Organic light-emitting device

An organic light emitting device, comprising:

• an anode;
• a cathode;
• a light emitting layer provided between the anode and the cathode;
• and
• a first organic material layer provided between the light emitting layer and the cathode,
• wherein the first organic material layer is a hole blocking layer having a thickness of 10 Å to 50 Å,
• wherein the light emitting layer includes a compound selected from among the following Chemical Formulae 103 to 106, and the first organic material layer includes a compound of the following Chemical Formula 2:
• wherein in Chemical Formulae 103 to 106:
• X1 is O or S;
• R1 is hydrogen, deuterium, a cyano group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amine group, or bond to adjacent substituents to form a substituted or unsubstituted ring;
• r1 is an integer of 0 to 3, and when r1 is 2 or 3, the R1s are the same as or different from each other;
• n1 is 1 or 2:
• (a) r2 is 2 and the two R2 substituents bond together to form a substituted cyclohexyl ring of the following formula:
• where * means a fused position and r3 and r301 each is an integer of 0 to 4, and R3 is hydrogen, deuterium, a cyano group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amine group, and when r3 or r301 is 2 to 4, the R3s are the same as or different from each other, or adjacent R3 substituents bond together to form a substituted or unsubstituted aromatic hydrocarbon ring, a substituted or unsubstituted aliphatic hydrocarbon ring, or a substituted or unsubstituted fused ring of aromatic hydrocarbon ring and aliphatic hydrocarbon ring;
• or
• (b) r2 is an integer of 0 to 4 and R2 is hydrogen, deuterium, a cyano group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amine group, and when r2 is 2 to 4, the R2s are the same as or different from each other, or adjacent R2 substituents bond together to form a substituted or unsubstituted aromatic hydrocarbon ring, a substituted or unsubstituted aliphatic hydrocarbon ring, or a substituted or unsubstituted fused ring of aromatic hydrocarbon ring and aliphatic hydrocarbon ring;
• and r3 and r301 each is 2 and the R3 substituents bond together to form a cyclohexyl ring that is unsubstituted or substituted with deuterium, a methyl group or CD3 or form an adamantyl ring that is unsubstituted or substituted with deuterium, a methyl group or CD3;
• R4 and R5 are the same as or different from each other, and each independently is hydrogen, deuterium, a cyano group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amine group, or adjacent R4 substituents or adjacent R5 substituents bond to each other to form a substituted or unsubstituted ring;
• and
• r4 and r5 are each an integer of 0 to 5, and when r4 and r5 are 2 to 5, the substituents in the parentheses are the same as or different from each other;
• wherein in Chemical Formula 2:
• X11 to X13 are N or CR′, and at least one of X11 to X13 is N;
• R′ is hydrogen, deuterium, a cyano group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, or a substituted or unsubstituted heterocyclic group;
• L1 is a direct bond;
• a substituted or unsubstituted arylene group or a substituted or unsubstituted divalent heterocyclic group;
• m1 is an integer of 1 to 3, and when m1 is 2 or greater, the L1s are the same as or different from each other;
• Ar1 and Ar2 are the same as or different from each other, and each independently is a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group;
• and
• Ar3 is Chemical Formula 2-C:
• wherein in Chemical Formula 2-C:
• X4 is O, S, or NR25;
• X5 is O, S, or NR22;
• any one of R23 to R25 is linked to Chemical Formula 2, and the rest are the same as or different from each other, and each independently is hydrogen, deuterium, a cyano group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amine group, or bond to adjacent substituents to form a substituted or unsubstituted ring;
• r23 is an integer of 0 to 4, and r24 is an integer of 0 to 8;
• and
• when r23 and r24 are 2 or greater, substituents in the parentheses are the same as or different from each other.