Organic light emitting device and display apparatus

An organic light emitting device, comprising a light-emitting layer, wherein the light-emitting layer comprises a host material and a dye, the host material is a triplet-triplet annihilation material, and the dye is a boron-nitrogen material represented by Formula 1-1:

• wherein, each of Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8, Z9, Z10, Z11, Z12, Z13, Z14, Z15, Z16, Z17, and Z18 is independently selected from N or CRb;
• wherein Rb is independently selected from one of hydrogen, deuterium, halogen, cyano, or one of the following groups:
• substituted or unsubstituted C1-C36 alkyl, substituted or unsubstituted C2-C6 alkenyl, substituted or unsubstituted C1-C6 alkoxy or thioalkoxy, substituted or unsubstituted C6-C48 monocyclic or polycyclic aromatic hydrocarbon, substituted or unsubstituted C3-C48 monocyclic or polycyclic heteroaromatic hydrocarbon, and two adjacent Rb groups are independent to each other or at least two adjacent Rb groups are bonded to each other to form C3-C10 cycloalkane, C6-C30 aromatic hydrocarbon or C5-C30 hetero-aromatic hydrocarbon;
• wherein at least one of Z2, Z5, Z8, Z11, Z14, Z17 is an N atom;
• if substituents exist in the above group, each of the substituents is independently selected from one of deuterium, cyano, halogen, C1-C10 alkyl or cycloalkyl, C2-C6 alkenyl or cycloalkenyl, C1-C6 alkoxy or thioalkoxy, nitro, amine, carbonyl, carboxy, ester, C6-C30 aryl, and C3-C30 heteroaryl;
• wherein a triplet energy level of the dye is higher than that of the triplet-triplet annihilation material.

An organic light emitting device, comprising a light-emitting layer, wherein the light-emitting layer comprises a host material and a dye, the host material is a triplet-triplet annihilation material, and the dye is a boron-nitrogen material represented by Formula 1:

• wherein, each of Y1, Y2, and Y3 is B;
• each of X1, X2, and X3 is N;
• each of X4, X5 and X6 is independently selected from single bond, O, S or CRa;
• wherein Ra is independently selected from one of the following groups:
• substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C6-C30 monocyclic or polycyclic aromatic hydrocarbon, and C5-C30 monocyclic or polycyclic hetero-aromatic hydrocarbon;
• each of Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8, Z9, Z10, Z11, Z12, Z13, Z14, Z15, Z16, Z17, and Z18 is independently selected from N or CRb, wherein Rb is independently selected from one of hydrogen, deuterium, halogen, cyano, or one of the following groups:
• substituted or unsubstituted C1-C36 alkyl, substituted or unsubstituted C2-C6 alkenyl, substituted or unsubstituted C1-C6 alkoxy or thioalkoxy, substituted or unsubstituted C6-C48 monocyclic or polycyclic aromatic hydrocarbon, substituted or unsubstituted C3-C48 monocyclic or polycyclic heteroaromatic hydrocarbon, and two adjacent Rb groups are independent to each other or at least two adjacent Rb groups are bonded to each other to form C3-C10 cycloalkane, C6-C30 aromatic hydrocarbon or C5-C30 hetero-aromatic hydrocarbon;
• Z19 is C;
• and
• if substituents exist in the above group, each of the substituents is independently selected from one of deuterium, cyano, halogen, C1-C10 alkyl or cycloalkyl, C2-C6 alkenyl or cycloalkenyl, C1-C6 alkoxy or thioalkoxy, nitro, amine, carbonyl, carboxy, ester, C6-C30 aryl, and C3-C30 heteroaryl;
• wherein a triplet energy level of the dye is higher than that of the triplet-triplet annihilation material;
• wherein the dye has a mass proportion of 5%-20%, based on a total mass of the light-emitting layer;
• wherein the boron-nitrogen material is selected from compounds represented by the following structures: