Abstract
α-Ba2ScAlO5 is considered the high-temperature counterpart of the room temperature β-Ba2ScAlO5 phase, which undergoes a phase transition at around 1700 °C. This study demonstrates that α-Ba2ScAlO5 can be synthesized using a traditional high-temperature solid-state approach that is highly stable at room temperature. The single-phase α-Ba2ScAlO5 was successfully obtained by adding excessive BaO and varying the ratio of Sc/Al in barium scandium aluminate. Furthermore, the up-conversion luminescence properties of the rare earth metals doped α-Ba2ScAlO5 was also investigated. The co-doped α-Ba2ScAlO5 with Yb3+ and Er3+ maintained a single-phase structure. The material exhibits good up-conversion fluorescence properties and emits a strong red light at 667 nm when excited by a 980 nm laser, which indicates a broad application prospect in the field of biomedical science.
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