Organic light emitting display apparatus including an auxiliary layer and method for manufacturing the same

1. An organic light emitting display apparatus comprising:

a plurality of sub-pixel regions comprising: a red sub-pixel region; a green sub-pixel region; and a blue sub-pixel region, each of the sub-pixel regions comprising a first electrode on a substrate;

a distributed Bragg reflector (DBR) layer between the substrate and the first electrode;

a hole injection layer on the DBR layer and covering the first electrode;

a hole transport layer on the hole injection layer;

an auxiliary layer between the hole injection layer and the hole transport layer in the green sub-pixel region;

a green light-emission layer on the hole transport layer in the blue sub-pixel region and the green sub-pixel region;

a blue light-emission layer on the green light-emission layer in only the blue sub-pixel region; and

a red light-emission layer on the hole transport layer in only the red sub-pixel region.

2. The organic light emitting display apparatus of claim 1 , wherein the DBR layer is formed by alternately stacking a first layer and a second layer, wherein the first layer and the second layer have different refractive indexes.

3. The organic light emitting display apparatus of claim 2 , wherein a refractive index of the first layer is less than a refractive index of the second layer.

4. The organic light emitting display apparatus of claim 2 , wherein the first layer comprises silicon oxide (SiOx), and the second layer comprises silicon nitride (SiNx).

5. The organic light emitting display apparatus of claim 1 , further comprising a passivation layer between the substrate and the DBR layer.

6. The organic light emitting display apparatus of claim 5 , wherein the passivation layer has a thickness of about 3000 Å to about 6000 Å.

7. The organic light emitting display apparatus of claim 1 , wherein the green light-emission layer has a hole transport ability.

8. The organic light emitting display apparatus of claim 1 , wherein the auxiliary layer has a hole transport ability.

9. The organic light emitting display apparatus of claim 1 , wherein the auxiliary layer comprises a same material as the hole transport layer.

10. An organic light emitting display apparatus comprising:

a plurality of sub-pixel regions comprising: a red sub-pixel region; a green sub-pixel region; and a blue sub-pixel region, each of the sub-pixel regions comprising a first electrode on a substrate;

a distributed Bragg reflector (DBR) layer between the substrate and the first electrode;

a hole injection layer on the DBR layer and covering the first electrode;

a hole transport layer on the hole injection layer;

an auxiliary layer between the hole injection layer and the hole transport layer in the red sub-pixel region;

a red light-emission layer on the hole transport layer in the blue sub-pixel region and the red sub-pixel region;

a blue light-emission layer on the red light-emission layer in only the blue sub-pixel region; and

a green light-emission layer on the hole transport layer in only the green sub-pixel region.

11. The organic light emitting display apparatus of claim 10 , wherein the DBR layer is formed by alternately stacking a first layer and a second layer, wherein the first layer and the second layer have different refractive indexes.

12. The organic light emitting display apparatus of claim 11 , wherein a refractive index of the first layer is less than a refractive index of the second layer.

13. The organic light emitting display apparatus of claim 11 , wherein the first layer comprises silicon oxide (SiOx), and the second layer comprises silicon nitride (SiNx).

14. The organic light emitting display apparatus of claim 10 , further comprising a passivation layer between the substrate and the DBR layer.

15. The organic light emitting display apparatus of claim 14 , wherein the passivation layer has a thickness of about 3000 Å to about 6000 Å.

16. The organic light emitting display apparatus of claim 10 , wherein the red light-emission layer has a hole transport ability.

17. The organic light emitting display apparatus of claim 10 , wherein the auxiliary layer has a hole transport ability.

18. The organic light emitting display apparatus of claim 10 , wherein the auxiliary layer comprises a same material as the hole transport layer.

19. A method of manufacturing an organic light emitting display apparatus, the method comprising:

forming a distributed Bragg reflector (DBR) layer on a substrate on which a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region are located;

forming a first electrode on the D 13 R layer and corresponding to the red, green, and blue sub-pixel regions;

forming a hole injection layer on the substrate and covering the first electrode;

forming an auxiliary layer on the hole injection layer in the green sub-pixel region;

forming a hole transport layer on the hole injection layer and covering the auxiliary layer;

forming a green light-emission layer on the hole transport layer in the blue sub-pixel region and the green sub-pixel region;

forming a blue light-emission layer on the green light-emission layer in only the blue sub-pixel region; and

forming a red light-emission layer on the hole transport layer in only the red sub-pixel region.

20. The method of claim 19 , wherein the DBR layer is formed by alternately stacking a first layer and a second layer, wherein the first layer and the second layer have different refractive indexes.

21. The method of claim 20 , wherein a refractive index of the first layer is less than a refractive index of the second layer.

22. The method of claim 20 , wherein the first layer comprises silicon oxide (SiOx), and the second layer comprises silicon nitride (SiNx).

23. The method of claim 19 , further comprising forming a passivation layer on the substrate, prior to the forming of the IBR layer.

24. The method of claim 23 , wherein the passivation layer has a thickness of about 3000 Å to about 6000 Å.

25. The method of claim 19 , wherein the green light-emission layer has a hole transport ability.

26. The method of claim 19 , wherein the auxiliary layer has a hole transport ability.

27. The method of claim 19 , wherein the auxiliary layer comprises a same material as the hole transport layer.

28. A method of manufacturing an organic light emitting display apparatus, the method comprising:

forming a distributed Bragg reflector (DBR) layer on a substrate on which a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region are located;

forming a first electrode on the DBR layer and corresponding to the red, green, and blue sub-pixel regions;

forming a hole injection layer on the substrate and covering the first electrode;

forming an auxiliary layer on the hole injection layer in the red sub-pixel region;

forming a hole transport layer on the hole injection layer and covering the auxiliary layer;

forming a red light-emission layer on the hole transport layer in the blue sub-pixel region and the red sub-pixel region;

forming a blue light-emission layer on the red light-emission layer in only the blue sub-pixel region; and

forming green light-emission layer on the hole transport layer in only the green sub-pixel region.

29. The method of claim 28 , wherein the DBR layer is formed by alternately stacking a first layer and a second layer, wherein the first layer and the second layer have different refractive indexes.

30. The method of claim 29 , wherein a refractive index of the first layer is less than a refractive index of the second layer.

31. The method of claim 29 , wherein the first layer comprises silicon oxide (SiOx), and the second layer comprises silicon nitride (SiNx).

32. The method of claim 28 , further comprising forming a passivation layer above the substrate, prior to the forming of the DBR layer.

33. The method of claim 32 , wherein the passivation layer has a thickness of about 3000 Å to about 6000 Å.

34. The method of claim 28 , wherein the red light-emission layer has a hole transport ability.

35. The method of claim 28 , wherein the auxiliary layer has a hole transport ability.

36. The method of claim 28 , wherein the auxiliary layer comprises a same material as the hole transport layer.