Composition dependence of the structure and optical properties of Cu2MnxZn1−xSnS4 thin films

摘要: Abstract Cu 2 Zn 1− x Mn SnS 4 (CMZTS) thin films with composition controllability and tunable band gap have been firstly prepared by sol–gel technique followed a post-annealing treatment at 580 °С for 10 min in nitrogen gas atmosphere. Effects of variation CMZTS  = 0.0–1.0 on the morphological, structural, optical properties investigated. XRD Raman studies reveal incorporation into ZnSnS (CZTS) films, demonstrate structural transition from kesterite to stannite increasing content. SEM images show that compact, homogeneous densely packed grains could be formed. Furthermore, UV–vis spectroscopy indicate gaps can tuned almost linearly between 1.23 1.51 eV small bowing constant (∼0.10 eV), which confirms good miscibility alloyed constituents crystal lattice.