted or unsubstituted C1-C20 alkoxy group; and combinations thereof, and optionally, Rg is partially or entirely deuterated,when any one of Ri to Rg is substituted, a substituent of Ri to Rg is, each independently, at least one selected from the group consisting of deuterium; halogen; a C3-C10 cycloalkyl group; and combinations thereof, and when a plurality of substituents of Ri to Rg are present, each substituent is the same as or different from each other,Y is at least one selected from the group consisting of BRio; CRioRu; C=0; CNRio; SiRioRu; NRi0; PRi0; AsRio; SbRio; P(O)Ri0; P(S)Ri0; P(Se)Ri0; As (0) Rio; As(S)Ri0; As(Se)Ri0; Sb(O)Ri0; Sb(S)Ri0; Sb(Se)Ri0; 0; S; Se; Te; SO; S02; SeO; SeO2; TeO; and TeO2,Xi to X2 are, each independently, at least one selected from CR22 and nitrogen (N) ,when any two of Xi to X4 that are adjacent to each other are CR22, two R22 are not bonded, or are bonded to form a 5-membered or 6-membered, substituted or unsubstituted aromatic ring or heteroaromatic ring structure, when one of any two of Xi to X4 that are adjacent is CRn and the other is nitrogen (N) , R22 is not bonded, or is bonded to the nitrogen to form a 5-membered or 6-membered heteroaromatic ring structure, and the aromatic ring or the heteroaromatic ring structure formed where R22 is bonded is not substituted or substituted with at least one deuterium,Rio to Ri2 are, each independently, at least one selected from the group consisting of hydrogen; deuterium; halogen; a hydroxyl 104group; a nitro group; an amidino group; a hydrazine group; a hydrazone group; a substituted or unsubstituted C1-C20 linear alkyl group; a substituted or unsubstituted C3-C20 branched alkyl group; a substituted or unsubstituted C3-C20 cycloalkyl group; a substituted or unsubstituted C1-C20 heteroalkyl group; a substituted or unsubstituted C7-C20 arylalkyl group; a substituted or unsubstituted C2-C20 alkenyl group; a substituted or unsubstituted C3-C20 cycloalkenyl group; a substituted or unsubstituted C2-C20 heteroalkenyl group; a substituted or unsubstituted C2-C20 alkynyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a silyl group; a C2-C30 acyl group; a carboxyl group; a nitrile group; an isonitrile group; a sulfanyl group; and a phosphino group,when any one of Rio to Rn is substituted, a substituent of Rio to Rn is, each independently, at least one selected from the group consisting of deuterium; halogen; and combinations thereof, and when a plurality of the substituents of Rio to Ru are present, each substituent is the same as or different from each other, and p is 2, and each dotted line represents a connection position to the central coordination metal M,<Chemical Formula 4>in Chemical Formula 4,Ar is, each independently, a divalent group of an aromatic ring or a heteroaromatic ring selected from the group consisting of benzene; naphthalene; phenanthrene; fluorene; spirobifluorene; dibenzofuran; and dibenzothiophene,Ari and Ar; are, each independently, a substituted or unsubstituted C6-C60 aryl group or a substituted or unsubstituted C2-C60 heteroaryl group,R21-1 to R21-4 are, each independently, at least one selected from the group consisting of deuterium; halogen; a hydroxyl group; a nitro group; an amidino group; a hydrazine group; a hydrazone group; a substituted or unsubstituted C1-C20 alkyl group; a substituted or unsubstituted C3-C20 cycloalkyl group; a substituted or unsubstituted C1-C20 heteroalkyl group; a substituted or unsubstituted C7-C20 arylalkyl group; a substituted or unsubstituted C2-C20 alkenyl group; a substituted or unsubstituted C3-C20 cycloalkenyl group; a substituted or unsubstituted C2-C20 heteroalkenyl group; a substituted or unsubstituted C2-C20 alkynyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a silyl group; a C2-C30 acyl group; acarboxyl group; a nitrile group; an isonitrile group; a sulfanyl group; and a phosphino group,o is an integer from 0 to 3, when o is an integer of 2 or 3, Rem is the same or different, and optionally, R21U is deuterated partially or entirely,s is an integer from 0 to 4, when s is an integer from 2 to 4, 5 R21-2 is the same or different, and optionally, R21-2 is deuterated partially or entirely,t is an integer from 0 to 4, when t is an integer from 2 to 4, R21-3 is the same or different, and