Strong red emission and enhanced electrical properties in Pr-doped SrBi4Ti4O15 multifunctional ceramics
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Pr3+-modified SrBi4Ti4O15 ceramics were prepared using a conventional solid-state reaction method. The modified ceramics simultaneously exhibited both visible photoluminescence and enhanced electrical properties. In visible light, ceramics exhibited a strong red emission peak at 610 nm corresponding to the inter-4f transition 1D2 → 3H4 due to the absence of inversion symmetry at Pr3+ sites. This red luminescence is greatly potential in various display devices. Meanwhile, samples modified by Pr3+ in x = 0.002 showed a large piezoelectric constant of 20pC/N and a remnant polarization of 22.78 μC/cm2, as well as a high Curie temperature value of 511 °C and excellent piezoelectric temperature stability. Moreover, the Pr3+-modified SrBi4Ti4O15 ceramics show a fatigue-free polarization behavior. All these advantages may expand the application fields of the materials as multifunctional devices by integrating their luminescent and piezoelectric properties.
This work was supported by the National Key R&D Program of China (No. 2016YFB0402701), Focus on Research and Development Plan in Shandong Province (No. 2017GGX202008), the Project of Shandong Province Higher Educational Science and Technology Program (Nos. J17KA005), National Natural Science Foundation of China (Nos. 51701091, 51802137, 21603092), the Natural Science Foundation of Shandong Province of China (ZR2016EMM02, ZR2017PB003, ZR2018PEM009).
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