Influence of composition on the structure and optoelectronic properties of Pb_xIn_{25-x}Se_{75} thin films

Authors

HESHAM AZMI ELMELEEGI
ZEINAB EL SAYED EL MANDOUH
AHMED ABDEL MOEZ

DOI

10.3906/fiz-1306-9

Abstract

Pb_xIn_{25-x}Se_{75} thin films with 2 compositions were prepared by thermal evaporation. The surface topography of these films was studied by transmission electron microscope. The optical reflectance and transmittance were studied in order to determine the optical parameters such as optical energy gap, refractive index, extinction coefficient, dielectric loss, and dielectric tangent loss for these films. A single oscillator theory equation was applied for these films in order to determine both dispersion energy and oscillating energy, and the ratio of free carrier concentration/effective mass (N/m*) was determined optically. It was found that change in the composition of these films affects strongly all their optical and dielectric results.

Keywords

Thin films, structure, optical properties, dielectric loss, optical conductivity, optical switching

First Page

145

Last Page

154

Recommended Citation

ELMELEEGI, HESHAM AZMI; MANDOUH, ZEINAB EL SAYED EL; and MOEZ, AHMED ABDEL (2014) "Influence of composition on the structure and optoelectronic properties of Pb_xIn_{25-x}Se_{75} thin films," Turkish Journal of Physics: Vol. 38: No. 1, Article 18. https://doi.org/10.3906/fiz-1306-9
Available at: https://journals.tubitak.gov.tr/physics/vol38/iss1/18