Formation of pyrite thin films by sulfidation annealing of iron films

摘要

Iron films deposited by magnetron sputtering on glass substrates were converted into FeS_2 films by sulfidation during isothermal annealing at 400degC. The formation of FeS_2 microscrytalline has been investigated under different annealing times. The conversion of Fe→FeS_2 may occur during annealing for 1 h. The grain size and the amount of FeS_2 phase significantly increase with the annealing time. However, the crystallization rate indicates an insignificant rise when the annealing time is longer than 10 h. The iron films can be substantially converted into FeS_2 thin films which have an approxiamate stochiometric composition under the condition of sulfidation annealing from 20 h to 30 h.