Pure and aluminum doped ZnO transparent thin films were
prepared by spray pyrolysis. ZnO thin films are formed by decomposition
to ZnO. The aluminum doping, Al/Zn of 4/96, was achieved by the addition
of AlCl3 2H2O in methanol solution of the chemical
The films are transparent (> 80% optical transmission) in the near
UV, VIS and near IR ranges. X-ray diffraction analysis indicates that
the crystallites of both ZnO and ZnO:Al thin films are preferentially
oriented along the c-axis,  direction of the hexagonal compact structure
of type. The electric properties (electrical conductivity and electrical
mobility) and the optical property (transmittance) of aluminum doped ZnO
films have been measured. The results have been compared to those obtained
with undoped ZnO thin films. The doping modifies the structure and the
morphology of the obtained films and it increases the optical transmittance
and the electrical conductivity.
A. Alaeddine, I. Rachidi, F. Bahsoun, Y. Mohanna, O. Bazzi and F. El Haj Hassan, 2009. Influence of Al Dopant on the Optical and Electrical Properties
of Zinc Oxide Thin Films Prepared by Spray Pyrolysis. Journal of Applied Sciences, 9: 1588-1592.