Patent ID: 7741560

Claim:
A method for manufacturing a chalcopyrite solar cell, comprising the steps of: preparing a substrate made of mica or a material containing mica, and forming an intermediate layer made of a ceramic-based material and having a thickness equal to or more than 2 μm and equal to or less than 20 μm on said substrate for providing said substrate with a planar surface; forming a binder layer containing titanium nitride (TiN) or tantalum nitride (TaN) and having a thickness equal to or more than 3000 Å and equal to or less than 8000 Å on said intermediate layer; forming a metal lower electrode layer on said binder layer; forming a precursor containing copper (Cu), indium (In) and gallium (Ga) on said metal lower electrode layer; forming a p-type light absorbing layer made of a chalcopyrite compound on said metal lower electrode layer by adding selenium (Se) to said precursor and carrying out thermal processing at a temperature equal to or higher than 600 degrees C. and equal to or lower than 700 degrees C.; forming an n-type buffer layer on said light absorbing layer; and forming a transparent electrode layer on said buffer layer.