Ferroelectric (Na1/2Bi1/2)TiO3 thin films showing photoluminescence properties |
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| Authors: | M Zannen M Dietze H Khemakhem M Es-Souni |
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| Institution: | 1. Laboratory of Ferroelectric Materials, Faculty of Sciences of Sfax, University of Sfax, BP 802, 3018, Sfax, Tunisia
2. Institute of Materials and Surface Technology, University of Applied Science Kiel, Grenzstr. 3, 24149, Kiel, Germany
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| Abstract: | Polycrystalline lead-free (Na1/2Bi1/2)TiO3 (NBT) ferroelectric thin films doped with 1 mol% of rare earth (RE) elements are processed on Pt-terminated silicon substrates using a solution deposition method. The thin films that exhibit single-phase perovskite structure show photoluminescence properties with highest intensities in the wavelength range between 700 and 850 nm, depending on RE element. The ferroelectric properties of the pure NBT film (P r: 20.5 µC cm?2, E c: 150 kV cm?1) are somewhat decreased for the doped films, which is ascribed to decreasing of the number of Bi lone pairs through the substitution of Bi with RE elements in the perovskite lattice. |
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