Fe1 S2

Fe1S2 (iron disulfide, also known as pyrite or marcasite in its natural forms) is a semiconductor compound belonging to the metal sulfide family, characterized by iron bonded to sulfur in a 1:2 stoichiometric ratio. This material has gained significant research interest for photovoltaic and optoelectronic applications due to its narrow bandgap and Earth-abundant constituent elements, offering a potentially low-cost alternative to conventional semiconductors like silicon or cadmium telluride. Engineers consider Fe1S2 primarily for next-generation solar cells and photoelectrochemical devices where cost reduction and sustainability are critical drivers, though the material remains largely in the research and development phase compared to established commercial semiconductors.