Triple Perovskite Research Articles

Chemistry and Physics of Triple Perovskite Oxides: A Topical Review

Chemistry and Physics of Triple Perovskite Oxides: A Topical Review

Important comments on the paper “Development of a novel triple perovskite barium bismuth molybdate material for thermistor-based applications” by D. Panda et al.

My comments concern the severe errors in the crystallographic part of the paper “Development of a novel triple perovskite barium bismuth molybdate material for thermistor-based applications” by D. Panda et al. (Mater. Sci. Engin. B 296 (2023) 116616). Authors have proposed that their sample is a derivative of two different crystals, Ba2Bi2O5 and BaMoO4. Unfortunately, this is not the same as a creation of a new crystal with the supposed chemical formula Ba3Bi2MoO9. Moreover, the structure analysis is wrong what is presented by inacceptable high reliability factors.

Theoretical simulation of mixed organic–inorganic perovskite solar cell using SCAPS-1D simulator

In this work, a triple cation mix halide perovskite solar cell is explored to improve its stability and efficiency. FTO/SnO2/perovskite/CuSCN/carbon the device structure is simulated using SCAPS-1D and outcomes and found in good agreements with experimental results. Furthermore, the effect of various parameters like absorbance coefficient, reflection of front surface, defect capture cross section and defect position on device performance are examined. This optimized device exhibits high PCE, 27.10 % with Voc = 1.24 V, Jsc = 25.37 mA/cm2 and FF = 85.70 %. Finally, the effects of temperature, absorber defect density and interface defect density are computed on optimised structure and observed degradation in device performance with increase in these factors. Lastly, the results are concluded using J-V and EQE curves. This study may be vital in the development of stable and highly efficient triple cation perovskite solar cell technology.

Optical characterization of La2SrFe2TiO9 triple perovskite: Insights for advanced optoelectronic and solar cell applications

In this work, powdered La2SrFe2TiO9 triple perovskite that was produced by a solid-state reaction is analyzed to determine its optical characteristics. The transmittance and absorbance were measured using UV–visible spectroscopy at room temperature, which allowed for the discovery of promising optical properties. Based on the Tauc technique, the material has been shown to have a direct bandgap of 2.02 eV. Furthermore, the DASF method study has confirmed that the material is a direct bandgap. The absorption coefficient, Urbach energy, refractive index, optical conductivity, and dielectric function were included among the investigated optical properties. Calculations were performed for first- and third-order nonlinear susceptibilities and static and nonlinear refractive indices. These calculations brought to light the material's potential for use in advanced optoelectronic and solar cell applications. The remarkable optical properties of La2SrFe2TiO9, which include both linear and nonlinear characteristics, have made it an attractive candidate for use in advanced optoelectronic and solar cell applications.

Comments on the paper “Development of a novel triple perovskite barium bismuth molybdate material for thermistor-based applications”

The title paper (Materials Science & Engineering B 296 (2023) 116616) claimed the preparation and detailed characterization by different methods of a novel triple perovskite compound, Ba3Bi2MoO9. In this comment, it is shown that the phase Ba3Bi2MoO9 does not exist. We show that the absence of the phase analysis resulted in erroneous claims. We demonstrate that the sample in the title paper is mainly a mixture of BaBiO3 and BaMoO4.

Exploring the structural, morphological, optical and magnetic properties of pure and Ni-doped Triple Perovskite La2SrFe2TiO9 for magneto-opto electronic applications

