Chalcogenides such as CdTe, Cu (In, Ga)(S, Se) 2 (CIGSSe), and Cu2ZnSn (S, Se) 4
(CZTSSe) have enabled remarkable advances in thin-film photovoltaic performance, but
concerns remain regarding (i) the toxicity (CdTe) and (ii) scarcity (CIGSSe/CdTe) of the
constituent elements and (iii) the unavoidable antisite disordering that limits further efficiency
improvement (CZTSSe). In this work, we show that a different materials class, the
BaCu2SnSe x S4–x (BCTSSe) system, offers a prospective path to circumvent difficulties (i …

… The exact identity of V1, V2, and V3 at each point is defined in Figure S6. The direction is …
Light current density-voltage characteristics of a BaCu2SnS4 thin film solar cell with …