LIGHT ABSORPTION LAYER FOR SOLAR CELL, MANUFACTURING METHOD OF THE SAME, AND SOLAR CELL INCLUDING THE LIGHT ABSORPTION LAYER FOR SOLAR CELL

摘要

PROBLEM TO BE SOLVED: To provide a solar cell including a new CIGS-based light absorption layer with an improved photoelectric conversion efficiency of photovoltaic power and a solar cell including the CIGS-based light absorption layer.SOLUTION: The light absorption layer for a solar cell is obtained by using a sputtering target including Cu, In, Ga, and Se. The light absorption layer includes Cu, In, Ga, and Se. An atomic ratio of Cu to a sum of In and Ga is greater than or equal to 0.67 and less than or equal to 0.87.SELECTED DRAWING: None