| 摘要 |
PROBLEM TO BE SOLVED: To provide a CIGS solar cell including a CIGS layer with the excellent characteristics and a manufacturing method for the same.SOLUTION: The CIGS solar cell includes a substrate 1, a back electrode layer 3, a CIGS light absorption layer 4, a buffer layer 5, and a transparent electrode 6 in this order. The CIGS light absorption layer 4 includes a first light absorption layer 4a formed on the substrate 1 side, and a second light absorption layer 4b formed on the first light absorption layer 4a. The average grain size Nof the crystal grains included in the second light absorption layer 4b is smaller than the average grain size Nof the crystal grains included in the first light absorption layer 4a. The coverage of the second light absorption layer 4b relative to the first light absorption layer 4a is in the range of 40% or more and 90% or less.SELECTED DRAWING: Figure 1 |
