Scopus
YÖKSİS DOI Eşleşti
SJR Q1
Thickness dependence of dispersion parameters of the MoOx thin films prepared using the vacuum evaporation technique
Journal of Alloys and Compounds · Haziran 2015
YÖKSİS Kayıtları
Thickness dependence of dispersion parameters of the MoOx thin films prepared using the vacuum evaporation technique
Journal of Alloys and Compounds · 2015 SCI-Expanded
Dr. Öğr. Üyesi ÜMMÜHAN AKIN →
Thickness dependence of dispersion parameters of the MoOx thin films prepared using the vacuum evaporation technique
Journal of Alloys and Compounds · 2015 SCI-Expanded
Prof. Dr. HALUK ŞAFAK →
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Thickness dependence of dispersion parameters of the MoOx thin films prepared using the vacuum evaporation technique
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Makale Bilgileri
ISSN09258388
Yayın TarihiHaziran 2015
Cilt / Sayfa647 · 146-151
Scopus ID2-s2.0-84933501413
Özet
The optical behaviors of molybdenum oxide thin films are highly important due to their widespread applications. In the present paper, the effect of thickness on the structure, morphology and optical properties of molybdenum oxide (MoOx) thin films prepared on Corning glass substrates using thermal evaporation technique was studied. The structure and morphology of films were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively, while their optical properties were investigated by UV-VIS-NIR spectrophotometry in the spectral range from 300 to 2500 nm. It was observed that whole films have amorphous structure and also they showed rather high transmittance values reached nearly up to 90%. Absorption analysis showed two types of electronic transitions; both direct and indirect interband transition energy values of films decrease from 4.47 to 3.45 eV and from 3.00 to 2.75 eV, respectively, with increasing the film thickness, while the width of the localized states tail increases with thickness. This decrease in the band gap value can be attributed to the rising oxygen-ion vacancy densities with the thickness. The refractive indices of films were calculated from Sellmeier coefficients determined by nonlinear curve fitting method based on the measured transmittance spectral data. The dispersion of the refractive index was discussed in terms of the Wemple-DiDomenico single-oscillator model. The dispersion parameters such as average oscillator energy, Eo, the dispersion energy, Ed, and static refractive index no were evaluated and they found to vary significantly with the film thickness.
Yazarlar (2)
1
Ümmühan Akın
2
Haluk Şafak
Anahtar Kelimeler
Dispersion analysis
Molybdenum oxide thin films
Optical constants
Kurumlar
Selçuk Üniversitesi
Selçuklu Turkey
Scimago Dergi (ISSN Eşleşmesi)
Journal of Alloys and Compounds
Q1
SJR Skoru1,079
H-Index251
YayıncıElsevier B.V.
ÜlkeNetherlands
Materials Chemistry (Q1)
Mechanical Engineering (Q1)
Mechanics of Materials (Q1)
Metals and Alloys (Q1)
Metrikler
29
Atıf
2
Yazar
3
Anahtar Kelime