Calculation of Current Density—Voltage Curve for Thin‐Film Cu(In,Ga)Se2 Solar Cells

We have developed a theoretical model for thin‐film Cu(In,Ga)Se2 (CIGS) solar cells with distributed series resistances and non‐negligible internal reflection. The current density—voltage (J‐V) curve of high‐efficiency solar cells does not change significantly for various distribution of series resistance, if its mean value is fixed. On the other hand, the influence of internal reflection on the J‐V curve is not negligible for a CIGS solar cell which has a submicron‐thick CIGS absorber with a small recombination velocity at the rear of the absorber.