  Good quality In2S3 films were grown by Dr Blade method from a powder
synthesized in a chemical bath, and oxidized to obtain In2O3 films and films of
intermediate composition. The oxidation process and kinetics are studied by
means of thermogravimetric analysis, which shows complex phenomena. The study
is completed by scanning electron microscopy and EDX measurements. X-ray
diffraction and UV-visible spectroscopy results are also shown. The oxidation
process begins significantly above 420 C, and it appears that at least one
intermediate crystal phase takes place in the solid solution, suggesting that
the replacement of sulfur by oxygen atoms occurs at different temperatures in
the different crystallographic sites. The obtained samples show a band gap
varying continuously between 1.94 eV and 3.72 eV.
