Organic light emitting device

1 . An organic light emitting device comprising:

a substrate; and

an organic light emitting diode over the substrate, the organic light emitting diode including a first electrode, a second electrode facing the first electrode and an emissive layer disposed between the first electrode and the second electrode,

wherein the emissive layer comprises a first emitting material layer including a first dopant and a first host, a first electron blocking layer disposed between the first electrode and the first emitting material layer, and a first hole blocking layer disposed between the first emitting material layer and the second electrode,

wherein the first emitting material layer emits blue light,

wherein the first dopant includes a boron-based compound selected from the group consisting of:

wherein the first host includes an anthracene-based compound having the following structure of Formula 3,

wherein the first electron blocking layer includes an amine-based compound having the following structure of Formula 5, and

wherein the first hole blocking layer includes an azine-based compound selected from the group consisting of: (i) compound E15, (ii) compound E16, (iii) compound E17, (iv) compound E18, and (v) any combination of (i) to (iv):

wherein each of Ar1 and Ar2 is independently a C 6 -C 30 aryl group or a C 5 -C 30 hetero aryl group; L is a single bond, a C 6 -C 20 arylene group or a C 5 -C 20 hetero arylene group; a is an integer of 0 to 8; each of b, c and d is independently an integer of 0 to 30, wherein at least one of a, b, c and d is a positive integer;

wherein L 3 is C 6 -C 30 arylene; each of R 121 and R 122 is independently hydrogen or adjacent two of R 121 and R 122 form C 10 -C 20 fused aryl or C 10 -C 20 fused hetero aryl, wherein each of the C 10 -C 20 fused aryl and the C 10 -C 20 fused hetero aryl is independently unsubstituted or substituted with C 1 -C 10 alkyl; R 123 is hydrogen or C 6 -C 30 aryl; R 124 is C 5 -C 30 hetero aryl; o is 0 or 1; p is a number of the substituent R 121 and is an integer of 0 to 4; and q is a number of the substituent R 122 and is an integer of 0 to 5.

2 . The organic light emitting device of claim 1 , wherein the first host is selected from the following anthracene-based compounds:

3 . The organic light emitting device of claim 1 , wherein the amine-based compound is selected from the following amine-based compounds:

4 . The organic light emitting device of claim 1 , the emissive layer further comprises a second emitting material layer disposed between the first emitting material layer and the second electrode and a first charge generation layer disposed between the first and second emitting material layers.

5 . The organic light emitting device of claim 4 , wherein the second emitting material layer emits blue light, and the second emitting material layer includes a second dopant and a second host, wherein the second dopant includes the boron-based compound, and wherein the second host includes the anthracene-based compound having the structure of Formula 3.

6 . The organic light emitting device of claim 4 , the emissive layer further comprises a second electron blocking layer disposed between the first charge generation layer and the second emitting material layer, and wherein the second electron blocking layer includes the amine-based compound having the structure of Formula 5.

7 . The organic light emitting device of claim 4 , wherein the first hole blocking layer is disposed between the first emitting material layer and the first charge generation layer, and the emissive layer further comprises a second hole blocking layer disposed between the second emitting material layer and the second electrode.

8 . The organic light emitting device of claim 4 , the emissive layer further comprises a third emitting material layer disposed between the second emitting material layer and the second electrode and a second charge generation layer disposed between the second and third emitting material layers.

9 . The organic light emitting device of claim 1 , wherein the substrate defines a red pixel region, a green pixel region and a blue pixel region and the organic light emitting diode is located correspondingly to the red pixel region, the green pixel region and the blue pixel region, and the organic light emitting device further comprises a color conversion layer disposed between the substrate and the organic light emitting diode or over the organic light emitting diode correspondingly to the red pixel region and the green pixel region.

10 . The organic light emitting device of claim 4 , wherein the second emitting material layer emits yellow-green light or red-green light.

11 . The organic light emitting device of claim 8 , wherein the second emitting material layer emits yellow-green light or red-green light.

12 . The organic light emitting device of claim 10 , wherein the substrate defines a red pixel region, a green pixel region and a blue pixel region and the organic light emitting diode is located correspondingly to the red pixel region, the green pixel region and the blue pixel region, and the organic light emitting device further comprises a color filter layer disposed between the substrate and the organic light emitting diode or over the organic light emitting diode correspondingly to the red pixel region, the green pixel region and the blue pixel region.

13 . The organic light emitting device of claim 11 , wherein the substrate defines a red pixel region, a green pixel region and a blue pixel region and the organic light emitting diode is located correspondingly to the red pixel region, the green pixel region and the blue pixel region, and the organic light emitting device further comprises a color conversion layer disposed between the substrate and the organic light emitting diode or over the organic light emitting diode correspondingly to the red pixel region and the green pixel region.