Thermodynamic model and Raman spectra of BaO-B2O3 glasses

Hruška, Branislav; Осипов, А. А.; Осипова, Л. М.; Chromčíková, Mária; Macháček, Jan; Liška, Marek

doi:10.1016/j.vibspec.2019.102970

Cited by 13 publications

(8 citation statements)

References 35 publications

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“…ITO/SiO 2 substrate, the surface was quite rough and the intense Raman peak at 503 cm À1 was because of Ba oxides and/or Si gels. [79,80] These results indicate the Ba and Si atoms react with O atoms from the ITO layer. In contrast, the surface of the sample formed on the TiN/SiO 2 substrate was smooth and the Raman peaks originating from the Si tetrahedra in the BaSi 2 lattice confirm formation of a BaSi 2 film.…”

Section: Basi 2 Films On Glass Substratesmentioning

confidence: 92%

Recent Progress Toward Realization of High‐Efficiency BaSi₂ Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Suemasu

Мигас

2021

Physica Status Solidi (a)

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Safe, stable, and earth-abundant materials for solar cell applications are of particular importance to realize a decarbonized society. Semiconducting barium disilicide (BaSi 2 ), which is composed of nontoxic and earth-abundant elements, is an emerging material to meet this requirement. BaSi 2 has a bandgap of 1.3 eV that is suitable for single-junction solar cells, a large absorption coefficient exceeding that of chalcopyrite, and inactive grain boundaries. This review is started by describing the recent progress of BaSi 2 thin-film deposition techniques using radio-frequency sputtering and discuss the high photoresponsivity of BaSi 2 thin films. Special attention is paid to passivation of the defects in BaSi 2 films by hydrogen or carbon doping. Ab initio studies based on density-functional theory are then used to calculate the positions of the localized defective states and the Fermi level to discuss the experimentally obtained passivation effects. Finally, the issues that need to be resolved toward realization of high-efficiency BaSi 2 solar cells are addressed.

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Section: Basi 2 Films On Glass Substratesmentioning

confidence: 92%

Recent Progress Toward Realization of High‐Efficiency BaSi₂ Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Suemasu

Мигас

2021

Physica Status Solidi (a)

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“…[25][26][27] We see the change in color and aggregates on the surface of sample ITO- O atoms from the ITO underlayers. We ascribed this Raman line to substances such as Ba oxides 35) and Si gel. 36) In sample ITO-5 (TS = 600 °C), there was no Raman line related to BaSi2.…”

Section: Mbe Is a Very Powerful Technique To Conduct Fundamental Studies Such As The Effect Ofmentioning

confidence: 99%

Fabrication of high-photoresponsivity BaSi₂films formed on conductive layers by radio-frequency sputtering

Koitabashi

Nemoto

Mesuda

et al. 2020

Appl. Phys. Express

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We fabricated randomly-oriented polycrystalline BaSi2 films on TiN metal layers by sputtering for the deployment of BaSi2 solar cells on a flexible substrate. The formation of BaSi2 films was demonstrated by X-ray diffraction and Raman spectroscopy. The photoresponsivity increased at wavelengths < 1000 nm, corresponding to the bandgap of BaSi2, and reached 1.6 A/W at a wavelength of 650 nm under a bias voltage of 0.5 V applied to the front ITO electrode with respect to the TiN layers. This value is equivalent to the highest value ever achieved for undoped BaSi2 epitaxial films by molecular beam epitaxy.

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“…(ii) Electromagnetic field emitted or scattered by molecules located in close proximity can be used in areas such as chemical and material science art restorations, military, plasmonics nanoparticles, the existence of cancerous and healthy cells, infections and hereditary diseases [8][9][10][11][12][13][14][15].…”

Section: Eejp 4 (2019)mentioning

confidence: 99%

“…(9) and Eqn. (10). Secondly, with the oscillating dipole, the amount of this time delay is different for the two charges since they are at different distances (r 1 ≠r 2 ) from P(only when ϴ = 90 0 = ,that r 1 =r 2 ).…”

