Electroluminescence device

1. An electroluminescence device comprising:

a substrate;

a first electrode disposed on the substrate;

a second electrode;

an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an electron transport layer;

wherein the electron transport layer is formed by depositing a final solution comprising a dispersion of nanoparticles in a solution comprising an electron transport layer material and a solvent, followed by evaporation of the solvent such that the formed electron transport layer comprises a density of the nanoparticles in the electron transport layer which is less than 7 nanoparticles/μm 2 ,

wherein each of the nanoparticles protrudes out of the electron transport layer and is completely or partially covered by the electron transport layer material to form a bulge section on the electron transport layer, and wherein the second electrode is disposed on at least the bulge section, and wherein a diameter of the nanoparticles is greater than a thickness of the electron transport layer.

2. The electroluminescence device of claim 1 , wherein the organic layer disposed between the first electrode and the second electrode corresponds to the electron transport layer.

3. The electroluminescence device of claim 1 , wherein the organic layer disposed between the first electrode and the second electrode comprises a hole injection layer, a hole transport layer, an emissive layer and the electron transport layer.

4. The electroluminescence device of claim 1 , wherein the final solution is deposited on the first electrode to form the electron transport layer using at least one of a spin coating technique, a screen printing technique, a web coating technique or an inkjet coating technique.

5. The electroluminescence device of claim 1 , wherein a weight percentage of the one or more nanoparticles is less than 0.5% in the final solution.

6. The electroluminescence device of claim 1 , wherein a diameter of each of the one or more nanoparticles is in a range from 60 nm to 150 nm.

7. The electroluminescence device of claim 1 , wherein a thickness of the organic layer is in a range from 10 nm to 120 nm.

8. The electroluminescence device of claim 1 , wherein a height of the bulge section on the organic layer is in a range from 50 nm to 200 nm.

9. The electroluminescence device of claim 1 , wherein each of the one or more nanoparticles are optically transparent and electrically insulating.

10. The electroluminescence device of claim 1 , wherein a material of the organic layer is selected from a group consisting of: MEH-PPV, PFO, P-PPV, Oligoquinolines, conjugated polyelectrolyte poly[9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)], 4,7-diphenyl-1,10-phenanthroline, 1,3,5-tri(3-pyrid-3-yl-phenyl)benzene and diphenylphosphine oxide derivatives.

11. The electroluminescence device of claim 1 , wherein the first electrode disposed on the substrate corresponds to an anode and wherein the second electrode disposed on at least the bulge section corresponds to a cathode.

12. The electroluminescence device of claim 1 , wherein the substrate corresponds to a transparent substrate.

13. A process of manufacturing the electroluminescence device according to claim 1 , wherein the process comprises dispersing the one or more nanoparticles in a first solution comprising an organic material and a solvent to form a final solution and depositing the final solution on the first electrode to form the organic layer.

14. A composition of an electron transport layer of an electroluminescence device, comprising;

a solvent;

an electron transport layer material dissolved in the solvent to form a solution;

a plurality of nanoparticles dispersed in the solution to form a final solution,

wherein a weight percentage of the plurality of nanoparticles in the final solution is less than 0.5%, and

wherein the final solution is deposited and the solvent is evaporated to form the electron transport layer in the electroluminescence device, such that the formed electron transport layer comprises a density of the one or more nanoparticles in the electron transport layer which is less than 7 nanoparticles/μm 2 , wherein each one of the nanoparticles protrudes out of the electron transport layer and is completely or partially covered by the electron transport layer material to form a bulge section on the electron transport layer, and a diameter of the nanoparticles is greater than a thickness of the electron transport layer.