CdS film grown on glass or ITO substrate is hexagonal phase.
Zn element has been successfully doped into lattice of CdS.
(002) of CdS:Zn film shifts to a higher angle with increase of Zn concentration.
The optical band gap of CdS:Zn films is bigger than that of pure CdS film.
Suitable Zn doping can improve the electrical conductivity.