| 主权项 |
1. An organic light-emitting device, comprising:
a first electrode; a second electrode facing the first electrode; and an emission layer between the first electrode and the second electrode, the emission layer including a dopant, a first host, and a second host, wherein the dopant is a material emitting delayed fluorescence, the first host is a compound represented by Formula 1 below, and the second host includes a compound represented by any one of Formulae 2-1, 2-2, and 2-3 below: wherein, in Formulae 2-1, 2-2, and 2-3, X is N, S, or O, X2 is NR6, O, or S, X3 is NR9, O, or S, Y1 is CR12 or N, Y2 is CR13 or N, Y3 is CR14 or N, and Y4 is CR15 or N, wherein at least one of Y1, Y2, Y3, and Y4 is N, R1 to R15 are each independently selected from a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, a C1-C20 alkoxy group, a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C6-C40 aryl group, a C2-C40 heteroaryl group, a C5-C40 aryloxy group, a C5-C40 arylthio group, —N(Q1)(Q2) (wherein Q1 and Q2 are each independently a C6-C40 aryl group), —P(═O)(Q3)(Q4) (wherein Q3 and Q4 are each independently a C6-C40 aryl group), —Si(Q5)(Q6)(Q7) (wherein Q5, Q6, and Q7 are each independently a C6-C40 aryl group), a C8-C40 non-aromatic condensed polycyclic group, and a C2-C60 non-aromatic condensed heteropolycyclic group; a C1-C40 alkyl group, a C2-C40 alkenyl group, a C2-C40 alkynyl group, and a C1-C40 alkoxy group, each substituted with at least one of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof and a phosphoric acid or a salt thereof, a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C5-C40 aryl group, a C2-C40 heteroaryl group, a C5-C40 aryloxy group, and a C5-C40 arylthio group; and a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C5-C40 aryl group, a C2-C40 heteroaryl group, a C8-C40 non-aromatic condensed polycyclic group, a C2-C60 non-aromatic condensed heteropolycyclic group, a C5-C40 aryloxy group, and a C5-C40 arylthio group, each substituted with at least one of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, a C1-C20 alkoxy group, a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C5-C40 aryl group, a C2-C40 heteroaryl group, a C5-C40 aryloxy group, and a C5-C40 arylthio group, wherein a plurality of R2 to R3 are independent from each other,L1 to L7 are each independently selected from a direct bond, —O—, a C3-C10 cycloalkylene group, a C6-C40 arylene group, a C2-C40 heteroarylene group, a C5-C40 divalent non-aromatic condensed polycyclic group, or a C2-C60 divalent non-aromatic condensed heteropolycyclic group; and
a C3-C10 cycloalkylene group, a C6-C40 arylene group, a C2-C40 heteroarylene group, a C8-C40 divalent non-aromatic condensed polycyclic group, and a C2-C60 divalent non-aromatic condensed heteropolycyclic group, each substituted with at least one of a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof and a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, a C1-C20 alkoxy group, a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C5-C40 aryl group, a C2-C40 heteroaryl group, a C5-C40 aryloxy group, and a C8-C40 arylthio group, wherein a plurality of L2 to L3 are independent from each other, a1, b1, and c1 are each independently an integer of 0 to 3, a1 and a2 are 0 in a case of X being O or S, and a2 is 1 in a case of X being N, b and c are each independently an integer of 0 to 4, and d to g are each independently an integer of 0 to 3. |
