The Influence of Aluminum Doping on Structural and Optical Properties of (Bi2O3)Thin Films

Abstract

In this research, the structural and optical properties were studied for Bi2O3 and Bi2O3:Al thin films with different doping ratios ( 1, 2, 3 ) % , which were prepared bythermal evaporation technique under vacuum , with thickness ( 450 ± 20 ) nm depositedon glass substrates at room temperature ( 300 ) K , Structural measurements by ( XRD)techniques demonstrated that all samples prepared have polycrystalline structurewith tetragonal structure and a preferred orientation [ 201 ] the optical measurementshows that all films have a direct energy gap , and in general decrease with theincrease of doping ratio except ratio ( 3% Al ) .The optical constant such as absorption coefficient , extinction coefficient , refractive indexreal and imaginary parts of the dielectric constant and optical conductivity werecalculated before and after doping with the range of wave lengths ( 300 - 1100 ) nm .