a-(Sb2Se3) 100− xSnx thin films with temperature have been studied. It is found that the
thermal activation energy decreases, while the optical gap first increases (up to x= 1) and
then decreases, with the increase in Sn content. These results have been explained by
taking into consideration the structural modifications induced by the incorporation of Sn into
the parent alloy. The variation in the conductivity prefactor (σo) with Sn addition indicates a …