SOLAR CELL HAVING REAR BUFFER LAYER AND METHOD OF MANUFACTURING THE SAME

摘要

The invention relates a thin-film solar cell. In the related art, a buffer layer, a transparent electrode, and a grid electrode are formed on a light absorption layer, but in the invention, the buffer layer and the transparent electrode are not formed on a light absorption layer, and the buffer layer, the transparent electrode, and the grid electrode are formed under a CIGS face such that solar light is directly input to the light absorption layer without obstacles, and the first electrode and the buffer layer are patterned in a saw-toothed structure to engage with each other to reduce a distance by which electrons or holes generated by absorbing light energy move to the electrode or the buffer layer.

主权项

1. A solar cell comprising:
a substrate; a first electrode that is formed in a specific area on the substrate; a buffer layer that is disposed separately at a predetermined gap from the first electrode on the substrate; and a light absorption layer that is formed on the first electrode, the buffer layer, and the substrate between the first electrode and the buffer layer, wherein the first electrode and the buffer layer are electrically separated from each other by a material of the light absorption layer, and wherein the buffer layer is positioned under the light absorption layer to increase the amount of incident light of the light absorption layer.