Dielectric and ferroelectric investigations of barium doped double perovskite Pb2BiVO6 for electronic and optical devices

Parida, R.K.; Pattanayak, D.; Mohanty, Bhagyashree; Parida, B. N.

doi:10.1016/j.matchemphys.2019.04.051

Cited by 14 publications

(4 citation statements)

References 54 publications

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“…The light-induced dielectric and conductivity relaxation in Cs 3 Bi 2 Cl 9 SCs were investigated by MS. This is a very powerful technique for investigating the dynamical properties (capacitance, permittivity, conductance, and loss factor) of the materials. − In our study, we have performed impedance spectroscopy to obtain modulus values in dark, with light exposure and after light off to investigate the frequency-dependent real and imaginary part of the modulus, as shown in Figure a,b …”

Section: Results and Discussionmentioning

confidence: 99%

Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs₃Bi₂Cl₉ Perovskite Single Crystals

Tailor

Satapathi

2021

J. Phys. Chem. C

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Photosensitive dielectric and conductivity relaxation was observed in all inorganic lead-free Cs3Bi2Cl9 perovskite single crystals. Using impedance and modulus spectroscopy in dark and with subsequent light-on and -off conditions, a reversible shift in modulus peak frequencies was observed. Relevant phenomenological methods based on modified Cole–Cole- and Debye-type relaxation models were applied to analyze the light-sensitive dielectric and conductivity behavior. The detailed analysis of this reversible change in modulus spectra confirms the light-induced trap-assisted reversible dipolar relaxation phenomena in Cs3Bi2Cl9 crystals. The conductivity follows Jonscher’s power law, and the value of power “n” was found to be ∼1, which further validates the Debye-type relaxation process. Our study provides an in-depth understanding and new insights into the dielectric and conductivity relaxation mechanism in perovskite single crystals, which motivates the future design of the perovskite single crystal-based energy storage devices.

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Section: Results and Discussionmentioning

confidence: 99%

Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs₃Bi₂Cl₉ Perovskite Single Crystals

Tailor

Satapathi

2021

J. Phys. Chem. C

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“…With temperature increase, admittance rises throughout the whole frequency range (due to enhanced ion migration and/or carrier conductivity within the field), which results in the rise in conduction over the entire frequency range. The presence of a NTCR nature in the material is further supported by the investigation since conductivity rises with temperature [18,28].…”

Section: Resultsmentioning

confidence: 52%

“…Dielectric spectroscopy is widely used to investigate the AC conductivity and dielectric relaxation across a large frequency and temperature range [16]. Multiple parametric techniques, such as electrical modulus, complex impedance, AC conductivity, and dielectric permittivity, can investigate dielectric characteristics [17][18][19][20]. In the subject of dielectric behavior, the qualitative representation typically gives the most up-to-date information [15,[21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Temperature-activated dielectric relaxation in lead-free halide perovskite single crystals

Paul¹,

Tailor²,

Mahapatra³

et al. 2022

J. Phys. D: Appl. Phys.

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Lead-free metal-halide perovskites have recently appeared as a promising candidate in optoelectronics and photovoltaics because of their non-toxicity, stability, and unique photophysical properties. Much scientific research has been done on optoelectronic characteristics and photovoltaic applications of lead-free perovskites, but the dielectric characteristics and insight into the relaxation phenomenon remain elusive. Here, we study the dielectric relaxation and conduction mechanism in the single crystalline (SC) A3Bi2X9 (A = MA+/FA+) perovskite using temperature-dependent electrochemical impedance spectroscopy in correlation with the modulus spectroscopy. With increasing temperature, the peak of −Z″(ω) shifts toward a high-frequency regime which specifies the thermally dependent relaxation mechanism in both crystals. The activation energy was estimated as 381 meV for MA3Bi2I9 (MBI) crystal and 410 meV for the FA3Bi2I9 (FBI) crystal suggesting hopping of mobile ions between lattice sites. The connected orientational polarization with the thermal motion of molecules leads to the enhancement in the dielectric constant (ϵ′) with temperature. The ϵ″(ω) in these crystals shows the significant ionic conductivity with a typical 1/fγ type characteristics (in the low-frequency regime) where γ is found to be in the range of 0.93–1.0 for MBI crystal and 0.88–0.98 for FBI crystal. The correlated imaginary part of impedance (−Z″) and modulus (M″) demonstrate the temperature-activated delocalized relaxation (non-Debye toward the Debye type) in these crystals. Stevels model suggests that the contribution of traps reduces with temperature rise and therefore conductivity enhances. Our study provides a comprehensive analysis and in-depth knowledge about the dielectric and conductivity relaxation mechanism in these lead-free perovskite SCs, which will help to implement efficient energy storage devices using these materials.

