Thickness Dependent Optical Properties of Thermally Evaporated SnS Thin Films

Nwofe, P. A.; Reddy, K.T. Ramakrishna; Tan, John; Forbes, Ian; Miles, Robert

doi:10.1016/j.phpro.2012.03.064

Cited by 51 publications

(18 citation statements)

References 8 publications

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“…The decrease of extinction coefficient with increasing wavelength shows that the fraction of light lost due to scattering and absorbance decreases. It was also observed that the extinction coefficient decreases at the onset probably due to the effect of free carrier absorption [40]. The decrease in the extinction coefficient denotes the decrease in the loss energy (e i ) with Ag content [38] , which is consistent with the result of other workers [28,41].…”

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confidence: 88%

Composition dependence of the optical constants of amorphous (Se₈₀Te₂₀)_100−xAg_x (0 ≤ x ≤ 4) films

Singh

Kumar

Anand

et al. 2013

Physica Status Solidi (a)

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This paper reports the influence of silver (Ag) addition on the optical constants of chalcogenide (Se 80 Te 20 ) 100Àx Ag x (0 x 4) thin films. Films of (Se 80 Te 20 ) 100Àx Ag x (0 x 4) glasses were prepared by thermal evaporation of the bulk samples. The transmittance and reflection spectra of amorphous thin films were obtained in the spectral region in the range 400-2500 nm. The optical band gap and the absorption coefficient were calculated from the transmission and reflection data. Swanepoel method has been applied to derive the real and imaginary parts of the complex index of refraction, refractive index, and also the thickness of amorphous films. The dispersion parameters are calculated by using the WempleDiDomenico model. The optical constants, i.e., the refractive index, extinction coefficient, absorption coefficient, and optical band gap are determined and their compositional dependence is considered. The results are discussed on the basis of defects and disorders present in chalcogenide systems.

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confidence: 88%

Composition dependence of the optical constants of amorphous (Se₈₀Te₂₀)_100−xAg_x (0 ≤ x ≤ 4) films

Singh

Kumar

Anand

et al. 2013

Physica Status Solidi (a)

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“…26 The dispersion energy, optical spectra moments and the dielectric constant were all found to decrease with increase in SnS thin lm's thicknesses. 27 The number of layers (thickness) can manipulate the electronic properties of Mo and W based TMDs, where an increase in bandgap was observed with decrease in thickness from bulk to monolayers. 28 Energy gap and refractive index were reported to vary with thickness of CdI 2 lms in ref.…”

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confidence: 99%

Visible region absorption in TMDs/phosphorene heterostructures for use in solar energy conversion applications

Maniyar

Choudhary

2020

RSC Adv.

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“…From the absorbance and transimatance versus wavelength measurements the energy bandgap of the layers were deduced. The energy band gap was calculated using the relation [74][75][76];…”

Section: Optical Analysismentioning

confidence: 99%

Effect of Dip Time on the Structural and Optical Properties of Chemically Deposited CdSe Thin Films

Chikwenze¹,

Nwofe²,

Agbo³

et al. 2015

IJMSA

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In this study, the effect of dip time on the structural and optical properties of cadmium selenide (CdSe) thin films grown by the chemical bath deposition method is reported. The films were grown with varying dip time in the range of 4 h to 12h, and the other deposition variables (substrate temperature, source to substrate distance, pH, and concentration) were kept constant. X-ray diffractometry (XRD) and optical spectroscopy were used to characterise the layers. The results show that the crystallite size and the film thickness increased with an increase in the dip time up to a "critical value" and then decreased otherwise for the latter. The increase in the crystallite size was more pronounced at the lower dip time (< 8 h), and then exhibited a marginal increase for dip time > 8 h. The energy band gap was found to be direct with an optimum value of 1.2 eV obtained for films grown at a dip time of 8 h.

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Thickness Dependent Optical Properties of Thermally Evaporated SnS Thin Films

Cited by 51 publications

References 8 publications

Composition dependence of the optical constants of amorphous (Se₈₀Te₂₀)_100−xAg_x (0 ≤ x ≤ 4) films

Composition dependence of the optical constants of amorphous (Se₈₀Te₂₀)_100−xAg_x (0 ≤ x ≤ 4) films

Visible region absorption in TMDs/phosphorene heterostructures for use in solar energy conversion applications

Effect of Dip Time on the Structural and Optical Properties of Chemically Deposited CdSe Thin Films

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Thickness Dependent Optical Properties of Thermally Evaporated SnS Thin Films

Cited by 51 publications

References 8 publications

Composition dependence of the optical constants of amorphous (Se80Te20)100−xAgx (0 ≤ x ≤ 4) films

Composition dependence of the optical constants of amorphous (Se80Te20)100−xAgx (0 ≤ x ≤ 4) films

Visible region absorption in TMDs/phosphorene heterostructures for use in solar energy conversion applications

Effect of Dip Time on the Structural and Optical Properties of Chemically Deposited CdSe Thin Films

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Composition dependence of the optical constants of amorphous (Se₈₀Te₂₀)_100−xAg_x (0 ≤ x ≤ 4) films

Composition dependence of the optical constants of amorphous (Se₈₀Te₂₀)_100−xAg_x (0 ≤ x ≤ 4) films