All-inorganic and lead-free BiI 3 thin film solar cells by iodization of BiSI thin films …
Recently, the binary BiI3 semiconductor has emerged as a novel and potential absorbing material for thin film solar cells. In this work, high-quality BiI3 thin films are obtained by a two-step method via iodization of BiSI precursor thin films at low temperatures. The BiSI precursor solution is made via a Bi