Organic light-emitting device

An organic light-emitting device comprising:

• a first electrode;
• a second electrode;
• a plurality of light-emitting units in the number of m disposed between the first electrode and the second electrode and comprising at least one emission layer;
• and
• a plurality of charge generation layers in the number of m−1 disposed between two neighboring light-emitting units among the light-emitting units in the number of m and comprising an n-type charge generation layer and a p-type charge generation layer,
• wherein m is an integer of 2 or more,
• a maximum emission wavelength of light emitted by at least one light-emitting unit among the light-emitting units in the number of m is different from a maximum emission wavelength of light emitted by at least one light-emitting unit among the other light-emitting units,
• the emission layer comprises a host, a dopant, and a sensitizer,
• the host does not comprise a metal atom,
• the dopant emits light, and the light has a decay time of about 100 nanoseconds or less, and
• the sensitizer comprises an organometallic compound represented by one selected from Formulae 1 and 2:
• wherein, in Formulae 1 and 2,
• M11 and M12 are each independently selected from beryllium (Be), magnesium (Mg), aluminum (Al), calcium (Ca), titanium (Ti), manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), zirconium (Zr), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), rhenium (Re), platinum (Pt), gold (Au), iridium (Ir), osmium (Os), hafnium (Hf), europium (Eu), terbium (Tb), and thulium (Tm),
• A11 to A14 and A21 to A24 are each independently selected from a C5-C60 carbocyclic group and a C1-C60 heterocyclic group,
• Y11 to Y14 and Y21 to Y24 are each independently selected from N and C,
• T11 to T14 are each independently selected from a covalent bond, a coordinate bond, O, S, N(R15), P(R15), B(R15), C(R15)(R16), and Si(R15)(R16),
• T21 to T24 are each independently selected from a covalent bond, a coordinate bond, O, S, N(R25), P(R25), B(R25), C(R25)(R26), and Si(R25)(R26),
• L11 to L13 are each independently selected from *—O—*′, *—S—*′, *—C(R17)(R18)—*′, *—C(R17)═*′, *═C(R17)—*′, *—C(R17)═C(R18)—*′, *—C(═O)—*′, *—C(═S)—*′, *—C≡C—*′, *—B(R17)—*′, *—N(R17)—*′, *—P(R17)—*′, *—Si(R17)(R18)—*′, *—P(R17)(R18)—*′, and *—Ge(R17)(R18)—*′,
• L21 to L24 are each independently selected from *—O—*′, *—S—*′, *—C(R27)(R28)—*, *—C(R27)═*′, *═C(R27)—*′, *—C(R27)═C(R28)—*′, *—C(═O)—*′, *—C(═S)—*′, *—C≡C—*′, *—B(R27)—*, *—N(R27)—*′, *—P(R27)—*′, *—Si(R27)(R28)—*′, *—P(R27)(R28)—*′, and *—Ge(R27)(R28)—*′,
• a11 to a13 and a21 to a24 are each independently selected from 0 and 1,
• when a11 is 0, (L11)a11 is a covalent bond, when a12 is 0, (L12)a12 is a covalent bond, when a13 is 0, (L13)a13 is a covalent bond, when a21 is 0, (L21)a21 is a covalent bond, when a22 is 0, (L22)a22 is a covalent bond, when a23 is 0, (L23)a23 is a covalent bond, and when a24 is 0, (L24)a24 is a covalent bond,
• L15 to L18 and L25 to L28 are each independently selected from a substituted or unsubstituted C5-C30 carbocyclic group and a substituted or unsubstituted C1-C30 heterocyclic group,
• a15 to a18 and a25 to a28 are each independently selected from 0, 1, 2, 3, 4, and 5,
• R11 to R18 and R21 to R28 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, —SF5, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C7-C60 alkylaryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted C2-C60 alkylheteroaryl group, a substituted or unsubstituted C1-C60 heteroaryloxy group, a substituted or unsubstituted C1-C60 heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q1)(Q2)(Q3), —B(Q1)(Q2), —N(Q1)(Q2), —P(Q1)(Q2), —C(═O)(Q1), —S(═O)(Q1), —S(═O)2(Q1), —P(═O)(Q1)(Q2), and —P(═S)(Q1)(Q2),
• R17 and R11, R17 and R12, R17 and R13, and/or R17 and R14 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R27 and R21, R27 and R22, R27 and R23, and/or R27 and R24 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R11 and R12, R12 and R13, R13 and R14, and/or R11 and R14 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R21 and R22, R22 and R23, R23 and R24, and/or R21 and R24 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R17 and R18 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group, and R27 and R28 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• b11 to b14 and b21 to b24 are each independently selected from 1, 2, 3, 4, and 5,
• n11 to n14 and n21 to n24 are each independently selected from 1, 2, 3, 4, 5, 6, 7, and 8,
• Q1 to Q3 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a C2-C60 alkylheteroaryl group, a C1-C60 heteroaryloxy group, a C1-C60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a C1-C60 alkyl group substituted with at least one selected from deuterium, —F, a cyano group, a C1-C60 alkyl group, and a C6-C60 aryl group, and a C6-C60 aryl group substituted with at least one selected from deuterium, —F, a cyano group, a C1-C60 alkyl group, and a C6-C60 aryl group, and
• * and *′ each indicate a binding site to a neighboring atom.

