THE STUDY OF THE EFFECT OF ANNEALING ON OPTICAL PROPERTIES TO CUALS2 THIN FILMS

Abstract

In this research the study of optical properties for thin films of (CuAlS2) Compound , has beenCarried out in sintered temperature (360)C0 . using heat spray method. The effect of substituted Sodiumelement and annealing at temperatures (250 , 300 , 350 , 400) C0 for two hours has bean studied, the effect ofheat neutrons irradiation at doses (3.024*10 9, 4.752*109 , 6.48*109)n.cm-2 has also been shown.Opticalconstant have also been measured by the absorption and permeability spectrum in wavelength rang (300-1000)nm .such a procedure will eables finding many parameters, such as Coefficient of optical absorption ,which found to be grater then (105) for all films , allowed of electrons transation , Limit of absorbiption will beshift to highest long wave depending on substituted ,annealing or irradiation limt of optical absorpition found tofull is the range between (540-590)nm . The value of energy gap for (CuAlS2) thin films found to be (3.2)eV .This value has been increased with annealing and irradiation by neutrons and become (3.25.2.3,3.4,3.5) eV,respectively according to the above values of energy gaps (3.28,3.4,3.48) eV substituted Sodium element in(CuAlS2) at (1-5)wt%. This causes reduction in energy gap, and that reduction was (3.2) eV for unsubstitutedcompound and (2.85) eV for substituted with (5)wt% ratio