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Article Dans Une Revue ACS Materials Au Année : 2021

Ferroelectricity and Piezoelectric Energy Harvesting of Hybrid A2BX4 -Type Halogenocuprates Stabilized by Phosphonium Cations

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Perovskite-structured compounds containing organic cations and inorganic anions have gained prominence as materials for next-generation electronic and energy devices. Hybrid materials possessing ferro-and piezoelectric properties are in recent focus for mechanical energy harvesting (nanogenerator) applications. Here, we report the ferroelectric behavior of A 2 BX 4-type halogenocuprate materials supported by heteroleptic phosphonium cations. These lead-free discrete Cu(II) halides [Ph3MeP]2[CuCl4 ] (1) and [Ph3MeP]2[CuBr4] (2) exhibit a remnant polarization (P r) of 17.16 and 26.02 μC cm-2 , respectively, at room temperature. Furthermore, flexible polymer films were prepared with various weight percentage (wt %) compositions of 1 in thermoplastic polyurethane (TPU) and studied for mechanical energy harvesting applications. A highest peak-to-peak voltage output of 25 V and power density of 14.1 μW cm-2 were obtained for the optimal 15 wt % 1-TPU composite film. The obtained output voltages were utilized for charging a 100 μF electrolytic capacitor that reaches its maximum charging point within 30 s with sizable stored energies and accumulated charges.
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hal-04408207 , version 1 (21-01-2024)

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Supriya Sahoo, Thangavel Vijayakanth, Premkumar Kothavade, Prashant Dixit, Jan K Zaręba, et al.. Ferroelectricity and Piezoelectric Energy Harvesting of Hybrid A2BX4 -Type Halogenocuprates Stabilized by Phosphonium Cations. ACS Materials Au, 2021, 2 (2), pp.124-131. ⟨10.1021/acsmaterialsau.1c00046⟩. ⟨hal-04408207⟩
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