Abstract
AbstractThe luminescent‐ferroelectic materials based on Sr1.90Ca0.15Na0.9Nb5O15 (SCNN) matrix doping with Eu3+ were synthesized by the conventional solid‐state reaction method. The crystal structure, photoluminescence, thermal stability, dielectric, ferroelectric, and piezoelectric behaviors were systematically investigated. XRD results revealed that Eu3+ introduction could induce the tungsten bronze phase transition from orthorhombic to tetragonal structures. The dielectric spectra of all specimens showed two broad dielectric anomalies: a high‐temperature ferroelectric phase transition (Tc) and a low‐temperature ferroelastic phase transition (Ts), both of which were suppressed at higher Eu3+ concentrations. The enhanced electrical properties were obtained in a proper Eu3+ concentration range of 0.03‐0.05. For all SCNN:xEu3+ samples, the strong red emission peak at 617 nm originating from the electric dipole transition of 5D0 →7F2 was excited by different light excitations of 395 or 463 nm. Our results demonstrated that Eu3+‐doped SCNN materials might have promising potential in advanced multifunctional optoelectronic applications.
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