| 20120132281 | THIN-FILM SOLAR CELL AND MANUFACTURING METHOD THEREOF - A thin-film solar cell and a manufacturing method thereof are disclosed. The method of manufacturing the thin-film solar cell includes the steps of providing a substrate; forming a diffusion barrier layer on the substrate; forming a back electrode layer on the diffusion barrier layer; forming a precursor layer on the back electrode layer, and the precursor layer including at least Cu, In and Ga; providing an alkali layer on an upper surface of the precursor layer, and the alkali layer being formed of Li, Na, K, Rb, Cs, or an alkali metal compound; providing a selenization process for the precursor layer and the alkali layer to form an absorber layer, such that an atomic percentage concentration of the alkali metal in the absorber layer is ranged between 0.01%˜10%; forming at least a buffer layer on the absorber layer; and forming at least a front electrode layer on the buffer layer. | 05-31-2012 |
