Thin film of CTS
was grown by sulfidation of Sn–Cu metallic precursors in a
S2 atmosphere at 520 C to form orthorhombic CTS thin film
with 1.60 eV band gap, reported by Fernandes et al.9) CTS
thin film was prepared by a spray pyrolysis technique and
followed by annealing at 550 C in an atmosphere containing
sulfur to form polycrystalline orthorhombic CTS thin film
which was determined its direct energy gap of 1.8 eV by
Chalapathi et al.10)