Section: Formulationmentioning

confidence: 99%

Effect of the Oscillating Electric Field Due to the Oscillating Electric Dipole on Raman Lines

Kapil

Gilbert

2019

EEJP

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Raman Effect is the measurement of the intensity and wavelength of the inelastically scattered radiation that falls on a molecule. The electric field of the incident radiation polarizes the molecule on which it falls and this leads to the creation of an oscillating dipole. The incident polarized laser light is inelastically scattered by the molecular sample. The scattered light contains modified wavelengths called the Stokes and anti-Stokes lines or wavelengths. The oscillating electric dipole, created by the incident radiation, creates an oscillating electric field around it. Since the oscillating electric field of the incident radiation creates an oscillating electric dipole that create an oscillating electric field around it, it was surmised that this oscillating electric field can affect the frequency of vibration or oscillation of the oscillating electric dipole that produces it. This novel effect will change the frequency (frequencies) of the scattered radiation resulting in Stokes and anti-Stokes lines with modified frequencies. This theoretical research and its importance can be understood like this. For instance, if there are two cells or molecules, side by side, in which one is a healthy cell and the other is cancerous, or two different types of molecules are sitting side by side, this types of scattering should be able to distinguish one from the other since the Stokes and anti-Stokes lines from the two molecules will not be identical. Thus, the incident radiation of angular frequency ω1 polarizes the charges of the molecule on which it falls and this leads to the creation of an oscillating dipole of frequency ω2. The oscillating dipole creates an oscillating electric field that can create additional frequency of the oscillating dipole that created it, and let this be ωD. Then the Raman lines can have frequencies (ω1+ω2+ωD), (ω1+ω2-ωD), (ω1-ω2+ωD), and (ω1-ω2-ωD). Depending on the relative magnitudes of ω2 and ωD, Raman lines will be designated as Stokes and Anti-Stokes lines. Due to the law of conservation of energy, ωD will be less than ω2 since an oscillating dipole cannot create field of frequency more than its own frequency. Hence the frequencies (ω1-ω2+ωD) and (ω1-ω2-ωD) correspond to Stokes lines, and frequencies. (ω1+ω2+ωD) and (ω1+ω2‑ωD) will correspond to Anti-Stokes lines. Calculations for Stokes and Anti-stokes lines have been done for some molecules, namely Ammonia compound (NH3), Nitrousoxide compound (N2O), Water (H2O), Sulphur dioxide compound (SO2), Ozone compound (O3). Calculations have also been done for compounds containing carbon, such as Dichloromethane compound (CH4Cl2), Formic acid compound (CH2O2), Methanol compound (CH4O), Benzene compound (C6H6), Propane compound (C3H8), and Carbonyl chloride compound (Cl2CO). The theory developed predicts new phenomena of getting Stokes and anti-Stokes lines with modified wavelengths which have not been observed experimentally as of to-day.

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Thermodynamic model and Raman spectra of BaO-B2O3 glasses

Cited by 13 publications

References 35 publications

Recent Progress Toward Realization of High‐Efficiency BaSi₂ Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Recent Progress Toward Realization of High‐Efficiency BaSi₂ Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Fabrication of high-photoresponsivity BaSi₂films formed on conductive layers by radio-frequency sputtering

Effect of the Oscillating Electric Field Due to the Oscillating Electric Dipole on Raman Lines

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Thermodynamic model and Raman spectra of BaO-B2O3 glasses

Cited by 13 publications

References 35 publications

Recent Progress Toward Realization of High‐Efficiency BaSi2 Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Recent Progress Toward Realization of High‐Efficiency BaSi2 Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Fabrication of high-photoresponsivity BaSi2films formed on conductive layers by radio-frequency sputtering

Effect of the Oscillating Electric Field Due to the Oscillating Electric Dipole on Raman Lines

Contact Info

Product

Resources

About

Recent Progress Toward Realization of High‐Efficiency BaSi₂ Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Recent Progress Toward Realization of High‐Efficiency BaSi₂ Solar Cells: Thin‐Film Deposition Techniques and Passivation of Defects

Fabrication of high-photoresponsivity BaSi₂films formed on conductive layers by radio-frequency sputtering