Manufacturing method for cigs base photovoltaic cell and cigs base photovoltaic cell

The present invention relates to a process for the preparation of a CIGS-based solar cell comprising a transparent back electrode, forming a rear electrode layer of a transparent oxide material; Forming a back electrode pattern of a metallic material on said bottom electrode; Forming a CIGS-based light absorption layer on the back electrode layer above the back electrode pattern is formed; Forming a buffer layer on the light absorption layer; And is configured to include a step of forming a front electrode of a transparent material over the buffer layer, the back electrode pattern may be formed a transmitting portion that the light transmission between the pattern of the metallic material. The present invention, by forming a back electrode pattern of a metal that light transmission is formed on the bottom electrode surface of the TCO material, it is possible to reduce the amount by which the formation of Ga