The Present work represents the Structural, morphological, magnetic, and optical properties of Pristine and Ni-doped La2SrFe2TiO9 Triple Perovskite. The samples were synthesized by using the solid-state reaction approach. We have carried out the structural characterization of the La2SrFe2-xNixTiO9 (x = 0.0, 0.1, 0.2, 0.3 and 0.5) Triple Perovskite by using X-ray diffraction and found that all the synthesized samples were grown in a single phase with space group (Pnma) which has been confirmed further by Rietveld Refinement. The microstructural analysis and the elemental composition analysis were carried out using a Field Emission Scanning Electron Microscope (FE-SEM) and Energy dispersive spectroscopy (EDS) respectively. The morphological studies of the sample reveal that the grain size of the sample decreases (1.11–0.75 μm) with Ni Doping. The optical band gap of the samples was characterized by UV–vis spectroscopy measurements, and we have obtained the value of the energy band gap from 2.02 to 1.67 eV, confirming the application of the material in the Infrared region of the electromagnetic spectrum. The M − H measurements reveal the stabilized ferromagnetic character of the pure La2SrFe2TiO9 Triple Perovskite upon Ni doping. The XPS Studies confirm that Ni exists in the form of Ni2+ while Fe exists in the form of Fe3+. The magnetic measurements were understood theoretically by using the mathematical equation. The current study indicates the stability of the samples, and their possible utilisation in spintronics, magnetic storage devices, magneto-optoelectronics, and solar cell applications.

Iodine-based triple halide perovskites for photovoltaic and photocatalytic applications: a ab-initio study

Iodine-based triple halide perovskites for photovoltaic and photocatalytic applications: a ab-initio study

DFT Study of the Structural and Magnetic Properties of Triple Perovskites Ba3TiRu2O9 and Ba3ZrRu2O9

DFT Study of the Structural and Magnetic Properties of Triple Perovskites Ba3TiRu2O9 and Ba3ZrRu2O9

Reply to the Comments on the article “Comments on the paper “Development of a novel triple perovskite barium bismuth molybdate material for thermistor-based applications”." Materials Science and Engineering: B 303 (2024): 117315’’

Reply to the Comments on the article “Comments on the paper “Development of a novel triple perovskite barium bismuth molybdate material for thermistor-based applications”." Materials Science and Engineering: B 303 (2024): 117315’’

Relaxor ferroelectric-like glassy dielectric dispersion in the triple perovskite Ba3CoSb2O9.

In this work, the dielectric response of polycrystalline Ba3CoSb2O9 was studied as a function of temperature (30 to 900 °C) and frequency (10 Hz to 10 MHz). The triple perovskite Ba3CoSb2O9 was successfully synthesized and characterized for structural and dielectric properties. The Rietveld analysis of the X-ray diffractogram confirms the formation of a hexagonal phase with P63/mmc symmetry. This centrosymmetric 3(BaCo1/3Sb2/3O3) perovskite shows structural similarity to a prototypical non-centrosymmetric relaxor ferroelectric, PbMg1/3Nb2/3O3. The dielectric constant, ε', follows a non-Debye Cole-Cole relation and exhibits anomalous responses such as: (a) a thermally activated colossal dielectric constant (>105) and (b) a highly dispersive peak maximum (523-853 K). The real part of ac conductivity, σ', also shows a change of approximately 6 orders in magnitude (10-8 to 10-2 S m-1). Validation of Jonscher's law and impedance (Nyquist plot) and modulus (M'') analyses indicate that hopping polarization is the predominant thermally activated mechanism. Moreover, the large value of ε' and its dispersion were found to be highly correlated with the underlying crystal structure and were attributed to the local ionic site ordering. The study suggests that the anomalous dielectric dispersion must have an intrinsic origin.

Thermally activated growth of ternary oxyhydroxides on perovskites for efficient water oxidation.

Perovskite oxides are promising catalysts for water oxidation. Herein, we constructed a Sr3CoFeWO9 triple perovskite with Co, Fe, and W atoms sharing octahedral positions. Thermally activated growth of an amorphous FeCoW oxyhydroxide layer on this perovskite pre-catalyst greatly enhanced the oxygen evolution reaction (OER) activities, reducing overpotential at 10 mA cm-2geo by 115 mV. This highlights the benefits of compositional design and structural reconstruction for efficient electrocatalytic materials.