An organic light-emitting device comprising:

• a first electrode;
• a second electrode;
• and
• a plurality of emission layers in the number of m disposed between the first electrode and the second electrode,
• wherein m is an integer of 2 or more,
• a maximum emission wavelength of light emitted by at least one emission layer among the emission layers in the number of m is different from a maximum emission wavelength of light emitted by at least one emission layer among the other emission layers,
• the emission layer comprises a host, a dopant, and a sensitizer,
• the host does not comprise a metal atom,
• the dopant emits light, and the light has a decay time of about 100 nanoseconds or less, and
• the sensitizer comprises an organometallic compound represented by one selected from Formulae 1 and 2:
• wherein, in Formulae 1 and 2,
• M11 and M12 are each independently selected from beryllium (Be), magnesium (Mg), aluminum (Al), calcium (Ca), titanium (Ti), manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), zirconium (Zr), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), rhenium (Re), platinum (Pt), gold (Au), iridium (Ir), osmium (Os), hafnium (Hf), europium (Eu), terbium (Tb), and thulium (Tm),
• A11 to A14 and A21 to A24 are each independently selected from a C5-C60 carbocyclic group and a C1-C60 heterocyclic group,
• Y11 to Y14 and Y21 to Y24 are each independently selected from N and C,
• T11 to T14 are each independently selected from a covalent bond, a coordinate bond, O, S, N(R15), P(R15), B(R15), C(R15)(R16), and Si(R15)(R16),
• T21 to T24 are each independently selected from a covalent bond, a coordinate bond, O, S, N(R25), P(R25), B(R25), C(R25)(R26), and Si(R25)(R26),
• L11 to L13 are each independently selected from *—O—*′, *—S—*′, *—C(R17)(R18)—*′, *—C(R17)═′*, *═C(R17)—*′, *—C(R17)═C(R18)—*′, *—C(═O)—*′, *—C(═S)—*′, *—C≡C—*′, *—B(R17)—*′, *—N(R17)—*′, *—P(R17)—*′, *—Si(R17)(R18)—*′, *—P(R17)(R18)—*′, and *—Ge(R17)(R18)—*′,
• L21 to L24 are each independently selected from *—O—*′, *—S—*′, *—C(R27)(R28)—*, *—C(R27)═*′, *═C(R27)—*′, *—C(R27)═C(R28)—*′, *—C(═O)—*′, *—C(═S)—*′, *—C≡C—*′, *—B(R27)—*, *—N(R27)—*′, *—P(R27)—*′, *—Si(R27)(R28)—*′, *—P(R27)(R28)—*′, and *—Ge(R27)(R28)—*′,
• a11 to a13 and a21 to a24 are each independently selected from 0 and 1,
• when a11 is 0, (L11)a11 is a covalent group, when a12 is 0, (L12)a12 is a covalent group, when a13 is 0, (L13)a13 is a covalent group, when a21 is 0, (L21)a21 is a covalent group, when a22 is 0, (L22)a22 is a covalent group, when a23 is 0, (L23)a23 is a covalent group, and when a24 is 0, (L24)a24 is a covalent group,
• L15 to L18 and L25 to L28 are each independently selected from a substituted or unsubstituted C5-C30 carbocyclic group and a substituted or unsubstituted C1-C30 heterocyclic group,
• a15 to a18 and a25 to a28 are each independently selected from 0, 1, 2, 3, 4, and 5,
• R11 to R18 and R21 to R28 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, —SF5, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C7-C60 alkylaryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted C2-C60 alkylheteroaryl group, a substituted or unsubstituted C1-C60 heteroaryloxy group, a substituted or unsubstituted C1-C60 heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q1)(Q2)(Q3), —B(Q1)(Q2), —N(Q1)(Q2), —P(Q1)(Q2), —C(═O)(Q1), —S(═O)(Q1), —S(═O)2(Q1), —P(═O)(Q1)(Q2), and —P(═S)(Q1)(Q2),
• R17 and R11, R17 and R12, R17 and R13, and/or R17 and R14 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R27 and R21, R27 and R22, R27 and R23, and/or R27 and R24 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R11 and R12, R12 and R13, R13 and R14, and/or R11 and R14 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R21 and R22, R22 and R23, R23 and R24, and/or R21 and R24 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• R17 and R18 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group, and R27 and R28 are optionally linked to form a substituted or unsubstituted C5-C60 carbocyclic group or a substituted or unsubstituted C1-C60 heterocyclic group,
• b11 to b14 and b21 to b24 are each independently selected from 1, 2, 3, 4, and 5,
• n11 to n14 and n21 to n24 are each independently selected from 1, 2, 3, 4, 5, 6, 7, and 8,
• Q1 to Q3 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a C2-C60 alkylheteroaryl group, a C1-C60 heteroaryloxy group, a C1-C60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a C1-C60 alkyl group substituted with at least one selected from deuterium, —F, a cyano group, a C1-C60 alkyl group, and a C6-C60 aryl group, and a C6-C60 aryl group substituted with at least one selected from deuterium, —F, a cyano group, a C1-C60 alkyl group, and a C6-C60 aryl group, and
• * and *′ each indicate a binding site to a neighboring atom.