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Ferroelectric and photoluminescent properties of Eu3+-doped Bi4Ti3O12 films prepared via the spin-coating method

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Abstract

In this study, the films of Bi4−xEuxTi3O12 (x = 0, 0.2, 0.4, 0.6, 0.8) were prepared on substrates (Pt(111)/Ti/SiO2/Si(100)) by the spin-coating method. The results indicate that the films of Bi4−xEuxTi3O12 annealed at 700 °C consist of Bi4Ti3O12 and Pt from the substrates. This indicates that Eu3+ has dissolved into the lattice of Bi4Ti3O12. The doping of Eu3+ to the films of Bi4Ti3O12 enhances ferroelectric properties as well as photoluminescent properties. The films of Bi4−xEuxTi3O12 show two orange emission perks at 590 nm and 595 nm, and a red emission at 613 nm. These three peaks are ascribed to 5D0 → 7F0, 5D0 → 7F1, and 5D0 → 7F2, respectively. The bandgaps of the films of Bi4−xEuxTi3O12 range from 3.07 eV to 2.86 eV with the increase of the doping concentration of Eu3+. Bi3.4Eu0.6Ti3O12 film possesses maximal remanent polarization, minimal leakage current density, and greatest emission intensity.

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Acknowledgements

We acknowledge the support from National Natural Science Foundation of China (51272060).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230069, China

    Li Guo, Min Shi, Jian Fu, Yudong Xu, Ruzhong Zuo, Zheng Zhao, Zhuolin Si, Kunzhuang Hu & Enyang Men

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  1. Li Guo
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  3. Jian Fu
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Correspondence to Min Shi.

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Guo, L., Shi, M., Fu, J. et al. Ferroelectric and photoluminescent properties of Eu3+-doped Bi4Ti3O12 films prepared via the spin-coating method. J Mater Sci: Mater Electron 31, 6339–6348 (2020). https://doi.org/10.1007/s10854-020-03190-4

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