Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5438049 | Ceramics International | 2017 | 8 Pages |
Abstract
Bi-based chalcogenides, in the form of thin crystalline films, were deposited at different thicknesses onto highly cleaned glass slides with the aid of vacuum thermal evaporation technique. The influence of thermal annealing on the optical properties of Bi2Te3-Bi2Se3 films at different thicknesses is investigated in this work. Wavelength dependence of the optical transmittance and reflectance was recorded, for the as-prepared and the annealed films, in the wavelength range from 350 to 2700Â nm using a double beam spectrophotometer. Fundamental optical properties such as absorption coefficient and energy band gap were derived based on the measured spectra and film's thickness. We demonstrate in the present work that the synergy of annealing and thickness reduction can be exploited for light transmittance enhancements, and consequently for optoelectronic applications including transparent conductive electrodes.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A.M. Adam, P. Petkov,