Light-emitting device, electronic apparatus including the same, and organometallic compound

A light-emitting device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• an interlayer between the first electrode and the second electrode and comprising an emission layer,
• wherein the emission layer comprises an organometallic compound represented by Formula 1:
• wherein, in Formula 1, M is platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), silver (Ag), or copper (Cu),
• in Formula 1, X1 to X4 are each independently C or N,
• in Formula 1, i) a bond between X1 and M is a coordinate bond, and ii) one bond selected from a bond between X2 and M, a bond between X3 and M, and a bond between X4 and M is a coordinate bond, and the remaining two bonds are covalent bonds,
• in Formula 1, ring CY1 is i) an X1-containing 5-membered ring, ii) an X1-containing 5-membered ring condensed with at least one 6-membered ring, or iii) an X1-containing 6-membered ring,
• in Formula 1, ring CY2 is a C3-C60 carbocyclic group or a C1-C60 heterocyclic group,
• in Formula 1, X31 to X36 and X41 to X44 are each independently C or N,
• in Formula 1, X51 is *—N(R5)—*′, *—B(R5)—*′, *—P(R5)—*′, *—C(R5a)(R5b)—*′, *—Si(R5a)(R5b)—*′, *—Ge(R5a)(R5b)*′, *—S*′, *—Se—*′, *—O—*′, *—C(═O)—*′, *—S(═O)—*′*—S(═O)2—*′*—C(R5)=*′, *═C(R5)—*′, *—C(R5a)═C(R5b)—*′, *—C(═S)—*′, or *—≡C*′, wherein * and *′ each indicate a binding site to a neighboring atom,
• in Formula 1, L1 is a single bond, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, or a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a,
• in Formula 1, b1 is an integer in a range from 1 to 5,
• in Formula 1, R1 to R5, R5a, and R5b are each independently a group represented by Formula 1-1, a group represented by Formula 1-2, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkenyl group unsubstituted or substituted with at least one R10a, a C2-C60 alkynyl group unsubstituted or substituted with at least one R10a, a C1-C60 alkoxy group unsubstituted or substituted with at least one R10a, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a, a C6-C60 aryloxy group unsubstituted or substituted with at least one R10a, a C6-C60 arylthio group unsubstituted or substituted with at least one R10a, —C(Q1)(Q2)(Q3), —Si(Q1)(Q2)(Q3), —N(Q1)(Q2), —B(Q1)(Q2), —C(═O)(Q1), —S(═O)2(Q1), or —P(═O)(Q1)(Q2),
• in Formula 1, c1 is an integer in a range from 0 to 5, a1 and a4 are each independently an integer in a range from 0 to 4, a2 is an integer in a range from 0 to 10, a3 is an integer in a range from 0 to 6, the sum of a1 to a4 is 1 or more, at least one of a group(s) represented by *-(L1)b1-(R1)c1 in the number of a1, at least one of R2(s) in the number of a2, at least one of R3(s) in the number of a3, at least one of R4(s) in the number of a4, or any combination thereof is each independently a group represented by Formula 1-1 or a group represented by Formula 1-2,
• in Formulae 1-1 and 1-2, L7 is a single bond, a C3-C60 carbocyclic group unsubstituted or substituted with at least one R10a, or a C1-C60 heterocyclic group unsubstituted or substituted with at least one R10a,
• in Formulae 1-1 and 1-2, b7 is an integer in a range from 1 to 5,
• in Formulae 1-1 and 1-2, ring CY7 is a C3-C60 carbocyclic group or a C1-C60 heterocyclic group,
• in Formulae 1-1 and 1-2, n7 is an integer in a range from 1 to 5,
• in Formula 1-1, ring CY8 is a non-aromatic C3-C60 carbocyclic group or a non-aromatic C1-C60 heterocyclic group,
• in Formulae 1-1 and 1-2, R7 to R9 are each the same as described in connection with R1,
• in Formulae 1-1 and 1-2, a7 and a8 are each independently an integer in a range from 0 to 20,
• two or more selected from a group(s) represented by *-(L1)b1-(R1)c1 in the number of a1 are optionally linked together to form a C3-C60 carbocyclic group that is unsubstituted or substituted with at least one R10a or a C1-C60 heterocyclic group that is unsubstituted or substituted with at least one R10a,
• two or more selected from R2(s) in the number of a2 are optionally linked together to form a C3-C60 carbocyclic group that is unsubstituted or substituted with at least one R10a or a C1-C60 heterocyclic group that is unsubstituted or substituted with at least one R10a,
• two or more selected from R3(s) in the number of a3 are optionally linked together to form a C3-C60 carbocyclic group that is unsubstituted or substituted with at least one R10a or a C1-C60 heterocyclic group that is unsubstituted or substituted with at least one R10a,
• two or more selected from R4(s) in the number of a4 are optionally linked together to form a C3-C60 carbocyclic group that is unsubstituted or substituted with at least one R10a or a C1-C60 heterocyclic group that is unsubstituted or substituted with at least one R10a,
• two or more selected from R1 to R5, R5a, and R5b are optionally linked together to form a C3-C60 carbocyclic group that is unsubstituted or substituted with at least one R10a or a C1-C60 heterocyclic group that is unsubstituted or substituted with at least one R10a,
• R10a is:
• deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group;
• a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, or a C1-C60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C3-C60 carbocyclic group, a C1-C60 heterocyclic group, a C6-C60 aryloxy group, a C6-C60 arylthio group, —Si(Q11)(Q12)(Q13), —N(Q11)(Q12), —B(Q11)(Q12), —C(═O)(Q11), —S(═O)2(Q11), —P(═O)(Q11)(Q12), or any combination thereof;
• a C3-C60 carbocyclic group, a C1-C60 heterocyclic group, a C6-C60 aryloxy group, or a C6-C60 arylthio group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C60 carbocyclic group, a C1-C60 heterocyclic group, a C6-C60 aryloxy group, a C6-C60 arylthio group, —Si(Q21)(Q22)(Q23), —N(Q21)(Q22), —B(Q21)(Q22), —C(═O)(Q21), —S(═O)2(Q21), —P(═O)(Q21)(Q22), or any combination thereof;
• or
• —Si(Q31)(Q32)(Q33), —N(Q31)(Q32), —B(Q31)(Q32), —C(═O)(Q31), —S(═O)2(Q31), or —P(═O)(Q31)(Q32), and
• Q1 to Q3, Q11 to Q13, Q21 to Q23, and Q31 to Q33 are each independently:
• hydrogen;
• deuterium;
• —F;
• —Cl;
• —Br;
• —I;
• a hydroxyl group;
• a cyano group;
• a nitro group;
• a C1-C6 alkyl group unsubstituted or substituted with deuterium, —F, a cyano group, a C1-C60 alkyl group, a C1-C60 alkoxy group, a phenyl group, a biphenyl group, a pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a pyrazinyl group, a triazinyl group, or any combination thereof;
• a C2-C60 alkenyl group;
• a C2-C60 alkynyl group;
• a C1-C60 alkoxy group;
• or a C3-C60 carbocyclic group or a C1-C60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C1-C60 alkyl group, a C1-C6 alkoxy group, a phenyl group, a biphenyl group, a pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a pyrazinyl group, a triazinyl group, or any combination thereof.