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Structural, Thermal, and Electrical Behavior of Cu-Substituted KPbI3 Ternary Compound

  • COLLOID CHEMISTRY AND ELECTROCHEMISTRY
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Abstract

Series of ion conducting system (KI)4 – x‒(CuI)x‒PbI2, x = 0.0‒0.4, have been prepared by solid state reaction method and studied by powder X-ray diffraction, DTA techniques and conductivity measurements. Room temperature XRD reveals the presence of the orthorhombic KPbI3 as the major component in the sample. The X-ray diffraction analysis also confirms the presence of both KI and CuPbI3 in the samples. DTA of x = 0.0 composition shows an endothermic peak at 349°C attributed to the melting of the compound. AC impedance spectroscopy revealed that the contribution of grain is strong over the grain boundary. The addition of CuI content results in the increase of electrical conductivity of the samples. The maximum ionic conductivity σ = 6.33 × 10–1 S cm–1 was shown by x = 0.3 composition at 633 K with lowest activation energy of ~0.11eV in the temperature range of 298‒633 K.

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ACKNOWLEDGMENTS

The authors are indebted to the Chairman, Department of Chemistry for providing all facilities which were recommended for the research work and UGC, New Delhi, India for the commercial support. We are also thankful to the Applied Physics Department, AMU Aligarh for making XRD technique available for structural analysis of the samples.

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  1. Physical Chemistry Division, Department of Chemistry, Aligarh Muslim University, 202002, Aligarh, India

    Suhail Iqbal Wani &  Rafiuddin

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  1. Suhail Iqbal Wani
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  2. Rafiuddin
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Correspondence to Rafiuddin.

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Suhail Iqbal Wani, Rafiuddin Structural, Thermal, and Electrical Behavior of Cu-Substituted KPbI3 Ternary Compound. Russ. J. Phys. Chem. 92, 2811–2816 (2018). https://doi.org/10.1134/S0036024418130332

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