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Freestanding epitaxial ferroelectric films. (aec) The epitaxial thin films of Pb(Zr 0.2 Ti 0.8 )O 3 ferroelectric films are grown on lattice-matched SrTiO 3 substrates with a La 0.7 Sr 0.3 MnO 3 sacrificial layer. Subsequently, the La 0.7 Sr 0.3 MnO 3 layer is wet etched. (def) Process schematic for heterostructure growth, oxide membrane release and transfer the freestanding perovskite single-crystal films with a Sr 3 Al 2 O 6 sacrificial layer. (geh) The released ferroelectric layers are transferred onto flexible substrate. Panel a-c reprinted with permission from ref 49. Copyright 2015, Rights Managed by Nature Publishing Group. Panel d-f reprinted with permission from ref 51. Copyright 2016, Rights Managed by Nature Publishing Group. Panel g-h reprinted with permission from ref 50. Copyright 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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Many perovskite oxide ferroelectrics (e.g. PbZr1-xTixO3, BaTiO3, LiNbO3) are born with multitudinous robust performances and have been widely used in sensors, actuators, surface acoustic wave devices, and memories et al. However, their hardness, brittleness and harsh synthesis conditions (i.e. high temperature and oxygen ambience) restrain their ap...
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Context 1
... 3 epitaxial film can be grown on the hard SrTiO 3 substrate, separated by etching sacrificial layer (e.g. La 0.7 S r0.3 MnO 3 , Sr 3 Al 2 O 6 ) and then transferred onto the organic substrate to prepare flexible electronics [49,50], which is named as Method 4 here. For example, Fig. 6a-c illustrates the process of complex perovskite oxide films integration on the flexible substrate. The (001) SrRuO 3 / Pb(Zr 0.2 Ti 0.8 )O 3 /SrRuO 3 sandwich capacitor was grown on the thin La 0.7 S r0.3 MnO 3 coated SrTiO 3 substrate by using pulsed laser deposition (PLD) method. The La 0.7 S ...
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... that can be etching by de-ionized water, many perovskite oxide epitaxial films can be prepared on the hard SrTiO 3 substrate and then transferred onto organic substrate too [51,52], as shown in Fig. 6d-f. The key is the epitaxial growth of water-soluble Sr 3 Al 2 O 6 on perovskite substrates before various perovskite oxide thin films are grown on Sr 3 Al 2 O 6 buffer layers. These films were immersed in de-ionized water at room temperature to separate the films from their mother substrates. To mechanically stabilize the films and to ...
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... PDMS as an elastomer support layer was coated on the film surface before the release. In a word, millimeter-size single-crystalline oxide films are achieved by etching either La 0.7 S r0.3 MnO 3 or Sr 3 Al 2 O 6 sacrificial layer, and thus these freestanding films can be further transferred onto flexible substrates to prepare flexible electronics (Fig. ...
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Inorganic ferroelectric perovskite oxides are more stable than hybrid perovskites. However, their solar energy harvest efficiency is not so good. Here, by constructing a series of BiFeO3-based devices (solar cells), we investigated three factors that influence the photovoltaic performance, including spontaneous polarization, terminated ions species...
A great deal of interest has grown in both academia and industry toward flexible multiferroics in the recent years. The coupling of ferromagnetic properties with ferroelectric properties in multiferroic materials opens up many opportunities in applications such as magnetoelectric random access memories, magnetic field sensors, and energy harvesters...
Citations
... Additionally, 2D materials are exceptionally thin and flexible, allowing easy integration onto curved surfaces or flexible substrates. This property is well-suited for wearable devices and flexible electronics [18]. The absence of dangling bonds on the surface of 2D materials enables versatile combinations with other materials through van der Waals (vdw) forces, facilitating the design of complex device structures as required [19]. ...
