High piezoresponse in low-dimensional inorganic halide perovskite for mechanical energy harvesting

Sahoo, Aditi; Paul, Tufan; Makani, Nisha Hiralal; Maiti, Soumen; Banerjee, Rupak

doi:10.1039/d2se00786j

Cited by 15 publications

(12 citation statements)

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“…Polarization reversal in the PCSI film is indicated by the local hysteresis loop, which is characterized by a 180° phase inversion (Figure b). Pr ( E ) = A ( E )cos[φ( E )] was used to calculate the piezoresponse hysteresis loop . The resulting piezoresponse loop of the PCSI film is asymmetric and is shown in Figure c.…”

Section: Resultsmentioning

confidence: 99%

“…The films were removed from the glasses and used to fabricate devices. To minimize the triboelectric effect, the as-fabricated nanogenerator devices were encapsulated in PDMS, according to our previous work . We substituted Cs 2 SnBr 6 and Cs 2 SnCl 6 perovskites for Cs 2 SnI 6 in the remaining composite samples while leaving all other parameters the same.…”

Section: Methodsmentioning

confidence: 99%

“…was used to calculate the piezoresponse hysteresis loop. 57 The resulting piezoresponse loop of the PCSI film is asymmetric and is shown in Figure 6c.…”

Section: Pr(e) = A(e)cos[φ(e)]mentioning

confidence: 99%

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Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs₂SnX₆-PVDF Composites

Paul

Sahoo

Maiti³

et al. 2023

ACS Appl. Mater. Interfaces

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The main challenges impeding the widespread use of organic−inorganic lead halide perovskites in modern-day technological devices are their long-term instability and lead contamination. Among other environmentally convivial and sustainable alternatives, Cs 2 SnX 6 (X = Cl, Br, and I) compounds have shown promise as ambient-stable, lead-free materials for energy harvesting, and optoelectronic applications. Additionally, they have demonstrated tremendous potential for the fabrication of self-powered nanogenerators in conjunction with piezoelectric polymers like polyvinylidene-fluoride (PVDF). We report on the fabrication of composites constituting solvothermally synthesized Cs 2 SnX 6 nanostructures and PVDF. The electroactive phases in PVDF were boosted by the incorporation of Cs 2 SnX 6 , leading to enhanced piezoelectricity in the composites. First-principles density functional theory (DFT) studies were carried out to understand the interfacial interaction between the Cs 2 SnX 6 and PVDF, which unravels the mechanism of physisorption between the perovskite and PVDF, leading to enhanced piezoresponse. The halide ions in the inorganic Cs 2 SnX 6 perovskites were varied systematically, and the piezoelectric behaviors of the respective piezoelectric nanogenerators (PENGs) were investigated. Further, the dielectric properties of these halide perovskite-based hybrids are quantified, and their piezoresponse amplitude, piezoelectric output signals, and charging capacity are also evaluated. Out of the several films fabricated, the optimized Cs 2 SnI 6 _PVDF film shows a piezoelectric coefficient (d 33 ) value of ∼200 pm V −1 and a remanent polarization of ∼0.74 μC cm −2 estimated from piezoresponse force microscopy and polarization hysteresis loop measurement, respectively. The optimized Cs 2 SnI 6 _PVDF-based device produced an instantaneous output voltage of ∼167 V, a current of ∼5.0 μA, and a power of ∼835 μW across a 5 MΩ resistor when subjected to periodic vertical compression. The output voltage of this device is used to charge a capacitor with a 10 μF capacitance up to 2.2 V, which is then used to power some commercial LEDs. In addition to being used as a pressure sensor, the device is employed to monitor human physiological activities. The device demonstrates excellent operational durability over a span of several months in an ambient environment vouching for its exceptional potential in application to mechanical energy harvesting and pressure sensing applications.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs₂SnX₆-PVDF Composites

Paul

Sahoo

Maiti³

et al. 2023

ACS Appl. Mater. Interfaces

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“…Similarly, the phase was observed to switch from −12.72 to 161.57° within the applied bias range of ±10 V. This confirms that the polarization in the domains switches under the application of an external electric field. The PR was calculated and plotted using the equation, PR( E ) = A ( E ) cos(ϕ( E )) . The PR hysteresis loop (Figure c) also indicates the existence of ferroelectricity .…”

Section: Resultsmentioning

confidence: 99%

“…The PR was calculated and plotted using the equation, PR(E) = A(E) cos(ϕ(E)). 76 The PR hysteresis loop (Figure 9c) also indicates the existence of ferroelectricity. 77 The origin of piezoelectricity in Rb 4 Ag 2 BiBr 9 may be attributed to the polarity induced intrinsically in the Ag−Br and Bi−Br polyhedrons due to the electronegativity difference between Ag/Bi and Br (Br−Ag = 1.03 and Br−Bi = 0.94).…”

