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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 808-811 |
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Hossein F, souri D. Determination of the optical band gap of MoO3-V2O5-TeO2 glasses by DASF method. ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :808-811
URL: http://opsi.ir/article-1-2702-en.html
URL: http://opsi.ir/article-1-2702-en.html
Abstract: (722 Views)
In this research, the bulk samples of xMoO3-(60-x)V2O5-40TeO2 compositions with different molar contents of 0≤x≤60 were prepared by rapid melt-quenching method. To investigate the optical properties, the optical absorption spectra of samples were taken within the wavelength range of 190-1100 nm. Then, derivation of absorption spectrum fitting method (shortened as DASF) was used as precise approach to determine the band gap and the exact nature of charge carriers transition. Results show that the minimum optical band gap is equal to 2.38 eV for x = 10. In addition, some optical quantities such as the width of the band tails (Urbach energy), refractive index (n) and dielectric constant (ε) were obtained for the under studied glasses. Results imply that the TVM10 sample is the optimal sample for optical applications such as optical fibers.
Keywords: derivation of absorption spectrum fitting, optical band gap, Urbach energy, refractive index
Type of Study: Experimental |
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