Organic light-emitting display apparatus and method of manufacturing the same

1. An organic light-emitting display apparatus comprising:

a buffer layer on a substrate, and comprising nanoparticles comprising nickel (Ni) and silicon (Si);

a pixel electrode on the buffer layer;

an organic emission layer on the pixel electrode; and

an opposite electrode on the organic emission layer.

2. The organic light-emitting display apparatus of claim 1 , wherein the nanoparticles comprise NiSi 2 .

3. The organic light-emitting display apparatus of claim 1 , wherein the buffer layer comprises a first buffer layer on the substrate and a second buffer layer on the first buffer layer, and the nanoparticles are between the first buffer layer and the second buffer layer.

4. The organic light-emitting display apparatus of claim 3 , further comprising a transflective metal layer between the first buffer layer and the second buffer layer, wherein the nanoparticles are between the second buffer layer and the transflective metal layer.

5. The organic light-emitting display apparatus of claim 1 , further comprising:

a thin film transistor comprising an active layer on the buffer layer and spaced apart from the pixel electrode, a first insulating layer on the active layer, a gate electrode on the first insulating layer, a second insulating layer covering the gate electrode, and source and drain electrodes that are electrically connected to the active layer, respectively, with the second insulating layer therebetween, one of the source and drain electrodes being electrically connected to the pixel electrode; and

a capacitor comprising a lower electrode that is at the same layer level as the active layer and is spaced apart from the active layer, and an upper electrode that is insulated from the lower electrode by the first insulating layer and is at the same layer level as the gate electrode.

6. The organic light-emitting display apparatus of claim 5 , wherein the first insulating layer is between the buffer layer and the pixel electrode.

7. The organic light-emitting display apparatus of claim 6 , wherein the first insulating layer comprises a plurality of layers, in which adjacent layers have different refractive indexes.

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

forming a buffer layer on a substrate, the buffer layer comprising nanoparticles comprising nickel (Ni) and silicon (Si);

forming a pixel electrode on the buffer layer;

forming an organic emission layer on the pixel electrode; and

forming an opposite electrode on the organic emission layer.

9. The method of claim 8 , wherein the nanoparticles comprise NiSi 2 .

10. The method of claim 8 , wherein the forming of the buffer layer comprising the nanoparticles comprises:

forming a first buffer layer on the substrate;

forming Ni particles on the first buffer layer;

forming a second buffer layer to cover the Ni particles; and

forming NiSi 2 by thermal annealing.

11. The method of claim 10 , further comprising forming a transflective metal layer on the first buffer layer before the forming of the Ni particles.

12. The method of claim 8 , wherein the forming of the buffer layer comprising the nanoparticles comprises:

forming a first buffer layer on the substrate;

forming Ni particles on the first buffer layer;

forming NiSi 2 nanoparticles by thermal annealing; and

forming a second buffer layer to cover the NiSi 2 nanoparticles.

13. The method of claim 12 , further comprising forming the transflective metal layer on the first buffer layer before the forming of the Ni particles.

14. The method of claim 8 , further comprising:

forming an active layer on the buffer layer and forming a lower electrode spaced apart from the active layer;

forming a first insulating layer to cover the active layer and the lower electrode, forming a gate electrode in an area corresponding to the active layer on the first insulating layer, and forming an upper electrode in an area corresponding to the lower electrode;

forming a second insulating layer having a first opening for partially exposing the pixel electrode, and second and third openings for partially exposing the active layer on the gate electrode;

forming source and drain electrodes, which are respectively connected to the active layer via the second opening and the third opening, on the second insulating layer, wherein one of the source and drain electrodes is connected to the pixel electrode via the first opening; and

forming a third insulating layer to cover the source and drain electrodes,

wherein the forming of the pixel electrode is performed at the same time as the forming of the gate electrode and the forming of the upper electrode.

15. The method of claim 14 , wherein the first insulating layer is formed between the buffer layer and the pixel electrode.

16. The method of claim 15 , wherein the first insulating layer comprises a plurality of layers, in which adjacent layers have different refractive indexes.