Photodetectors are essential optoelectronic devices that play a critical role in modern technology by converting optical signals into electrical signals, which are one of the most important sensors of the informational devices in current ‘Internet of Things’ era. Two-dimensional (2D) material-based photodetectors have excellent performance, simple design and effortless fabrication processes, as well as enormous potential for fabricating highly integrated and efficient optoelectronic devices, which has attracted extensive research attention in recent years. The introduction of spontaneous polarization ferroelectric materials further enhances the performance of 2D photodetectors, moreover, companying with the reduction of power consumption. This article reviews the recent advances of materials, devices in ferroelectric-modulated photodetectors. This review starts with the introduce of the basic terms and concepts of the photodetector and various ferroelectric materials applied in 2D photodetectors, then presents a variety of typical device structures, fundamental mechanisms and potential applications under ferroelectric polarization modulation. Finally, we summarize the leading challenges currently confronting ferroelectric-modulated photodetectors and outline their future perspectives.
... Magnetite (Fe 3 O 4 ), a half-metal, is known to display the ANE for thermoelectric power generation [18,19]. In contemporary materials science research, oxide perovskites (ABO 3 ) continue to hold significant interest due to their diverse functionalities like piezoelectricity and ferroelectricity [20], optical [21], photocatalysis [22,23], ionic conduction [24], half-metallicity and magnetoresistance [3,25,26]. The largest TMR of 1800% at 4 K has been achieved in perovskite manganite tunnel junction [27]. ...
Oxide perovskites continue to promote research interest because of their concurrent use in spintronic and thermoelectric applications. The electronic, magnetic, and thermoelectric properties of new half-metallic BaInO 3 perovskite are investigated within the density functional theory. The structural and thermodynamic stability of the proposed perovskite is provided by the tolerance factor, octahedral factor, formation energy, and phonon dispersion curves. The structural relaxation curves reveal the ground state magnetic phase to be ferromagnetic. The GGA and mBJ band structure plots show that the half-metallicity exclusively results from the strong exchange splitting of 2p-bands at the Fermi level. Compared with PBE, mBJ depicts highly localized magnetic moments around oxygen along with enhanced half-metallic gaps and band gaps in the spin-up channel. Under a compressive strain, the system undergoes a magnetic phase transition from half-metallic ferromagnet to non-magnetic metal at 30 GPa. The elastic stability at the studied pressure range has been verified from Blackman’s and Every’s diagrams. The material remains ductile and exhibits moderate elastic anisotropy in the studied pressure range. The quasi-harmonic Debye model is employed to study the temperature and pressure effects of thermodynamic parameters. The computed transport properties including the Seebeck coefficient and spin-Seebeck coefficient predict reasonable thermoelectric performance in generating thermally induced spin-polarized current and spin current, respectively. Such a detailed study of this material could open prospects in spintronic as well as waste energy recovery devices.
... This ceramic material has garnered attention for many potential applications because of its dielectric, thermal, and photocatalytic characteristics. Because of the notable characteristics of ZnSnO 3 , including its elevated electron mobility of 15 cm 2 V −1 s −1 and surface work function of 3.6 eV, it presents a viable option for use as a photoanode in DSSCs [29]. The enhancement of photoanode performance can be achieved by implementing different methodologies, such as doping, morphological alterations, interfacial modifications, TiCl 4 post-treatment, and interfacial engineering [30]. ...
A novel approach for modifying zinc stannate nanomaterials involves using a bio-extract derived from the leaves of Hibiscus rosa-sinensis. Ag nanomaterial and biomolecule sensitization was conducted in a single pot. The composite materials of Ag and biomolecules were characterized using powder X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy analysis to determine their structural aspects. Based on the PXRD results, it was determined that the composites exhibit a face-centered cubic structure. The observed frequencies of C − H and Sn − O stretching in the FT-IR spectra indicate the existence of biomolecules within the composite material. Furthermore, the X-ray photoelectron spectroscopy findings validate the coordination of zinc and tin within the zinc stannate compound with biomolecules while indicating silver’s presence on the surface. Scanning electron microscopy and transmission electron microscopy techniques have revealed the material’s porous characteristics and reduction in size of the zinc stannate particles. In addition, the results demonstrated the spherical morphology of the silver particles that have undergone doping. Surface agglomeration and optical characteristics were investigated using UV–Vis spectroscopy. The observed phenomenon exhibits pronounced particle agglomeration resulting from biomolecules on the surface. In addition, the emergence of an additional absorption band at approximately 453 nm can be attributed to silver’s surface plasmon resonance effect. The obtained J–V curve for all samples demonstrates the observed enhancements, resulting from incorporating Ag and biomolecules. The enhancements observed in the simulation results were further confirmed through the validation process, which demonstrated the extended absorption and surface plasmon resonance effect.
