BaSnO3 based thermally stable capacitors

Bucur, Raul Alin; Bucur, Alexandra Ioana; Novaconi, S.; Nicoarǎ, Irina

doi:10.1016/j.jallcom.2012.07.072

Cited by 33 publications

(9 citation statements)

References 15 publications

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“…These stannates exhibit interesting properties that lead to their application as stable thermal capacitors, high-quality humidity sensors and photoluminescent and photocatalytic materials [10][11][12][13]. The use of these materials for photocatalytic water splitting is well known [14,15].…”

Section: Pbnmmentioning

confidence: 99%

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

Sales

Bouquet

Députier

et al. 2014

Solid State Sciences

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Semiconductor materials have received substantial attention as photocatalysts for controlling water pollution. Among these materials, perovskite-structured SrSnO 3 is a promising candidate for this application, whereas BaSnO 3 exhibits very low activity. In the present work, Sr 1-x Ba x SnO 3 (x = 0, 0.25, 0.50, 0.75 and 1) was synthesized by solid-state reaction and was applied in the photocatalytic discoloration of the organic dye Remazol Golden Yellow. The perovskite structure was obtained for all compositions of the solid solutions with both Sr The two materials appear to feature different mechanisms of photodegradation: the direct mechanism prevails in the case of BaSnO 3 , whereas the indirect mechanism appears to play a key role in the case of SrSnO 3 .

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Section: Pbnmmentioning

confidence: 99%

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

Sales

Bouquet

Députier

et al. 2014

Solid State Sciences

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“…The bismuth ferrite investigated sample, in the form of a disk, was connected to the LCR-meter (TEGAM model 3550) and placed in a thermally isolated oven, heated by an electrical resistor; the temperature ( T ) of the sample was registered with a thermocouple [ 23 ]. In this way, for each sample, Z′ and Z″ components of the complex impedance at different temperatures and frequencies were determined.…”

Section: Resultsmentioning

confidence: 99%

“…To investigate the temperature dependence of the σ DC conductivity at a constant frequency from the static region, f = 0.5 kHz (see Figure 4 ), the sample connected to the LRC-meter was placed into the oven [ 23 ], and the components Z′ and Z″ at different temperatures between 25 °C and 290 °C were measured, and then, with Equation (2), σ DC was computed. The temperature dependence of the conductivity (σ DC (T)) for the investigated samples is shown in Figure 6 .…”

Section: Resultsmentioning

confidence: 99%

“…A layer of Ag was deposited on both polished surfaces of the disk, representing the two electrodes that were connected to an LCR-meter, with which the measurements of the complex impedance of investigated samples were performed. The electrical conductivity and the complex dielectric permittivity of samples were determined by complex impedance measurements at different frequencies between 200 Hz and 2 MHz and at different temperatures from 25 to 290 • C, using an LCR meter TEGAM model 3550 (Geneva, OH, USA) and an electrical oven [23].…”

Section: Methodsmentioning

confidence: 99%

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The Effect of Bi2O3 and Fe2O3 Impurity Phases in BiFeO3 Perovskite Materials on Some Electrical Properties in the Low-Frequency Field

et al. 2022

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Pure bismuth ferrite (BFO) and BFO with impurity phases (Bi2O3 or Fe2O3) were synthesized by the hydrothermal method. Complex dielectric permittivity (ε) and electrical conductivity (σ) were determined by complex impedance measurements at different frequencies (200 Hz–2 MHz) and temperatures (25–290) °C. The conductivity spectrum of samples, σ(f), complies with Jonscher’s universal law and the presence of impurity phases leads to a decrease in the static conductivity (σDC); this result is correlated with the increased thermal activation energy of the conduction in impure samples compared to the pure BFO sample. The conduction mechanism in BFO and the effect of impurity phases on σ and ε were analyzed considering the variable range hopping model (VRH). Based on the VRH model, the hopping length (Rh), hopping energy (Wh) and the density of states at the Fermi level (N(EF)) were determined for the first time, for these samples. In addition, from ε(T) dependence, a transition in the electronic structure of samples from a semiconductor-like to a conductor-like behavior was highlighted around 465–490 K for all samples. The results obtained are useful to explain the conduction mechanisms from samples of BFO type, offering the possibility to develop a great variety of electrical devices with novel functions.

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“…Alkaline earth stannate with general formula MSnO 3 (M = Ca, Sr, Ba, and Mg) is a distinct perovskite system among which barium stannate is particularly a one of the important direct band gap (E g ≈ 3.4 eV) semiconductor. It has been used in various applications, such as, gas sensors, photo‐catalysts, variable capacitors, dye sensitized solar cells, etc . Especially, the wide band gap and relatively high electron mobility of BaSnO 3 , makes it a better photoanode material for dye sensitized solar cells as compared to the commonly used TiO 2 …”

Section: Introductionmentioning

confidence: 99%

Cetyltriammonium Bromide Assisted Synthesis of Lanthanum Containing Barium Stannate Nanoparticles for Application in Dye Sensitized Solar Cells

Kumar

Кумар

Quamara

2018

Physica Status Solidi (a)

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In present work, correlation of structural and optical behavior of pristine and lanthanum containing barium stannate nanoparticles (synthesized via cetyltriammonium bromide (CTAB) assisted facile wet chemical route), and its effect on photovoltaic properties of dye-sensitized solar cell are reported. Thermo-gravimetric analysis of the dried compound presumably BaSn(OH) 6 , leads to the formation of BaSnO 3 nanoparticles through three endothermic decomposition processes, via liberation of one mole of water in each step, together with removal of remaining CTAB in initial cycle. The X-ray diffraction patterns reveal that substitution of Ba 2þ lattice sites by La 3þ (upto %6 at.%), the lattice retains its cubic Pm3m symmetry, however, unit cell contracts. The dye sensitized solar cells are fabricated using pristine and La-containing BaSnO 3 as photo anode; platinum coated FTO as counter electrode, N719 dye as sensitizer and I À /I 3 À as electrolyte. These show the highest power conversion efficiency (%9.2%) at the La content of 6 at.% which is about threefold increase in efficiency in comparison to pristine BaSnO 3 . The electron transport properties of these DSSC devices are investigated by electro chemical impedance spectroscopy.

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BaSnO3 based thermally stable capacitors

Cited by 33 publications

References 15 publications

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

Sr1−xBaxSnO3 system applied in the photocatalytic discoloration of an azo-dye

The Effect of Bi2O3 and Fe2O3 Impurity Phases in BiFeO3 Perovskite Materials on Some Electrical Properties in the Low-Frequency Field

Cetyltriammonium Bromide Assisted Synthesis of Lanthanum Containing Barium Stannate Nanoparticles for Application in Dye Sensitized Solar Cells

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