A High Efficiency Electrodeposited Cu2ZnSnS4 Solar Cell

High‐performance Cu₂ZnSnS₄ photovoltaic devices are demonstrated using electrodeposition of metal stacks and annealing of a CuZnSn precursor in a sulfur atmosphere. A champion electroplated Cu₂ZnSnS₄ solar cell achieves a power conversion efficiency of 7.3%, which is a record efficiency for electrodeposited Cu₂ZnSnS₄ solar devices. The device performance points to electrodeposition and annealing as a low‐cost and viable approach to earth‐abundant solar cell fabrication.