INFLUENCE OF ROTATION RATE ON OPTICAL PROPERTIES OF ZnS THIN FILMS ANALYZED BY SPECTROSCOPIC ELLIPSOMETRY METHOD
Batool Ahmadi Khanegahi and
Hassan Sedghi ()
Additional contact information
Batool Ahmadi Khanegahi: Department of Physics, Urmia University, Urmia, Iran
Hassan Sedghi: Department of Physics, Urmia University, Urmia, Iran
Surface Review and Letters (SRL), 2020, vol. 27, issue 01, 1-7
Abstract:
In the present work, zinc sulfide thin films were deposited on glass substrates by sol–gel process with different coating speeds 3600, 4800, 6000 and 7200rpm. Zinc acetate (Zn(CH3COO)2⋅2H2O) and thiourea (CH4N2S) were used as precursors. Two-methoxyethanol and monoethanolamine were used as solvent and stabilizer, respectively. The optical properties of ZnS thin films such as refractive index, extinction coefficient, dielectric function and optical band gap energy of the films were obtained by spectroscopic ellipsometry (SE) analysis method in the wavelength range of 300–800nm. The incidence angle of the layers was kept at 70∘. The measured SE parameters Ψexp and Δexp are fitted against the designed model by minimizing the mean square error (MSE). Considering the data obtained, it can be deduced that the optical properties of ZnS films are highly influenced by rotation rates. The extinction coefficients of the films were increased with increasing rotation rates of the films. From these results, it is found that the energy gap of the ZnS films increases with increasing rotation rates of the films in the range of 3.13–3.20eV.
Keywords: Spectroscopic ellipsometry; rotation rate; thin film; zinc sulfide; optical properties (search for similar items in EconPapers)
Date: 2020
References: Add references at CitEc
Citations:
Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X19500926
Access to full text is restricted to subscribers
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:27:y:2020:i:01:n:s0218625x19500926
Ordering information: This journal article can be ordered from
DOI: 10.1142/S0218625X19500926
Access Statistics for this article
Surface Review and Letters (SRL) is currently edited by S Y Tong
More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().