Structural and Optical Properties of Znse1−Xtex Nanocrystalline Thin Films in Terms of Optical Spectroscopic Ellipsometry
Abstract
Polycrystalline thin films of ZnSe1−xTex (0.0 ≤ x ≤ 1.0) were deposited on glass substrate using electron beam deposition technique. The structure of the prepared films was examined using X-ray diffraction technique and revealed that the deposited films have polycrystalline zinc blend structure. The optical constants and film thicknesses of nanocrystalline ZnSe1−xTex films were obtained by fitting the spectroscopic ellipsometric data (ψ, Δ) using a three-layer model system in the wavelength range from 400 to 1100 nm. The refractive index was observed to increase with increasing Te concentration. This increase in the refractive index with increasing Te content may be attributed to the increase in the polarizability due to
the large ionic radius of Te compared to the ionic radius of Zn. The optical studies of the polycrystalline ZnSe1−xTex films showed that the refractive index increases and fundamental band gap opt g E decreases from 2.58 to 2.21 eV as the tellurium concentration increases from 0 to 1. Furthermore, it was also found that the variation of optical band gap with composition
shows quadratic behavior.
Keywords: ZnSe1−xTex thin film, nanocrystalline, Spectroscopic ellipsometry, bandgap.
Downloads
Published
How to Cite
Issue
Section
License
Declaration/Copyright transfer:
1. In consideration of the undertaking set out in paragraph 2, and upon acceptance by ANGLISTICUM for publication of the manuscript in the Journal, I/We hereby assign and transfer publication rights to ANGLISTICUM, whereas I/We retain the copyright for the manuscript. This assignment provides ANGLISTICUM the sole right and responsibility to publish the manuscript in its printed and online version, and/or in other media formats.
2. In consideration of this assignment, ANGLISTICUM hereby undertakes to prepare and publish the manuscript in the Journal, subject only to its right to refuse publication if there is a breach of the Author’s warranty in paragraph 4 or if there are other reasonable grounds.
3. Editors and the editorial board of ANGLISTICUM are empowered to make such editorial changes as may be necessary to make the Manuscript suitable for publication.
4. I/We hereby acknowledge that: (a) The manuscript submitted is an original work and that I/We participated in the work substantively and thus I/We hereby are prepared to take public responsibility for the work; (b) I/We hereby have seen and approved the manuscript as submitted and that the manuscript has not either been published, submitted or considered for publication elsewhere; (c) The text, illustration, and any other materials included in the manuscript do not infringe upon any existing copyright or other rights of anyone.
5. I/We hereby indemnify ANGLISTICUM and the respective Editors of the Journal as mentioned in paragraph 3, and hold them harmless from any loss, expense or damage occasioned by a claim or suit by a third party for copyright infringement, or any suit arising out of any breach of the foregoing warranties as a result of publication of the manuscript.
