Compositional dependence of refractive index and oscillator parameters in TlGaS2xSe2(1−x) layered mixed crystals (0 ≤ x ≤ 1)

Gasanly, Nizami

doi:10.1016/j.matchemphys.2012.06.064

Cited by 7 publications

(1 citation statement)

References 35 publications

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“…The s o , λ o and n ∞ of various treated temperatures of the GCNs samples are estimated by drawing the 1/(n 2 −1) against (1/λ 2 ), figure 10 and tabulated in table 1. To calculate the average inter-band oscillator wavelength (λ o ) and long-wavelength refractive index (n ∞ ), the average oscillator strength, for the PG and GCNs samples that heat treated at different temperatures, the equation for the single oscillator model was regarded as [34,37]…”

Section: Optical Propertiesmentioning

confidence: 99%

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na₂O-GeO₂-MnO₂ for optoelectronic and optical limiting applications

Morad,

Harby,

Ali

et al. 2023

Phys. Scr.

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Manganese (IV) ion has been deemed a functional non-rare-Earth activator for the generation of red emissions, while the oxide and fluoride hosts that provide suitable sites for Mn4+ have to be prepared with usually rigorous control of reaction conditions, including redox equilibrium and temperature. In this study, the parent glass with 20Na2O- 80GeO2- 0.1 MnO2, in mol% composition is prepared via conventional melt-quenching, and the devitrification of the glass is induced by thermal treatment. The capability of appropriate thermal treatment to transform glasses into glass-ceramic nanocomposites (GCNs) with crystallites smaller than 21 nm was confirmed by XRD measurements. An enhancement in the optical characteristic of the GCNs is induced owing to the modifications in the microstructure. Tauc’s and ASF models were used to calculate the direct allowed transition energy. Localized states in the forbidden region cause the decrease in the glass ceramic’s bandgap (E g opt), as illustrated by the Urbach energy (Eu) values. Optical absorption parameters and the relation between transition energy and refractive index (n) were investigated. The increase in heat treatment temperature induces an improvement in the nonlinear (X(3)) susceptibility and (n(2)) refractive parameters. The synthetic method demonstrated here for Na2Ge4O9:Mn4 + might be extended for the synthesis of other phosphors-containing activators with a high oxidation state. Moreover, Optical Cut-Off characteristics (OCC) revealed that the sample reduces the light transmission intensity by higher heat treatment temperature. The results suggest that 540° heat-treated samples are encouraging materials in a variety of optoelectronics applications, and mainly optical apparatus.

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Section: Optical Propertiesmentioning

confidence: 99%

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na₂O-GeO₂-MnO₂ for optoelectronic and optical limiting applications

Morad,

Harby,

Ali

et al. 2023

Phys. Scr.

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Optical properties of $$\hbox {TlGa}(\hbox {S}_{{x}}\hbox {Se}_{1-x})_{2}$$ TlGa ( S x Se

Gasanly

2018

Pramana - J Phys

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Composition dependence of lattice parameters and band gap energies of thallium based layered mixed crystals

Gasanly

2014

Indian J Phys

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Compositional dependence of lattice parameters and unit cell volumes of TlMeX 2 -type (Me = Ga or In and X = S or Se) layered mixed crystals with monoclinic structure has been studied by X-ray diffraction technique. It is revealed that the lattice parameters of TlGa 1-x In x Se 2 , TlGa(S 1-x Se x ) 2 , TlGa 1-x In x S 2 and TlIn(Se 1-x S x ) 2 mixed crystals increase due to the substitution of gallium atoms by indium and sulfur atoms by selenium. Moreover, the absorption edges of these mixed crystals have been investigated through the transmission and reflection measurements in the wavelength range of 400-1,100 nm. The analysis of absorption data has revealed the presence of both optical indirect and direct transitions. It is found that the energy band gaps of mixed crystals decrease due to the substitution of gallium atoms by indium and of sulfur atoms by selenium.

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Compositional dependence of refractive index and oscillator parameters in TlGaS2xSe2(1−x) layered mixed crystals (0 ≤ x ≤ 1)

Cited by 7 publications

References 35 publications

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na₂O-GeO₂-MnO₂ for optoelectronic and optical limiting applications

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na₂O-GeO₂-MnO₂ for optoelectronic and optical limiting applications

Optical properties of $$\hbox {TlGa}(\hbox {S}_{{x}}\hbox {Se}_{1-x})_{2}$$ TlGa ( S x Se

Composition dependence of lattice parameters and band gap energies of thallium based layered mixed crystals

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Compositional dependence of refractive index and oscillator parameters in TlGaS2xSe2(1−x) layered mixed crystals (0 ≤ x ≤ 1)

Cited by 7 publications

References 35 publications

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na2O-GeO2-MnO2 for optoelectronic and optical limiting applications

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na2O-GeO2-MnO2 for optoelectronic and optical limiting applications

Optical properties of $$\hbox {TlGa}(\hbox {S}_{{x}}\hbox {Se}_{1-x})_{2}$$ TlGa ( S x Se

Composition dependence of lattice parameters and band gap energies of thallium based layered mixed crystals

Contact Info

Product

Resources

About

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na₂O-GeO₂-MnO₂ for optoelectronic and optical limiting applications

Tunable emission glass ceramic nanocomposites via devitrification of glassy Na₂O-GeO₂-MnO₂ for optoelectronic and optical limiting applications