Graphical Abstract
... Out of numerous functional materials, traditional perovskite oxides have a broad spectrum of application capabilities that are significantly related to common domestic applications. The commercial usage of perovskites is covered but not limited to many areas such as microelectronics, memories, sensors, storage systems, energy harvesting, mechanical processing, piezoelectric actuators, ultrasonic energy converters, optical and numerous other related devices [6]. The search for robust ferroelectric material concluded with the recognition of perovskite materials specially first and second order transition materials [7]- [9]. ...
In this article, we have studied passive voltage amplification in FE-FE-DE heterostructure. We have stacked two different ferroelectric oxides; one is second-order transition ferroelectric material (continuous transition ferroelectric material) and the other is first-order transition ferroelectric material (discontinuous transition ferroelectric material). Both ferroelectric materials have different polarities of anisotropy constant (β), which is tuned by varying the ferroelectric thickness and thus leads to its cancellation. The nullification of the anisotropy constant will reduce the non-linearity of the ferroelectric oxide and provide efficient matching between the ferroelectric and dielectric capacitance, which in turn delivers the higher voltage amplification in the heterostructure. Also, dynamic response and temperature analysis of heterostructure are studied further. It is observed that dielectric when added in series with the isolated ferroelectric capacitor the curie temperature shifts to a lower value.
... Among the numerous metal oxides, perovskite-type mixed oxides ABO 3 (especially with B = Ti and A = Ca, Ba, Sr), are one of the most extensively investigated functional materials with outstanding physical and chemical properties. These compounds adopted preferential applications such as pigments, lithium-ion batteries, sensors, magnetic recording media, high-density data storage, catalysts, etc. [43][44][45][46]. The perovskite oxides are considered great efficient photocatalysts under visible light and UV-Vis light irradiation with particular photochemical stability because of their inimitable crystal structures, electronic properties, and semiconductivity [47,48]. ...
... Structure of perovskite barium titanate.(Gao et al., 2019). ...
Barium titanate (BaTiO3) is a compound that has a structure called perovskite. Synthesis of BaTiO3 can be done by employing separate methods. BaTiO3 has four polymorphs which are cubic, tetragonal, orthorhombic and rhombohedral, depending on the temperature, it has a tetragonal structure at ambient temperature. This paper aims to review different synthesis methods of BaTiO3, these techniques can be used in the process of making ceramics as a molding material and also as an intermediate between thin films of metal oxides in various applications. The characterization techniques mostly used in determining the lattice constant, crystal structure functional group, morphology, elemental compositions and electrical properties, of the nanomaterial, including the various applications of BaTiO3 which includes modern electronic appliances and electrical power systems, the Multilayer Ceramic Capacitors (MLCs), biological, and microwave absorption, due to their piezoelectric and dielectric properties are reviewed.
... Наиболее обширным классом веществ, проявляющих подобные свойства, являются перовскиты. В них центральный анион может иметь устойчивое положение, несколько смещенное из геометрического центра ячейки, при этом он может перескакивать между двумя симметричными относительно центра ячейки позициями при приложении внешнего напряжения, что будет изменять поляризацию ячейки [1][2][3][4]. Позднее было обнаружено, что оксид гафния также проявляет сегнетоэлектриче-ские свойства, но только в орторомбической фазе, которая сама по себе не устойчива, однако может быть в достаточной мере стабилизирована подбором электродов и производственных параметров, а также исследовались вопросы использования различных допантов [5][6][7]. ...
The work is devoted to the study of the process of changing the polarization of hafnium oxide crystals in the orthorhombic phase associated with the gradual weakening of the polarization effects in FeRAM elements based on thin films of hafnium oxide HfO 2 . To solve the problem, quantum-mechanical calculations of the structure of orthorhombic hafnium oxide were carried out, a possible way of crystal rearrangement during a change in polarization upon application of voltage was identified, and its optimization was carried out using the elastic band method. The values of the polarization change and the energy barrier of the corresponding transition are obtained. A study of the stability of this transition has been carried out. The results of a series of computational experiments using high-performance computing systems of hybrid architecture based on the Center for Collective Use of the FRC IU RAS are presented. An analysis of the results shows that, despite the low energy barrier of the transition, the probability of a spontaneous change in polarization is low due to the impossibility of changing the polarization of an individual cell without taking into account the influence of the polarizations of neighboring cells.
