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Structural, Optical and Electrical Conductivity Studies in Polycarbazole and its Metal Oxide Nano Composites

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Abstract

Polycarbazole (PCz) has been synthesized by chemical oxidation method using APS as an oxidizing agent and PCz/CuO and PCz/Fe2O3 nanocomposites by in situ polymerization method for different wt% of CuO and Fe2O3 at room temperature. XRD patterns confirmed crystalline nature of samples. FTIR indicated strong interaction between PCz and nano fillers. The morphological and optical absorption studies were carried out using SEM and UV–Vis respectively. Addition of CuO or Fe2O3 to PCz decreased its direct and indirect band gaps. However, band gap showed a small change with dopant contents up to 30%. Urbach energy decreased with the addition of dopants. But Urbach energy of the composites increased with increasing dopants content from 10 to 30%. DC conductivity of PCz and its nanocomposites has been measured by following two probe technique in the temperature range 300–423 K. The conductivity of both the nanocomposites is found to be less than the pure PCz and it is found to increase with wt% of CuO or Fe2O3 as the case may be. The activation energy has been determined by fitting Arrhenius expression to the dc conductivity data at high temperature. The activation energy of polycarbazole is determined to be less than that of the composites. In both the composites, activation energy decreased and conductivity increased with the increase of dopant content.

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  1. Department of Physics, Gulbarga University, Kalaburagi, 585106, India

    B. Raghavendra, T. Sankarappa & Amarkumar Malge

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Raghavendra, B., Sankarappa, T. & Malge, A. Structural, Optical and Electrical Conductivity Studies in Polycarbazole and its Metal Oxide Nano Composites. J Inorg Organomet Polym 32, 2416–2427 (2022). https://doi.org/10.1007/s10904-022-02358-1

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