Organic light emitting device and display device including the same

An organic light emitting device, comprising:

• a first electrode;
• a hole transport region on the first electrode;
• an emission layer on the hole transport region;
• an electron transport region on the emission layer;
• and
• a second electrode on the electron transport region,
• wherein the hole transport region includes a compound represented by the following Formula 1b or Formula 1c
• wherein, in Formula 1b and Formula 1c,
• R2 and R3 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms, or combine with an adjacent group to form a ring,
• n2 and n3 are each independently an integer of 0 to 5,
• Y1 is selected from O, NR9, and CR10R11,
• R7, R8, R9, R10, and R11 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms,
• n5 is an integer of 0 to 7, n6 is an integer of 0 to 9,
• the compound represented by Formula 1 b is not
• and
• wherein the electron transport region includes a compound represented by the following Formula 5:
• wherein, in Formula 5,
• Ar1, Ar2, Ar3, and Ar4 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms,
• X1, X2, and X3 are each independently selected from CR5 and N,
• R4 and R5 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms, and
• n4 is an integer of 0 to 3,
• wherein the compound represented by Formula 5 of the electron transport region includes one of the following compounds:

A display device, comprising a plurality of pixels, wherein one of the pixels includes:

• a first electrode;
• a hole transport region on the first electrode;
• an emission layer on the hole transport region;
• an electron transport region on the emission layer;
• and
• a second electrode on the electron transport region,
• wherein the hole transport region includes a compound represented by the following Formula 1b or Formula 1c
• wherein, in Formula 1b and Formula 1c,
• R2 and R3 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms, or combine with an adjacent group to form a ring,
• n2 and n3 are each independently an integer of 0 to 5,
• Y1 is selected from O, NR9, and CR10R11,
• R7, R8, R9, R10, and R11 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms,
• n5 is an integer of 0 to 7, n6 is an integer of 0 to 9,
• the compound represented by Formula 1b is not
• and
• wherein the electron transport region includes a compound represented by the following Formula 5:
• wherein, in Formula 5,
• Ar1, Ar2, Ar3, and Ar4 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms,
• X1, X2, and X3 are each independently selected from CR5 and N, and at least one of X1, X2, and X3 is a N,
• R4 and R5 are each independently selected from hydrogen, deuterium, a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms,
• n4 is an integer of 0 to 3, and
• wherein when Ar3 and Ar4 are each an unsubstituted phenyl group, Ar1 and Ar2 are each selected from hydrogen, deuterium, and a substituted or unsubstituted heteroaromatic group having 5 to 30 carbon atoms, and R4 is selected from hydrogen, deuterium, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and a substituted or unsubstituted aromatic group having 5 to 30 carbon atoms.