NOVELTY - The solar cell comprises a bearing substrate (100), a light absorption layer (300) containing chalcogenide particle (400) including group I element, a front electrode layer (700) arranged on the light absorption layer, a backsurface electrode layer (200) arranged on the bearing substrate, and a copper indium gallium selenium sulfur layer that is arranged on the backsurface electrode layer and includes sulfur compound. The chalcogenide particle including group I element has different distribution according to the position of the light absorption layer.    USE - Used as a solar cell such as dye-sensitized solar cell and organic compound solar cell.    ADVANTAGE - The solar cell exhibits long life span, excellent photovoltaic effect and high photelectric conversion efficiency and optical stability.    DETAILED DESCRIPTION - The solar cell comprises a bearing substrate (100), a light absorption layer (300) containing chalcogenide particle (400) including group I element, a front electrode layer (700) arranged on the light absorption layer, a backsurface electrode layer (200) arranged on the bearing substrate, and a copper indium gallium selenium sulfur layer that is arranged on the backsurface electrode layer and includes sulfur compound. The chalcogenide particle including group I element has different distribution according to the position of the light absorption layer. The chalcogenide particle reduces to the interface of the front electrode layer and the light absorption layer from the interface of the light absorption layer and backsurface electrode layer. The chalcogenide particle including group I element has a size of 100 nm to 0.5 mu m and a concentration of 0.01-0.1 wt.%. An INDEPENDENT CLAIM is included for a method for manufacturing a solar cell.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a solar cell.    Bearing substrate (100)    Backsurface electrode layer (200)    Light absorption layer (300)    Chalcogenide particle (400)    Buffer layer (500)    Front electrode layer. (700)