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Effect of Annealing Temperature on the Structural and Optical Properties of Nanocrystalline Strontium Titanate Thin Film Prepared by PLD

Abstract

The study was carried out by the preparing of SrTiO3 thin films and studying the effect of annealing temperatures at (723, 773, 823) k for 2h on structural and optical properties. The SrTiO3 thin films have been prepared by pulse laser deposition in a vacuum condition at about (4×10-2) mbar. X-ray diffraction pattern of the films confirmed that all the grown films have polycrystalline structure rather increase in average grain size with increase temperature from7.03nm to9.25nm. The optical measurements show that the SrTiO3 thin films have direct energy gap which show that energy gap decrease from 3.7eV to 3.4 eV with increasing the annealing temperature, the transmittance decrease with increasing temperature.

Eman M. Abid Dr.Inaam M.Abdulmajeed, Dr.Kadhim A. Aadim

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