Structural and electrical study of novel Ba3SrNb2O9 triple perovskite based solid electrolyte for LT-SOFCs

Solid Electrolytes (SOE) with high ionic conductivity highly desirable in order to improve the efficiency of SOFCs at lower functioning temperature range) (350–500 °C). Triple perovskite Ba3SrNb2O9 based proton ion conductor have up-and-coming to enhance ionic conductivity at Low temperature range (LT) (350–500 °C). With this motivation we have successfully synthesized Ba3SrNb2O9 (BSNO) by solgel combustion method. Powder X-ray diffraction (XRD) confirms the formation of Triclinic crystal structure having space group P1, having lattice dimensions (a = 5.89340 Å, b = 5.88760 Å, c = 7.27360 Å). Rietveld Refinement of XRD data was carried out to get detail structural information by Full-Prof suite software. Electrical performance of the BSNO system were systematically studied by Electrochemical Impedance spectroscopy at functioning temperature 350–500 °C with interval of 50 °C. BSNO system exhibit conductivity of the order of 5.8 × 10−3 Scm−1 at 500 °C with the activation energy of the range of 0.48 eV. Charge Relaxations phenomenon very systematically explored by impedance loss spectra and it is very correlate with Modulus (M’’) as a function of frequency at several temperatures which used to clarify the charge relaxation dynamics in proton ion conducting BSNO material.

Design Principles of a Novel Triple Perovskite Absorber for Efficiency Enhancement: An Optimization Study

Design Principles of a Novel Triple Perovskite Absorber for Efficiency Enhancement: An Optimization Study

Synergistic effect of perovskites and nitrogen-doped carbon hybrid materials for improving oxygen reduction reaction

A fundamental understanding of the electrochemical behavior of hybrid perovskite and nitrogen-doped (N-doped) carbon is essential for the development of perovskite-based electrocatalysts in various sustainable energy device applications. In particular, the selection and modification of suitable carbon support are important for enhancing the oxygen reduction reaction (ORR) of non-platinum group metal electrocatalysts in fuel cells. Herein, we address hybrid materials composed of three representative N-doped carbon supports (BP-2000, Vulcan XC-72 and P-CNF) with valid surface areas and different series of single, double and triple perovskites: Ba0.5Sr0.5Co0.8Fe0.2O3−δ, (Pr0.5Ba0.5)CoO3−δ, and Nd1.5Ba1.5CoFeMnO9−δ (NBCFM), respectively. The combination of NBCFM and N-doped BP-2000 produces a half-wave potential of 0.74 V and a current density of 5.42 mA cm−2 at 0.5 V versus reversible hydrogen electrode, comparable to those of the commercial Pt/C electrocatalyst (0.76 V, 5.21 mA cm−2). Based on physicochemical and electrochemical analyses, we have confirmed a significant improvement in the catalytic performance of low-conductivity perovskite catalyst in the ORR when nitrogen-doped carbon with enhanced electrical conductivity is introduced. Furthermore, it has been observed that nitrogen dopants play active sites, contributing to additional performance enhancement when hybridized with perovskite.

Highly sensitive fast-response near-infrared photodetectors based on triple cation Sn-Pb perovskite for pulse oximetry system

Highly sensitive fast-response near-infrared photodetectors based on triple cation Sn-Pb perovskite for pulse oximetry system

High-Temperature Synthesis of Ferromagnetic Eu3Ta3(O,N)9 with a Triple Perovskite Structure.

