OPTICAL PROPERTIES AND FORMING MECHANISM OF CdZnS THIN FILM GROWN BY CHEMICAL BATH DEPOSITION

Ternary semiconductor CdZnS films were prepared by chemical doping of CdS with different concentration of Zn ion in a chemical bath deposition (CBD). We have analyzed the optical transmission and absorption properties of samples prepared by chemical bath deposition. The competition mechanism of Zn(2+) and Cd(2+) with the complexing agent NH(3) to forming the complex play a critical role in the forming of Cd(x)Zn(1-x)S thin film. In addition, the optical properties of the films with mixed phases were further investigated, the composition of CdZnS were determinated. Moreover, the influence of Zn(2+) concentration on the forming mechanism of the CdZnS thin film was discussed. In general, Zn(2+) play a key role during the process of regulating the growth rate and forming the ternary semiconductor CdZnS films by CBD.