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LIGHT ABSORPTION LAYER, COMPOUND THIN FILM SOLAR CELL, MANUFACTURING METHOD OF LIGHT ABSORPTION LAYER, AND MANUFACTURING METHOD OF COMPOUND THIN FILM SOLAR CELL
LIGHT ABSORPTION LAYER, COMPOUND THIN FILM SOLAR CELL, MANUFACTURING METHOD OF LIGHT ABSORPTION LAYER, AND MANUFACTURING METHOD OF COMPOUND THIN FILM SOLAR CELL
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机译：吸光层，复合薄膜太阳电池，制造方法，复合薄膜太阳电池的制造方法
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摘要
PROBLEM TO BE SOLVED: To provide a light absorption layer capable of improving photoelectric conversion efficiency, a compound thin film solar cell, a manufacturing method of the light absorption layer, and a manufacturing method of the compound thin film solar cell.SOLUTION: The present invention relates to a light absorption layer 13 containing five elements of Cu, Zn, Sn, S and Se and used for a compound thin film solar cell 10. A rate of change of an S concentration in a film thickness direction of the light absorption layer 13 is 10% or less, and a rate of change of an Se concentration in the film thickness direction of the light absorption layer 13 is 10% or more and 30% or less. The Se concentration is increased from a surface directed to a back electrode 12 of the compound thin film solar cell 10 among surfaces that the light absorption layer 13 has, to a surface directed to a surface electrode 17 of the compound thin film solar cell 10, and a composition of the entire light absorption layer 13 satisfies 0.98≤(S+Se)/(Cu+Zn+Sn).SELECTED DRAWING: Figure 1
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