MANUFACTURING METHOD OF CHALCOGENIDE SOLAR CELL WITH DOUBLE TEXTURE STRUCTURE HAVING A TEXTURED SUBSTRATE AND CHALCOGENIDE SOLAR CELL BY THE SAME

摘要

The present invention relates to a method for manufacturing a solar cell having a dual texture structure in which texture is formed on a substrate, and comprises the steps of: preparing a substrate; forming substrate texture on the surface of the substrate; forming a rear surface electrode on the substrate; forming a light absorption layer made from a chalcogenide semiconductor material on top of the rear surface electrode; forming a buffer layer on top of the light absorption layer; forming a transparent electrode on top of the buffer layer; and forming front surface texture on the surface of the transparent electrode, wherein an uneven surface is formed on the rear surface electrode due to the substrate texture. The chalcogenide solar cell having the dual texture structure in which the texture is formed on the substrate, according to the present invention, comprises: the substrate; the rear surface electrode which is formed on top of the substrate; the light absorption layer made from the chalcogenide semiconductor material which is formed on top of the rear surface electrode; the buffer layer which is formed on top of the light absorption layer; and the transparent electrode which is formed on top of the buffer layer, wherein a rear texture structure is formed on the surface of the rear surface electrode which comes into contact with the light absorption layer, and a front surface texture structure is formed on the surface of the transparent electrode. The present invention provides the advantage of increasing photoelectric conversion efficiency due to a significant increase in light-trapping capability by having the dual texture structure comprising the front surface texture and the rear surface texture.