optionally, R2U3 is deuterated partially or entirely,10 u is an integer from 0 to 4, when u is an integer from 2 to 4,R21-4 is the same or different, and optionally, R21-4 is deuterated partially or entirely,q is an integer from 0 to 2, andr is an integer of 0 or 1, anda linker L is at least one selected from the group consisting of a substituted or unsubstituted C6-C30 arylene group; a substituted or unsubstituted C2-C30 heteroarylene group; and a substituted or unsubstituted C7-C20 arylalkylene group,<Chemical Formula 5>(R24)bin Chemical Formula 5,a B ring is a substituted or unsubstituted C6-C30 monocyclic or polycyclic aromatic fused ring,Xu and X12 are, each independently, N or CR',Li is one selected from the group consisting of a single bond; a substituted or unsubstituted C6-C30 arylene group; a substituted or unsubstituted C2-C30 heteroarylene group; and a substituted or unsubstituted C3-C30 cycloalkylene group,Ar 3 is one selected from the group consisting of hydrogen; deuterium; halogen; a substituted or unsubstituted C1-C30 alkyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; and -L24-SiRkRiRm, in which L24 is a single bond, a substituted or unsubstituted C6-C30 arylene group, or a substituted or unsubstituted C2-C30 heteroarylene group, and Rk, Ri, and Rm are, each independently, hydrogen, a substituted or unsubstituted Cl-C30 alkyl group or a substituted or unsubstituted C6-C30 aryl group,one or more of hydrogen of an alkyl group, an aryl group, a heteroaryl group, or a -L24-SiRkRiRm group, which is Ar,, are unsubstituted or substituted with one or more of deuterium and halogen atom,Z is one selected from the group consisting of the following structures,XR-26 )eW is one selected from the group consisting of 0; S; NR31; CR31R32; and SiR3iR32,R22 to R32 and R' are, each independently, one selected from the group consisting of hydrogen; deuterium; halogen; a hydroxyl group; a nitro group; an amidino group; a hydrazine group; a hydrazone group; a substituted or unsubstituted C1-C20 alkyl group; a substituted or unsubstituted C3-C20 cycloalkyl group; a substituted or unsubstituted C1-C20 heteroalkyl group; a substituted or unsubstituted C7-C20 arylalkyl group; a substituted or unsubstituted C2-C20 alkenyl group; a substituted or unsubstituted C3-C20 cycloalkenyl group; a substituted or unsubstituted C2-C20 heteroalkenyl group; a substituted or unsubstituted C2-C20 alkynyl group; a substituted or unsubstituted C6-C30 aryl group; a substituted or unsubstituted C2-C30 heteroaryl group; a substituted or unsubstituted C1-C20 alkoxy group; an amino group; a silyl group; a C2-C30 acyl group; a carboxyl group; a nitrile group; an isonitrile group; a sulfanyl group; and a phosphino group, anda, c, e and i are, each independently, an integer of 1, 2, 3 or 4; b, d, g are, each independently, an integer of 1, 2 or 3; f is an integer of 1, 2, 3, 4, 5, or 6; and h is an integer of 1, 2, 3, 4, or 5.

16. The organic light emitting diode of claim 15, wherein the organometallic compound represented by Chemical Formula 1 is one selected from the group consisting of Compounds RD-1 to RD-20 below:RD1RD2RD3RD4RD5RD6RD8RD7RD9RD10RD11RD12RD15RD14RD1617. The organic light emitting diode of claim 15 or 16, wherein the compound represented by Chemical Formula 4 is one selected from the group consisting of Compounds RHH-1 to RHH-20 below:RHH2RHH4RHH6RHH17RHH19RHH2018. The organic light emitting diode of any of claims 15 to17, wherein the compound represented by Chemical Formula 5 is one selected from the group consisting of Compounds REH-1 to REH-20 below:REH1REH3REH4REH5REH6REH7REH12REH14"If "TVREH1919. The organic light emitting diode of any of claims 15 to 18, wherein a plurality of light emitting parts are present between the first electrode and the second electrode, andthe plurality of light emitting parts have a structure connected by charge generation layers disposed between the plurality of light emitting parts.

20. An organic light emitting diode display device comprising: a substrate;a driving element positioned on the substrate; andthe organic light emitting diode according to any one of claims 1 to 19, which is positioned on the substrate and connected to the driving element.123

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