Strontium-doped ZnO films have been grown by pulsed laser deposition on different substrate, mainly sapphire (0001).  The doping was achieved by utilizing targets of (SrO)_x­ (ZnO)_1-x mixtures in the ZnO rich regime, having SrO up to 25%.  The films were examined by different techniques to investigate the structural and optical properties.  The main orientation of the film, indicated by XRD, is (001); however, other peaks of (100) and (101) were observed for higher Sr contents.  Under certain growth conditions, the main peak was noticed to be apparent for even high Sr content, yet the peak intensity was decreasing as Sr increases.  This in fact suggests the reduction of the grain size, induced by Sr. Moreover, the existence of other orientation, even though they are small, might be attributed to the change of the surface energies due to Sr incorporation.  Optical measurements of different samples by spectrophotometer and ellipsometer exhibit variation of the index of refraction in the transparent regime as strontium concentration changes in the targets.  Other analysis such as RBS measurements and HRTEM are being carried out to inspect the effect of SrO ratio (x), in targets, on the film structural properties and correlate that to the resultant optical properties.  Funding is provided by Saudi National Plan for Science and Technology; the project # is NAN1197.

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