دراسة تأثير السمك على الخواص البصرية لأغشية اوكسيد الالمنيوم (A1203) الرقيقة المحضرة بطريقة التحلل الكيميائي الحراري

Abstract

Thin transparent film of AlzOs has been prepared on borosilicate glassusing chemical spray pyrolysis technique.Absorptance and transmittance spectra have been recording inthe wave lengths arrange (350-900) nm. In order to study theconstants optical such as:Reflectance(R), refractive index(no),extinction coefficient(ko),real and imaginary parts of the dielectric constant and opticalconductivity(o) .The forbidden energy gap for both direct andindirect transitions has been calculated it was found that theenergy gap decreased as the film thickness increased.