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“…Increased oxygen vacancies in double perovskites may affect the conductivity, which is good for electrochemical performance [21]. The dopants and synthesis processes affect the unusual physical properties of the double perovskites.The improved dielectric properties and transport mechanism in the double perovskite may be suitable for multilayer capacitors, memory, and microelectronic devices [22][23][24]. In this connection, we have gone through the journal article of cerium doped NiFe2O4 ferrite which fabricated by solid state reaction technique and this material was reported by Shirsath et al (2011).…”

Section: Introductionmentioning

confidence: 99%

Microstructural and dielectric characteristics of the Ce-doped Bi\(_{2}\)FeMnO\(_{6}\)

SAHOO,

BEHERA,

SINGH

et al. 2024

J Met Mater Miner

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A double-perovskite material Bi2FeMn0.94Ce0.06O6 (BFMCO) was synthesized by solid state reaction technique and characterized it by various techniques (structural, microstructural, dielectric, impedance and modulus properties). The material has an orthorhombic crystal structure with an average crystallite size of 52.4 nm, as revealed by X-ray diffraction data (XRD). The scanning electron microscope (SEM) image shows the presence of nano rod-shaped grains and well-defined grain boundaries in this material, with an average grain size of 21.8 µm. The Energy dispersive X-ray (EDX) analysis and color mapping confirm the purity and the composition of the material. The dielectric, impedance and modulus properties are investigated in the temperature range of 25℃ to 500℃ and frequency range of 1 kHz to 1 MHz. The material exhibits a high dielectric constant at low frequency region and a low dielectric loss, which make it a suitable candidate for better energy storage devices. The impedance study reveals the negative temperature coefficient of resistance (NTCR) behavior of the material. The modulus study indicates the non-Debye relaxation of the material. The semi-conducting nature of the material is verified by the semi-circular arcs observed in both Nyquist and Cole-Cole plots. Thermally activated conduction mechanism is confirmed from ac conductivity study.

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Dielectric and ferroelectric investigations of barium doped double perovskite Pb2BiVO6 for electronic and optical devices

Cited by 14 publications

References 54 publications

Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs₃Bi₂Cl₉ Perovskite Single Crystals

Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs₃Bi₂Cl₉ Perovskite Single Crystals

Temperature-activated dielectric relaxation in lead-free halide perovskite single crystals

Microstructural and dielectric characteristics of the Ce-doped Bi\(_{2}\)FeMnO\(_{6}\)

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Dielectric and ferroelectric investigations of barium doped double perovskite Pb2BiVO6 for electronic and optical devices

Cited by 14 publications

References 54 publications

Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs3Bi2Cl9 Perovskite Single Crystals

Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs3Bi2Cl9 Perovskite Single Crystals

Temperature-activated dielectric relaxation in lead-free halide perovskite single crystals

Microstructural and dielectric characteristics of the Ce-doped Bi\(_{2}\)FeMnO\(_{6}\)

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Product

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Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs₃Bi₂Cl₉ Perovskite Single Crystals

Photosensitive Dielectric and Conductivity Relaxation in Lead-Free Cs₃Bi₂Cl₉ Perovskite Single Crystals