Temperature-dependent dielectric properties of CsPb2Br5: a 2D inorganic halide perovskite

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dc.contributor.author Sahoo, Aditi
dc.contributor.author Paul, Tufan
dc.contributor.author Maiti, Soumen
dc.contributor.author Banerjee, Rupak
dc.coverage.spatial United Kingdom
dc.date.accessioned 2022-02-11T08:02:48Z
dc.date.available 2022-02-11T08:02:48Z
dc.date.issued 2022-05
dc.identifier.citation Sahoo, Aditi; Paul, Tufan; Maiti, Soumen and Banerjee, Rupak, “Temperature-dependent dielectric properties of CsPb2Br5: a 2D inorganic halide perovskite”, Nanotechnology, DOI: 10.1088/1361-6528/ac4fe5, vol. 33, no. 19, May 2022. en_US
dc.identifier.issn 0957-4484
dc.identifier.issn 1361-6528
dc.identifier.uri https://doi.org/10.1088/1361-6528/ac4fe5
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/7507
dc.description.abstract Two dimensional (2D) CsPb2Br5 have been successfully synthesized via the chemical precipitation method. Detailed structural, morphological, optical, and dielectric studies of these materials have been performed. These 2D CsPb2Br5 plates (of thickness around 200-300 nm) are ascribed to a tetragonal lattice system with I4/mcm space group. The dielectric attributes such as dielectric constant, electrical modulus, loss factor, and the DC, and AC conductivities, are observed to be varying appreciably with temperature over an extensive frequency window of 10 Hz -50 MHz. The Nyquist plots are investigated using the Maxwell-Wagner equivalent circuit model, which shows the impact of grains and grain boundaries on the overall impedance. Both the free charge conductivity and space charge increase with an increment in temperature, as revealed from the modified Cole-Cole plot. The relaxation time and relaxation mechanism of 2D CsPb2Br5 are estimated using the Kohlrausch-Williams-Watts (KWW) equation. Variation in DC conductivity and relaxation time, as a function of temperature, closely resembles Arrhenius' behavior. Value of activation energy calculated from the DC conductivity corroborates with the same derived from relaxation time. The observation of high dielectric constant and nominal dielectric loss for CsPb2Br5 perovskite offers enormous potential in energy harvesting and storage devices.
dc.description.statementofresponsibility by Aditi Sahoo, Tufan Paul, Soumen Maiti and Rupak Banerjee
dc.format.extent vol. 33, no. 19
dc.language.iso en_US en_US
dc.publisher IOP Publishing en_US
dc.subject CsPb2Br5 en_US
dc.subject Chemical precipitation en_US
dc.subject AC conductivities en_US
dc.subject Nyquist plots en_US
dc.subject Maxwell-Wagner equivalent en_US
dc.subject Cole-Cole plot en_US
dc.title Temperature-dependent dielectric properties of CsPb2Br5: a 2D inorganic halide perovskite en_US
dc.type Article en_US
dc.relation.journal Nanotechnology

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