... A particular emphasis was placed on the effect of the electrocatalytic mechanism of lattice oxygen intermediates (LOM) with adsorbed -OO and lattice O vacancies [44], which endow these perovskites with ultra-high catalytic activity. Several other review papers have been focused on the perovskites' sensory applications based on their ferroelectric, ferromagnetic, optical, and electrical properties [45][46][47][48]. ...
The importance of biomarker quantification in technology cannot be overstated. It has numerous applications in medical diagnostics, drug delivery, and the timely implementation of prevention and control strategies for highly prevalent diseases worldwide. However, the discovery of new tools for detection has become increasingly necessary. One promising avenue is the use of perovskite-based materials, which exhibit excellent catalytic activity and redox properties. These make them ideal candidates for the development of electrochemical sensors. In this review, the advances of purely non-enzymatic electrochemical detection of bio-analytes, with ABO3 perovskite form, are presented. The work allows the visualization of some of the modifications in the composition and crystal lattice of the perovskites and some variations in the assembly of the electrodes, which can result in systems with a better response to the detection of analytes of interest. These findings have significant implications for improving the accuracy and speed of biomarker detection, ultimately benefiting patients and healthcare professionals alike.
... Oxide perovskites are fascinating materials with extensive applications owing to their intrinsic ferroelectric, antiferroelectric, and piezoelectric properties 1 . Halide perovskites are of high interest due to their impressive efficiencies in solar cells 2,3 , and attractive applications in optoelectronics, electrocatalysis, and thermoelectrics [4][5][6] . ...
Anharmonicity and local disorder (polymorphism) are ubiquitous in perovskite physics, inducing various phenomena observed in scattering and spectroscopy experiments. Several of these phenomena still lack interpretation from first principles since, hitherto, no approach is available to account for anharmonicity and disorder in electron–phonon couplings. Here, relying on the special displacement method, we develop a unified treatment of both and demonstrate that electron–phonon coupling is strongly influenced when we employ polymorphous perovskite networks. We uncover that polymorphism in halide perovskites leads to vibrational dynamics far from the ideal noninteracting phonon picture and drives the gradual change in their band gap around phase transition temperatures. We also clarify that combined band gap corrections arising from disorder, spin-orbit coupling, exchange–correlation functionals of high accuracy, and electron–phonon coupling are all essential. Our findings agree with experiments, suggesting that polymorphism is the key to address pending questions on perovskites’ technological applications.
... In particular case when A and B are transition metals (TM) these are known as transition metal-based perovskites (Cheong & Mostovoy 2007). TM-based perovskites have gain considerable attention due to flexibility in spintronic devices, magnetocouplers, actuators and optoelectronic sensors (Gao et al. 2020;Iqbal et al. 2022a;Zafar et al. 2022). PrAO 3 are among those perovskites which have gain recent attention due to aforementioned applications as ferromagnetic materials (El Amine Monir & Dahou 2020;Eyring 1979;Shpanchenko et al. 2004). ...
In this work, we conduct a comprehensive theoretical investigation of magnetic perovskites PrAO3 using density functional theory, exploring their structural, elastic, mechanical, thermal, and electronic attributes under pressure conditions from 0 to 50 GPa. Our findings reveal the stability of the studied structures, meeting standard criteria such as energy optimizations, tolerance factor, mechanical stability, and enthalpy of formation. Notably, the structural parameters show excellent reliability, especially under ambient conditions, while the modulus of elasticity demonstrates enhanced structural stability with pressure linearly. We observe a decrease in anharmonicity and an increase in thermal conductivity under pressure. Additionally, the compounds exhibit a ductile nature with improved conducting properties. In the realm of electronic properties, the Moss–Burstein shift and a band gap transition from indirect to direct phase are observed, indicating potential applications in fast magneto-optical switches, electrochromic and spintronic devices.
