Effect of isomorphic atom substitution on the refractive index and oscillator parameters of TlInS_2xSe_2(1‐x) (0.25 ≤ x ≤ 1) layered mixed crystals

Abstract

The optical properties of TlInS 2x Se 2(1-x) mixed crystals (0.25 ≤ x ≤ 1) have been studied at room temperature through the transmittance and reflectivity measurements in the wavelength range of 400-1100 nm. The spectral dependence of the refractive index for all compositions of studied crystals were obtained. The dispersion of the refractive index is discussed in terms of the Wemple-DiDomenico single-effective-oscillator model. The compositional dependencies of refractive index dispersion parameters: oscillator energy, dispersion energy and zero-frequency refractive index were revealed.

Optical properties of tin sulphide (SnS) thin film estimated from transmission spectra

“…Similarly, in this work we have estimated the values of the refractive index (n) and the film thickness (d). The behaviour of obtained refractive index (n) can be described by the model of number of oscillation to calculate the single oscillation (E o ) and dispersion energy (E d ) [16][17][18] of the thin films. In this work we present systematic preparation of SnS in powder form and characterise the optical properties of SnS thin films deposited on ITO coated glass slide substrate using thermal evaporation techniques.…”

Structural and optical properties of tin (II) sulfide thin films deposited using organophosphorus precursor (Ph3PS)

“…The refractive index is a characteristic parameter of the semiconductor materials, related to the local field within the material. The estimated refractive index n for the tin sulfide films grown at different sulphidisation temperature, evaluated using expression (8) [57], were plotted in figure 11 as a function of wavelength in the range of 500-2500 nm.…”

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

“…The refractive indices, extinction coefficients, real and imaginary parts of dielectric function have been calculated from ellipsometric data. Moreover, the refractive index dispersion parameters: oscillator energy, dispersion energy and zero-frequency refractive index of TlGa(S 1-x Se x ) 2 , TlGa 1-x In x S 2 and TlIn(Se 1-x S x ) 2 mixed crystals have been reported [21][22][23].…”