Abstract
The effect of thermal annealing temperature on both structural and optical properties of amorphous As47.5Se47.5Ag5 thin films was studied. The XRD studies showed that the crystallinity of the studied films is improved by increasing the annealing temperature. Furthermore, the crystallite size increase whereas dislocation density and strain decrease with increasing the annealing temperature. The optical constants of the as-prepared and annealed As47.5Se47.5Ag5 thin films were calculated using the envelope method. The optical absorption data of these films was successfully described by Tauc's relation. The optical absorption mechanism was found to follow the allowed direct and indirect transitions. In addition, it was found that the optical band gap decreases while band width Ee increases as the annealing temperature increases. The data of the refractive index n was analyzed and discussed in terms of the single oscillator model proposed by Wemple-DiDomenico. Besides that, the non-linear optical parameters χ(1), χ(3) and n2 were determined as a function of the annealing temperature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