Europium tantalum perovskite oxynitrides were prepared by a new high-temperature solid-state synthesis under N2 or N2/H2 gas. The nitrogen stoichiometry was tuned from 0.63 to 1.78 atoms per Eu or Ta atom, starting with appropriate N/O ratios in the mixture of the reactants Eu2O3, EuN and Ta3N5, or Eu2O3 and TaON, which was treated at 1200 °C for 3 h. Two phases were isolated with compositions EuTaO2.37N0.63 and Eu3Ta3O3.66N5.34, showing different crystal structures and magnetic properties. Electron diffraction and Rietveld refinement of synchrotron radiation X-ray diffraction indicated that EuTaO2.37N0.63 is a simple perovskite with cubic Pm3̅m structure and cell parameter a = 4.02043(1) Å, whereas the new compound Eu3Ta3O3.66N5.34 is the first example of a triple perovskite oxynitride and shows space group P4/mmm with crystal parameters a = 3.99610(2), c = 11.96238(9) Å. The tripling of the c-axis in this phase is a consequence of the partial ordering of europium atoms with different charges in two A sites of the perovskite structure with relative ratio 2:1, where the formal oxidation states +3 and +2 are respectively dominant. Magnetic data provide evidence of ferromagnetic ordering developing at low temperatures in both oxynitrides, with saturation magnetization of about 6 μB and 3 μB per Eu ion for EuTaO2.37N0.63 and the triple perovskite Eu3Ta3O3.66N5.34 respectively, and corresponding Curie temperatures of about 7 and 3 K, which is in agreement with the lower proportion of Eu2+ in the latter compound.

Self-learning effect of CsFAMAPbIBr memristor achieved by electroforming process

Triple cation halide perovskite (TCHP) memristor as an artificial synaptic device is quite important in the realization of strong artificial intelligence. Normally, electroforming is needed before the realization of synaptic functions through resistive switching. Here, the electroforming process is developed to achieve the self-learning of strong artificial intelligence. An ultra-thin isolating modified layer polymethylmethacrylate (PMMA) was used to fabricate the FTO/TCHP/PMMA/Al memristor, while the mechanism of the self-learning process is also presented. In addition, a series of important synaptic functionalities including long-term potentiation, long-term depression and spike-rate-dependent plasticity are stimulated, which demonstrates the capacity of bio-synapse functions emulation of the device. The associative learning is also achieved with our artificial synapse. This work could be beneficial to the development of future neural morphological artificial intelligence with TCHP based synaptic device.

Radiation tolerance and self-healing in triple halide perovskite solar cells

The high tolerance and stability of triple halide perovskite solar cells is demonstrated in practical space conditions at high irradiation levels. The solar cells were irradiated for a range of proton energies (75 keV, 300 keV, and 1 MeV) and fluences (up to 4 × 1014 p/cm2). The fluences of the energy proton irradiations were varied to induce the same amount of vacancies in the absorber layer due to non-ionizing nuclear energy loss (predominant at <300 keV) and electron ionization loss (predominant at >300 keV). While proton irradiation of the solar cells initially resulted in degradation of the photovoltaic parameters, self-healing was observed after two months where the performance of the devices was shown to return to their pristine operation levels. Their ability to recover upon radiation exposure supports the practical potential of perovskite solar cells for next-generation space missions.

Optical properties investigation of Sr2CaFe2WO9 triple perovskite for optoelectronic applications

In this manuscript, Sr2CaFe2WO9 triple perovskite, in a powder state, has been studied in the context of these linear and nonlinear optical properties. This material was developed as a powder with a polycrystalline structure by a solid-state reaction. These optical properties were measured from transmittance and absorbance for wavelengths between 250 and 850 nm, using a UV-Visible spectroscopy at room temperature. The analysis of the optical results showed the possibility of using Sr2CaFe2WO9 in optoelectronic technology due to its optical properties suitable for this field. The transmittance and absorbance, absorption coefficient, band gap (Eg), Urbach energy, refractive index, optical conductivity, and dielectric function were investigated. The gap energy of the sample determined by the Tauc method is 3.06 eV, while the derivation of the absorption spectrum fitting (DASF) method showed that the studied material has a direct bandgap. The first and third-order nonlinear susceptibilities, as well as the static and nonlinear refractive indices, were also calculated for the studied powder. Sr2CaFe2WO9 can be exploited as a promising material for upgraded applications in optoelectronic applications, given its optical properties either linear or nonlinear.

Integrated capture and solar-driven utilization of CO2 from flue gas and air

Integrated capture and solar-driven utilization of CO2 from flue gas and air