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High Ionic Conduction and Polarity-Induced Piezoresponse in Layered Bimetallic Rb₄Ag₂BiBr₉ Single Crystals

et al. 2022

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The emergence of lead-free metal-halide perovskites in modern-day energy research is primarily due to their competent semiconducting and optoelectronic properties, as well as their nontoxicity and improved stability in ambient operating conditions. However, a detailed understanding of ion transport dynamics and the relaxation behavior of these materials is still elusive. In this article, we report on the single-crystal (SC) growth of a bimetallic two-dimensional layered Rb4Ag2BiBr9 and explore its dielectric, piezoelectric, and ferroelectric properties. The dielectric attributes are investigated by studying the temperature-dependent complex impedance, complex electric modulus, and AC conductivity over an extensive frequency range from 4 Hz to 8 MHz. The role of grain and grain boundaries in the effective impedance is established using the Maxwell–Wagner equivalent circuit model from the Nyquist plots. The observed electric modulus spectra are studied using the Havriliak–Nigami and the Kohlrausch–Williams–Watts formalisms to understand the ionic transport and relaxation mechanisms in Rb4Ag2BiBr9. The DC conductivity and relaxation time show Arrhenius-like behavior with the inverse temperature validating the hopping motion of ions. The values of the activation energy required for ion hopping are calculated independently from the relaxation time, hopping frequency, and DC conductivity Arrhenius plots and are in good agreement with a value of 0.47 eV. The scaling of the temperature-dependent conductivity and electric modulus spectra into a single master curve demonstrates the congruence of the ionic conduction and the relaxation phenomena at different temperatures for Rb4Ag2BiBr9. This SC demonstrates decent thermal and ambient stability up to 500 °C and 12 months, respectively. The pristine orthorhombic Rb4Ag2BiBr9 SC shows a piezoelectric amplitude value of ∼564 pm at the maximum applied bias (±10 V), and a saturation polarization of ∼0.14 nC/cm2 estimated from the piezoelectric force microscopy and polarization hysteresis loop measurement, respectively. The ferroelectric and semiconducting attributes of this material can be harnessed for prospective applications as a thin film in designing mechanical energy harvesters as well as functional photoferroelectrics, such as optical switches and ferroelectric photovoltaics.

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Electrospinning of porous polyvinylidene fluoride microspheres alloyed fibrous membrane with enlarged strain for efficient piezoelectric energy harvesting

Zhang,

Shao,

Liu

et al. 2024

Journal of Polymer Science

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Piezoelectric energy harvesters (PEHs) developed from electrospun polyvinylidene fluoride (PVDF) fibers offer flexibility and superior piezoelectric output, making them promising for self‐powered systems and sensors. Nonetheless, the electromechanical conversion efficiency of conventional electrospun PVDF fibers is impeded by their limited pressure‐strain range. Herein, elastic porous PVDF microspheres are introduced in‐situ via electrospinning to craft a piezoelectric membrane with higher compressive strain. The PVDF microspheres are uniformly embedded between the fibers in a sandwich fashion, and their dimension is easily tunable by varying spinning solution's concentration. Moreover, the micropores on the PVDF microspheres created by removing pre‐mixed SiO2 template not only elevates the β crystal content of PVDF to 82.19%, but also improves the compressibility, significantly boosting the piezoelectric output. The microsphere alloyed PVDF PEH delivers a piezoelectric output of 33.0 V and a power density of 8 μW/cm2, over 5.8 times that of conventional electrospun PVDF membrane, and can consistently charge lithium‐ion batteries. Our research unveils a novel strategic path to modify fiber structured PEHs, advancing their applications in self‐powered systems.

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High piezoresponse in low-dimensional inorganic halide perovskite for mechanical energy harvesting

Abstract: The potential use of halide perovskite materials in ferroelectric and piezoelectric devices has recently been unraveled, but for widespread applications, detailed and systematic experiments are essential. We report on a...

Cited by 15 publications

References 58 publications

Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs₂SnX₆-PVDF Composites

Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs₂SnX₆-PVDF Composites

High Ionic Conduction and Polarity-Induced Piezoresponse in Layered Bimetallic Rb₄Ag₂BiBr₉ Single Crystals

Electrospinning of porous polyvinylidene fluoride microspheres alloyed fibrous membrane with enlarged strain for efficient piezoelectric energy harvesting

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High piezoresponse in low-dimensional inorganic halide perovskite for mechanical energy harvesting

Abstract: The potential use of halide perovskite materials in ferroelectric and piezoelectric devices has recently been unraveled, but for widespread applications, detailed and systematic experiments are essential. We report on a...

Cited by 15 publications

References 58 publications

Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs2SnX6-PVDF Composites

Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs2SnX6-PVDF Composites

High Ionic Conduction and Polarity-Induced Piezoresponse in Layered Bimetallic Rb4Ag2BiBr9 Single Crystals

Electrospinning of porous polyvinylidene fluoride microspheres alloyed fibrous membrane with enlarged strain for efficient piezoelectric energy harvesting

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Product

Resources

About

Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs₂SnX₆-PVDF Composites

Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs₂SnX₆-PVDF Composites

High Ionic Conduction and Polarity-Induced Piezoresponse in Layered Bimetallic Rb₄Ag₂BiBr₉ Single Crystals