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Structural, Optical, and Ferroelectric Behaviors of Cu1−x Li x O (0 ≤ x ≤ 0.09) Nanostructures

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

We report structural, optical, and ferroelectric behaviors of lithium-doped copper oxide (Cu1−x Li x O with x = 0.0, 0.05, 0.07, and 0.09) nanostructures synthesized by hydrothermal method. The XRD pattern indicates the pure phase formation of CuO without any impurity, and the crystallite size is found to be increases for x = 0–0.07 and decreases for x = 0.09. FESEM analysis shows that the average size of Cu1−x Li x O nanostructures increases with the increasing the Li-doping concentrations up to 7% and then decreases for 9% Li doping concentration. Moreover, Raman and photoluminescence spectrum also confirm the phase formation of CuO. A significant reduction in optical band gap is observed up to x = 0.07, and then band gap increases for x = 0.09 due to segregation of the impurities on the surface or grain boundaries, which may suppress the grain growth and results the enhancement in optical band gap. Moreover, a weak ferroelectricity is observed in CuO nanostructures for pure and 9% Li doping through polarization versus electric field (P–E).

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Acknowledgments

The authors would like to thank Prof. Ravi Kumar and technical staff of Department of Material Science & Engineering, NIT Hamirpur for providing technical support during FESEM and Raman measurements. The authors are also grateful to the Director, NIT Kurukshetra for providing the facilities in Physics Department.

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  1. Department of Physics, National Institute of Technology, Kurukshetra, 136119, India

    Prakash Chand, Anurag Gaur & Ashavani Kumar

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  1. Prakash Chand
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  2. Anurag Gaur
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  3. Ashavani Kumar
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Correspondence to Anurag Gaur.

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Chand, P., Gaur, A. & Kumar, A. Structural, Optical, and Ferroelectric Behaviors of Cu1−x Li x O (0 ≤ x ≤ 0.09) Nanostructures. Acta Metall. Sin. (Engl. Lett.) 27, 306–312 (2014). https://doi.org/10.1007/s40195-014-0046-2

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  • DOI: https://doi.org/10.1007/s40195-014-0046-2

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