Stacked-layered thin film solar cell and manufacturing method thereof

A manufacturing method of a stacked-layered thin film solar cell that is constructed of a plurality of unit cells, comprising:

• providing a substrate and forming a first electrode layer on the substrate;
• forming at least one first separation groove extending downward within the first electrode layer, forming a first photoconductive layer on the first electrode layer and forming an interlayer on the first photoconductive layer;
• forming at least one second separation groove within the interlayer by removing only parts of the interlayer without exposing the first electrode layer, wherein the first separation groove and the second separation groove are separated from each other;
• forming a second photoconductive layer on the first photoconductive layer and the partially removed interlayer without directly contacting with the first electrode layer;
• forming at least one connection groove within the second photoconductive layer downward extending to a border located between the first photoconductive layer and the first electrode layer, wherein the connection groove is located inside the second separation groove;
• forming a second electrode layer on the second photoconductive layer;
• and
• forming at least one third separation groove within the second electrode layer extending downward to a part of the first photoconductive layer in depth without exposing the first electrode layer, wherein the third separation groove is located inside the second separation groove and adjacent to the connection groove, and a bottom of the third separation groove is kept with a distance from the first electrode layer.