Thickness-dependent structural, spectral, linear, nonlinear and z-scan optical studies of V<sub>2</sub>O<sub>5</sub> thin films prepared by a low-cost sol-gel spin coating technique

Ravinder, G.; Sreelatha, C.J.; Ganesh, V.; Shkir, Mohd.; Shkir, Mohd.; Rao, P. Chandar

doi:10.1088/2053-1591/ab2992

Cited by 24 publications

(10 citation statements)

References 58 publications

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“…The peak at 698 cm −1 shows the stretching mode of disordered VOV. [ 36 ] The lower frequency vibration at 998 cm −1 is due to the VO stretching vibration mode of thin films. [ 37 ] On further increase in annealing temperature to 350 and 450 °C, the peak at 267 cm −1 was shifted to 262 cm −1 , which is related to the VO bending vibration of V 2 O 5 .…”

Section: Resultsmentioning

confidence: 99%

Electrochromic Behavior of Vanadium Pentoxide Thin Films Prepared by a Sol–Gel Spin Coating Process

Amala

Vignesh

Geetha

et al. 2021

Physica Status Solidi (a)

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Section: Resultsmentioning

confidence: 99%

Electrochromic Behavior of Vanadium Pentoxide Thin Films Prepared by a Sol–Gel Spin Coating Process

Amala

Vignesh

Geetha

et al. 2021

Physica Status Solidi (a)

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“…These values of the refractive index of the V 2 O 5 thin films are good agreement with the reported values in the literature. [51,64,65] Moreover, the V 2 O 5 thin films have higher linear refractive index as compared with the as-deposited thin film.…”

Section: Linear Optical Properties Of Thin Filmsmentioning

confidence: 99%

“…[48,49] Mousavi et al reported third-order nonlinear optical properties of V 2 O 5 nanoparticles doped with Co, [50] and Ravinger et al reported thickness-dependent nonlinear absorption characteristics of the V 2 O 5 thin films produced by sol-gel. [51] In this work, the effects of annealing on nonlinear absorption, nonlinear refractive, and optical limiting behaviors of ultrasonic…”

mentioning

confidence: 99%

Thermally Induced Phase Transition and Defect‐Assisted Nonlinear Absorption and Optical Limiting in Nanorod Morphology V₂O₅ Thin Films

et al. 2021

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Materials possessing nonlinear and saturable absorptions received significant interest due to their applicability in various novel technological applications such as optical limiting, Q-switching, upconversion lasing, and mode locking. [1][2][3][4] Nonlinear optical properties of materials like nonlinear and saturable absorptions are highly affected by localized defect states that alter the bandgap energy (E g ) in the structure. These states could be altered by changing the thickness of the material, doping the material, and heat treatment and can be filled by one-photon absorption (OPA), two-photon absorption (TPA), and free carrier absorption (FCA) mechanisms. [5][6][7][8][9][10] Among these mechanisms, TPA is the dominant mechanism when a laser energy between E g /2 and E g is used.Recent studies on transition metal oxides revealed their potential for novel photonic devices using their nonlinear optical properties. [11][12][13][14][15] Among the other transition metal oxides, V 2 O 5 is one the most stable and easily synthesized material. [16,17] Various morphologies of the V 2 O 5 thin films about transition from semiconductor-to-metallic phase (SMT) were reported at a transition temperature of 257 C. [18,19] V 2 O 5 thin films can be easily deposited onto different substrates using diverse techniques such as thermal evaporation, [20] pulsed laser deposition, [21][22][23] magnetron sputtering, [24,25] chemical vapor deposition, [26][27][28][29] sol-gel process, [30,31] ultrasonic spray deposition (USD), [32] and spray pyrolysis. [33][34][35] Among all of the deposition techniques, the USD method is highly promising as it allows effective material utilization, relatively low deposition cost, and deposition under atmospheric conditions. Typical applications of V 2 O 5 thin films include but are not limited to gas sensors, [36,37] catalysis, [38] electrochromics, [39,40] and optoelectronic applications. [41] Although there are numerous studies on the diverse properties of V 2 O 5 in the literature, [42][43][44][45][46][47] in contrast, only a few studies reported the nonlinear optical properties of V 2 O 5 . Nonlinear absorption characteristics of V 2 O 5 and Na-doped V 2 O 5 nanoparticles prepared by solution combustion were investigated by Molli et al. and Pradhan et al., respectively. [48,49] Mousavi et al. reported third-order nonlinear optical properties of V 2 O 5 nanoparticles doped with Co, [50] and Ravinger et al. reported thickness-dependent nonlinear absorption characteristics of the V 2 O 5 thin films produced by sol-gel. [51] In this work, the effects of annealing on nonlinear absorption, nonlinear refractive, and optical limiting behaviors of ultrasonic

