Effect of different dopants Ba and Ag on the properties of SrTiO 3 nanopowders

Ghasemifard, Mahdi; Abrishami, M. Ebrahimizadeh; Iziy, Meysam

doi:10.1016/j.rinp.2015.10.005

Cited by 15 publications

(4 citation statements)

References 21 publications

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“…Heat treatment of as-prepared dark and white powder at 850 • C results in crystalline structure formation. [20][21][22] B: Urea metal cation ratio (U:MC = 0.8 and 0.7): The cations of titanium and silicon were added to urea and distilled water as the base solution. The heating process accompanied with bubbles formation due to the removal of volatile species.…”

Section: Methodsmentioning

confidence: 99%

Frequency dependence and fuel effect on optical properties of nano TiO₂-based structures

2016

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TiO 2 -(Ti 0.5 Si 0.5 )O 2 nanopowders (TS-NPs) with average particle size around 90 nm were successfully synthesized by controlled auto-combustion method by using citric acid/nitric acid (AC:NA) and urea/metal cation (U:MC). The structure of powders was studied based on their X-ray diffraction (XRD) patterns. The XRD of TS-NPs shows that rutile and anatase are the main phases of TS-NPs for AC:NA and U:MC, respectively. Particle size and histogram of nanopowders were characterized by transmission electron microscopy (TEM) and dynamic light scattering (DLS). Optical properties of TS-NPs were calculated by Fourier transform infrared spectroscopy (FTIR) and Kramers-Kroning (KK) relation. Plasma frequencies of TS-NPs obtained from energy loss functions depend on fuels as a result of changes in crystal structure, particle size distribution, and morphology.

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Section: Methodsmentioning

confidence: 99%

Frequency dependence and fuel effect on optical properties of nano TiO₂-based structures

2016

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“…The wavelength intersection between 𝑛(𝜔)and 𝑘(𝜔) can be determined from the FTIR spectral analysis of TO and LO [14]. TO has a lower wavelength than LO because of the intersection of the optics with the crystal lattice.…”

Section: 𝑁 ̃(𝜔) = 𝑛(𝜔) + 𝑘(𝜔)mentioning

confidence: 99%

“…The wavenumber data for the intersection of the real and imaginary parts of the dielectric functions are presented in Table 2. The real part (ε1) represents the energy stored in the material, whereas the imaginary part (ε2) represents the energy dissipated as heat [14]. The real and imaginary dielectric intensities increased with the addition of Cu dopants.…”

Section: Figure 1 Ftir Spectrum Of Srtio3 Films Doped With Cupricmentioning

confidence: 99%

Effect of Cupric-Doped SrTiO₃ Films on Optical Properties Using Spectrophotometry Method

Santi,

Har,

Jenie

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Film Strontium Titanate (SrTiO3) doping cupric (Cu2+) with various concentrations (0%, 0.5%, and 1%) was successfully synthesized using the Chemical Solution Deposition (CSD) method. The films were deposited above the Si type-p (1 0 0) substrate in five layers using a spin-coating technique (3000 rpm, for 60 s) at a concentration of 2 M. The annealing process was held at 850 °C for 8 hours with a temperature increase rate of 1.67 °C/min for crystallization, and the optical properties were characterized using spectrophotometric methods. The results of FTIR with the Kramers-Kroning quantitative method showed a decrease in the wavenumber of the phonon vibration mode Transverse Optic (TO), Longitudinal Optic (LO), and the intersection of the real and imaginary dielectrics, which showed a red shift with increasing Cu concentration. The optical properties of SrTiO3 films doped with Cu indicate their potential for applications in visible light photoconduction, such as light sensors.

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“…Found the carriers concentration of charge are holes, p-type of Sr1-xBxTiO3 thin films at doping ratio (x=2, 4, 6 and 8)%, it is seen that the carriers concentration are increased from (6.776×10 9 -3.888×10 11 ) cm -3 as the B content are increasing at x=(0.00-0.08). The increasing is attributed to increase the charge carrier [26][27][28]. The carrier concentration (n) is related to the Hall coefficient (RH) as expressed by the Eq.…”

Section: Hall Effect Measurementmentioning

confidence: 99%

Aerosol-Assisted Chemical Vapor Deposition (AACVD) Technique of SrTiO3: B Thin Films and Study the Structural and Optical Properties and Hall Effect Measurements

Abdul-Hussein

Hussain

Khalaf

2022

Al-Mustansiriyah Journal of Science

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Aerosol-assisted chemical vapor deposition (AACVD) technique is very precise implemented to fabrication of structured SrTiO3 and Sr1-xBxTiO3 thin films at doping ratio (x = 2, 4, 6 and 8) % at temperature 400 °C on a glass substrate. The X-Ray Diffraction (XRD) patterns illustrated that the SrTiO3 and Sr1-xBxTiO3 thin films have a polycrystalline nature and cubic structure, the detailed characterization of the films by X-ray diffraction (XRD), the Surface Morphology studied by using (AFM) and (SEM). Have been noticed from AFM measurement the Roughness and RMS were increased with increases doping ratio. The optical properties of SrTiO3 and Sr1-xBxTiO3 thin films have been studied at doping ratio (x = 2, 4, 6 and 8) % at rate (300-900) nm. The transmittance spectrum is characterized by the opposite behavior of the absorbance spectrum. The transmittance generally increases with the increase in the wavelength of radiation, at wavelengths with low energies while the absorbance decreased slowly at spectrum rate (300-900) nm i.e. in the visible region. The band gap (Eg) is decreased at (3.2 - 2.5) eV which indicates that the doping process has led to the emergence of localized levels in the region confined by the valence and conduction bands, led to a reduction in the photon energy required for direct electronic transitions to occur. Found the carriers concentration charge are holes of Sr1-xBxTiO3 thin films at doping ratio (x = 2, 4, 6 and 8) %. Many properties can be improved by adding impurities such as Boron (B) to the SrTiO3, which can be used in solar cells, electronic industries or thermoelectric generators by controlling the optical or structural properties of the material by controlling the materials and percentages of impurity, or through heat treatment of the material, such as annealing, for example or exposure to different temperatures.

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Effect of different dopants Ba and Ag on the properties of SrTiO 3 nanopowders

Cited by 15 publications

References 21 publications

Frequency dependence and fuel effect on optical properties of nano TiO₂-based structures

Frequency dependence and fuel effect on optical properties of nano TiO₂-based structures

Effect of Cupric-Doped SrTiO₃ Films on Optical Properties Using Spectrophotometry Method

Aerosol-Assisted Chemical Vapor Deposition (AACVD) Technique of SrTiO3: B Thin Films and Study the Structural and Optical Properties and Hall Effect Measurements

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Effect of different dopants Ba and Ag on the properties of SrTiO 3 nanopowders

Cited by 15 publications

References 21 publications

Frequency dependence and fuel effect on optical properties of nano TiO2-based structures

Frequency dependence and fuel effect on optical properties of nano TiO2-based structures

Effect of Cupric-Doped SrTiO3 Films on Optical Properties Using Spectrophotometry Method

Aerosol-Assisted Chemical Vapor Deposition (AACVD) Technique of SrTiO3: B Thin Films and Study the Structural and Optical Properties and Hall Effect Measurements

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Product

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Frequency dependence and fuel effect on optical properties of nano TiO₂-based structures

Frequency dependence and fuel effect on optical properties of nano TiO₂-based structures

Effect of Cupric-Doped SrTiO₃ Films on Optical Properties Using Spectrophotometry Method