CuZnInSe₃‐based solar cells: Impact of copper concentration on vibrational and structural properties and device performance

CuZnInSe 3 (CZISe) is an interesting alternative for the acknowledged Cu(In,Ga)Se 2 absorber layer in thin film solar cells. While the partial replacement of scarce and expensive indium and gallium by zinc decreases manufacturing costs, the solid solution between CuInSe 2 and ZnSe opens interesting options for band gap tuning and grading. Its potential as an absorber layer in photovoltaic devices has been demonstrated by obtaining 7.4 and 7.6 %...