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“…Vanadium pentoxide is one of the most important oxides of vanadium [ 2 ], which is a layered amphoteric oxide with good catalytic activity [ 3 ]. V 2 O 5 is widely used in vanadium batteries and electrode materials, nanostructured materials, and optical devices, as well as in metallurgy and the chemical and aerospace industries, owing to its excellent physical and chemical properties [ 4 , 5 , 6 , 7 , 8 , 9 ]. Due to the widespread application of vanadium pentoxide, its demand and purity requirements are higher.…”

Section: Introductionmentioning

confidence: 99%

A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption

et al. 2022

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The general preparation method for V2O5 is ammonium salt vanadium precipitation, which inevitably produces large amounts of ammonia nitrogen wastewater. In this paper, we propose an environmentally friendly method for preparing high-purity V2O5 with low ammonium consumption. The purity of the V2O5 product reaches more than 99% while reducing the level of ammonium consumption. The vanadium precipitation efficiency reaches 99.23% and the V2O5 purity of the product reaches 99.05% under the following conditions: precipitation time of 1.5 h, precipitation temperature of 98 °C, initial precipitation pH of 2, ammonium addition coefficient of 2, purification time of 5 min with purification performed twice, purification temperature of 65 °C. In this study, compared with the use of ammonia spirit for vanadium precipitation and ammonium salt vanadium precipitation, the ammonia consumption levels are reduced by 79.80% and 80.00%, and the purity levels are increased by 0.70% and 1.01%, respectively. The compositions of the precipitated (NaV3O8∙xH2O) and purified ((NH4)2V6O16·1.5H2O) hydrolysis products are characterized via XRD. The TGA results show that NaV3O8∙xH2O contains 1.5 times the amount of crystal water. The FTIR results explain that the two V3O8− layers are combined end-to-end to form a V6O162− layer. The change of the product image indicates that the purification process includes three stages. Firstly, heating and NH4+ attack expand the V3O8− layer. NH4+ diffuses more easily into the V3O8− layer. Secondly, NH4+ destroys the electrostatic interaction between Na+ with the V3O8− layer and replacing Na+. Finally, V3O8− is polymerized into V6O162− to keep the crystal structure stable.

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Thickness-dependent structural, spectral, linear, nonlinear and z-scan optical studies of V₂O₅ thin films prepared by a low-cost sol-gel spin coating technique

Cited by 24 publications

References 58 publications

Electrochromic Behavior of Vanadium Pentoxide Thin Films Prepared by a Sol–Gel Spin Coating Process

Electrochromic Behavior of Vanadium Pentoxide Thin Films Prepared by a Sol–Gel Spin Coating Process

Thermally Induced Phase Transition and Defect‐Assisted Nonlinear Absorption and Optical Limiting in Nanorod Morphology V₂O₅ Thin Films

A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption

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Thickness-dependent structural, spectral, linear, nonlinear and z-scan optical studies of V2O5 thin films prepared by a low-cost sol-gel spin coating technique

Cited by 24 publications

References 58 publications

Electrochromic Behavior of Vanadium Pentoxide Thin Films Prepared by a Sol–Gel Spin Coating Process

Electrochromic Behavior of Vanadium Pentoxide Thin Films Prepared by a Sol–Gel Spin Coating Process

Thermally Induced Phase Transition and Defect‐Assisted Nonlinear Absorption and Optical Limiting in Nanorod Morphology V2O5 Thin Films

A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption

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Thickness-dependent structural, spectral, linear, nonlinear and z-scan optical studies of V₂O₅ thin films prepared by a low-cost sol-gel spin coating technique

Thermally Induced Phase Transition and Defect‐Assisted Nonlinear Absorption and Optical Limiting in Nanorod Morphology V₂O₅ Thin Films