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

1. An organic light-emitting display apparatus, comprising:

a substrate;

a first electrode on the substrate;

a pixel defining layer on the substrate and on the first electrode, the pixel defining layer including an opening that exposes the first electrode;

an intermediate layer on the first electrode, the intermediate layer including an organic emission layer;

a second electrode on the intermediate layer and on the pixel defining layer, and

a plurality of particles, the plurality of particles including a first set of particles contacting a top surface of the first electrode and the intermediate layer, a second set of particles contacting a side surface of the pixel defining layer and the intermediate layer, and a third set of particles contacting a top surface of the pixel defining layer, contacting the second electrode, and not contacting the intermediate layer.

2. The organic light-emitting display apparatus as claimed in claim 1 , wherein a size of the particles of the plurality of particles is from about 300 angstroms to about 1000 angstroms.

3. The organic light-emitting display apparatus as claimed in claim 1 , wherein the particles of the plurality of particles include Ag.

4. The organic light-emitting display apparatus as claimed in claim 1 , wherein the first electrode includes a transmissive conductive material.

5. The organic light-emitting display apparatus as claimed in claim 4 , wherein the transmissive conductive material includes at least one of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In 2 O 3 ), indium gallium oxide (IGO), and aluminum zinc oxide (AZO).

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

forming a first electrode on a substrate;

forming a pixel defining layer on the substrate and on the first electrode, the pixel defining layer including an opening that exposes the first electrode,

forming a plurality of particles, the plurality of particles including a first set of particles on a top surface of the first electrode, a second set of particles on a side surface and a third set of particles on a top surface of the pixel defining layer;

forming an intermediate layer including an organic emission layer on the first electrode and the particle unit; and

forming a second electrode on the intermediate layer, such that the first set of particles contacts the top surface of the first electrode and the intermediate layer, the second set of particles contacts the side surface of the pixel defining layer and the intermediate layer, and the third set of particles contacts the top surface of the pixel defining layer, contacts the second electrode, and does not contact the intermediate layer.

7. The method as claimed in claim 6 , wherein the forming of the plurality of particles includes:

forming a conductive layer that includes Ag; and

performing a thermal treatment on the conductive layer so as to allow the Ag to agglomerate.

8. The method as claimed in claim 7 , wherein a thickness of the conductive layer is about 10 angstroms to about 200 angstroms.

9. The method as claimed in claim 7 , wherein the thermal treatment is performed in a nitrogen atmosphere.

10. The method as claimed in claim 7 , wherein the thermal treatment is performed at a temperature in a range of about 250 degrees Celsius to about 300 degrees Celsius.