X-ray photoelectron spectroscopic studies on Se/As2S3 and Sb/As2S3 nanomultilayered film

Naik, Ramakanta; Adarsh, K. V.; Ganesan, R.; Sangunni, K. S.; Kökényesi, S.; Deshpande, Uday; Shripathi, T.

doi:10.1016/j.jnoncrysol.2009.05.064

Cited by 14 publications

(5 citation statements)

References 12 publications

(12 reference statements)

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“…The required core level XPS spectra were taken by Al K α X-rays (1486.6 eV) under a vacuum of 2 × 10 −9 Torr. Due to the insulating nature of the prepared glassy films, the required charge correction was done with the recorded C1s binding energy (BE) as compared to the standard C1s of 284.6 eV (Barr and Seal 1995;Naik et al 2009). The original BE data correction was done by using the calibration factor.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Investigation of amorphous-crystalline transformation induced optical and electronic properties change in annealed As50Se50 thin films

Sahoo¹,

Priyadarshini²,

Dandela³

et al. 2021

Opt Quant Electron

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The present work reports the amorphous-crystalline phase transformation in thermally evaporated As 50 Se 50 thin films upon annealing at below T g (423 K) and above T g (523 K). The structural transition was probed by XRD, Raman and X-ray photoelectron spectroscopy. The composition and surface morphology were probed by EDS and FESEM techniques. The transmittance and reflectance spectra over the wavelength range 500 nm-1200 nm were used to deduce the optical parameters. The various optical parameters of the as-prepared and annealed As 50 Se 50 thin films were estimated and discussed in terms of density of defect states and disorders. The indirect optical energy gap decreased for the 423 K annealed film and abruptly increased for 523 K annealed film as compared to the as-prepared film. The Swanepoel envelope method, WDD model, and Sellemeire postulates were employed for the analysis of refractive index, static refractive index, oscillator energy, dispersion energy, oscillator wavelength and dielectric constant. The changes in the linear and nonlinear properties showed opposite behavior for the two annealed films. The non-linear refractive index and 3rd order susceptibility were found to be increased for 423 K annealed film and decreased for the 523 K annealed film. The optical as well as the electrical conductivity changed with annealing and the electrical susceptibility increased for 523 K annealed film. The tunable optical properties can be applied for several optoelectronic applications.

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Section: Experimental Techniquesmentioning

confidence: 99%

Investigation of amorphous-crystalline transformation induced optical and electronic properties change in annealed As50Se50 thin films

Sahoo¹,

Priyadarshini²,

Dandela³

et al. 2021

Opt Quant Electron

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“…As shown in Figure 7 c, the binding energy peaks of the Sb element before and after the exposure of the 0.5 wt.% SbCl 3 -coated test papers were 539.3 eV and 529.9 eV, respectively, indicating that the Sb element always existed in the form of Sb (III) [ 28 ]. The exposed test paper showed binding energy peaks of 161.6 eV and 162.8 eV, indicating that SbCl 3 and H 2 S reacted to form Sb 2 S 3 [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

A Visual Color Response Test Paper for the Detection of Hydrogen Sulfide Gas in the Air

Zhang

Zheng

et al. 2023

Molecules

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Hydrogen sulfide (H2S) is widely found in oil and natural gas wells and industrial wastewater tanks. Owing to its high toxicity, the monitoring and detection of H2S in the air is essential. However, recent techniques for the quantitative detection of H2S gas suffer from limitations such as high cost, complicated operation, and insufficient sensitivity, preventing their practical application in industry. Thus, we have developed a portable test paper for real-time and inexpensive monitoring of H2S gas by color changes. The test paper had a significantly low H2S detection limit of 200 ppb, which is considered safe for humans. Moreover, the color of the test paper did not change noticeably when exposed to CO2, N2, O2, and air environments, indicating that the test paper is selective for H2S gas and can be stored for a long time. In addition, we fitted a color difference linear model between the color difference values (ΔE) and the concentrations of H2S gas. The establishment of the linear model substantiates that the test paper can provide accurate intensity information when detecting H2S gas leakage.

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“…The Se 3d peak shifts from 55.60 eV (Sb 10%) to 54.3 eV (Sb 40%) due to the formation of Sb-Se bonds. This is because the electro negativity of Se (2.55) is more than that of Sb (2.08) [49]. As the S% remains constant in all the compositions, the S 2p peak intensity should remain the same.…”

Section: Discussionmentioning

confidence: 98%

Effect of compositional variations on the optical properties of Sb Se60-S40 thin films

Naik

Ganesan

2015

Thin Solid Films

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X-ray photoelectron spectroscopic studies on Se/As2S3 and Sb/As2S3 nanomultilayered film

Cited by 14 publications

References 12 publications

Investigation of amorphous-crystalline transformation induced optical and electronic properties change in annealed As50Se50 thin films

Investigation of amorphous-crystalline transformation induced optical and electronic properties change in annealed As50Se50 thin films

A Visual Color Response Test Paper for the Detection of Hydrogen Sulfide Gas in the Air

Effect of compositional variations on the optical properties of Sb Se60-S40 thin films

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