Laser stimulated second and third harmonic optical effects in F: SnO2 nanostructures grown via chemical synthetic route

Anusha,; Acharya, B. Sudarshan; Antony, Albin; Ani, Aninamol; Kityk, I.V.; Jedryka, J.; Rakus, P.; Wojciechowski, A.; Poornesh, P.; Kulkarni, Suresh D.

doi:10.1016/j.optlastec.2019.105636

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…carrier concentration) can be explained by the BM shift; the absorption edge shifts to higher energies with increasing carrier concentration [18]. Similar behavior has been observed by several authors [3,16,18].…”

Section: Resultssupporting

confidence: 84%

“…For a wavelength equal to 400 nm, it can be seen that transmittance diagrams clearly evoke the drop due to inter-band absorption (fundamental absorption). A shift towards shorter wavelengths for undoped and F-doped films, which reflects the Burstein-Moss (BM) effect [16] and results in enhanced transmission in the UV range, is a very important feature for thin-film solar cell applications, as they allow more high-energy photons to reach the solar cell. The direct optical gap (Eg) for undoped and F-doped SnO2 films is estimated from plots of (hν) 2 vs. photon energy (hν), as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Super-Hydrophobic F-Doped SnO2 (FTO) Nanoflowers Deposited by Spray Pyrolysis Process for Solar Cell Applications

Guermat¹,

Darenfad²,

Mirouh³

et al. 2022

J. Nano- Electron. Phys.

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Polycrystalline films of undoped and fluorine-doped SnO2 (FTO) are deposited on a glass substrate by spray pyrolysis at 400 °C. The effects of fluor concentration (8, 10 and 12 %) on the structural, morphological, optical and electrical properties of FTO films are studied. Our XRD results show that F-SnO2 still has the same rutile structure as undoped SnO2 with improved crystallization for doped films, with no other phase detected. The measured contact angles are  90° for undoped and 8 % F doped films, which confirms the hydrophilic character, while other doped (SnO2:10 % F and SnO2:12 % F) films show the hydrophobic character at contact angle values of  90° and the super-hydrophobic (CA = 140°) for SnO2:12 % F thin film. A higher transmittance value of 83 %, a wide band gap equal to 3.9 eV, and lower disorder (287.68 meV) are observed for the 12 % F doped SnO2 film. In addition, electrical resistivity (), carrier concentration (n) and Hall mobility () are determined from Hall effect measurements and it is found that all the elaborated thin films have n-type conductivity. The lowest resistivity of 2.245  10 -4 Ωcm and the highest Hall mobility of 24.55 cm 2 V -1 s -1 are obtained at an F concentration of 12 %. The results suggest that the FTO film at 12 %F can be used as a transparent conductive oxide of the front electrode for film solar cells.

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Super-Hydrophobic F-Doped SnO2 (FTO) Nanoflowers Deposited by Spray Pyrolysis Process for Solar Cell Applications

Guermat¹,

Darenfad²,

Mirouh³

et al. 2022

J. Nano- Electron. Phys.

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“…An outcome of their fascinating features and different benefits (for instance, hierarchical SnO 2 Nanostructures [25], flower-like SnO 2 nanostructures [26]- [28], One-dimensional [29], Nanosheet-assembled hierarchical [30] and 1D and surface-functionalized SnO 2 nanosized of numerous structures [31]), was that a variety of SnO 2 nanomaterials were generated through diverse procedures. These procedures include, but are not limited to, the hydrothermal method [32]- [35], the carbothermal reduction [36], the thermal evaporation [37], [38], the microwave-assisted [39], the nano casting route [40], and the spray pyrolysis technique [41]. Nevertheless, the effectiveness of every technique for distributing nanosized materials is limited via re-accretion of separate nanostructures and the growth of an equipoise setting in induced circumstances, that dictates the measurement planes of the agglomerate of distributed nanosized.…”

Section: Introductionmentioning

confidence: 99%

The Effect of PVP Concentration on Particle Size, Morphological and Optical Properties of Cassiterite Nanoparticles

et al. 2020

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Different concentrations of polyvinylpyrrolidone (PVP) have been successfully employed to prepare high purity tetragonal cassiterite nanoparticles, and control the growth of particle size. The effect of PVP on the structural, morphological, size, composition, and optical properties of the prepared cassiterite nanoparticles has been investigated. It has been found that various characteristics of tetragonal cassiterite nanoparticles could be optimized by simply changing the values of PVP. The pure tetragonal cassiterite nanoparticles have been produced at the optimum calcination temperature. The XRD and SEM results indicated the structural and morphological properties of the tetragonal cassiterite nanoparticles, respectively. The particles' size and their distribution have been displayed by TEM images. The composition phase and the surface composition of the prepared samples have been evaluated via FTIR and XPS, respectively. The optical properties of the prepared tetragonal cassiterite nanoparticles have been studied using UV-vis and PL spectroscopy. Outcomes cassiterite nanoparticles are useful for antibacterial activity and application of solar energy. INDEX TERMS Cassiterite nanoparticles, polyvinylpyrrolidone, thermal treatment technique, energy applications.

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“…This occurrence could be attributed to enhancement photoexcitation and relaxation processes within the sample [50], potentially facilitated by local defect levels that increased by doping concentration. Furthermore, the increase in THG signal is also can be influenced by multiphoton excitation [51].…”

Section: Third Harmonic Generation Studiesmentioning

confidence: 99%

Third-harmonic optical process in Zn:NiO thin films under the influence of femtosecond and continuous wave laser excitation

Thundiyil,

Anusha,

et al. 2024

Mater. Res. Express

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In this study, we focused on the impact of nonlinear optical properties on Zn-doped NiO thin film, which was analyzed using z scan and THG technique. The z-scan technique was performed using a continuous wave laser. The open aperture shows that all films exhibit the reverse saturable absorption and the mechanism responsible for two-photon absorption, excited state absorption, and free carrier absorption. The closed aperture results in the negative nonlinear refraction caused by the thermal effects. The enhancement in the third-order susceptibility from 5.37 ×10-3 to 13.24 ×10-3 esu with Zn doping is due to the presence and increase in the concentration of defect levels in the films. The THG studies were performed using femtosecond and nanosecond lasers and revealed that the enhancement in the signal with the rise in Zn doping concentration was attributed to the enhancement of photoexcitation and relaxation processes within the sample. These results suggest that Zn-doped NiO films have significant potential for applications in the realm of optoelectronic applications.

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Laser stimulated second and third harmonic optical effects in F: SnO2 nanostructures grown via chemical synthetic route

Cited by 7 publications

References 32 publications

Super-Hydrophobic F-Doped SnO2 (FTO) Nanoflowers Deposited by Spray Pyrolysis Process for Solar Cell Applications

Super-Hydrophobic F-Doped SnO2 (FTO) Nanoflowers Deposited by Spray Pyrolysis Process for Solar Cell Applications

The Effect of PVP Concentration on Particle Size, Morphological and Optical Properties of Cassiterite Nanoparticles

Third-harmonic optical process in Zn:NiO thin films under the influence of femtosecond and continuous wave laser excitation

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