Abstract
Efficiently red-emitting Pr3+-doped LnNbO4 (Ln = La, Gd, and Y) phosphors have been successfully prepared by the traditional high-temperature solid-state method. Those phosphors were characterized by X-ray diffraction patterns, photoluminescence spectra, diffuse reflectance spectra, temperature-dependent luminescence spectra, and decay properties in detail. Among those LnNbO4 (Ln = La, Gd and Y) hosts, Pr3+-doped LaNbO4 was found to be the most suitable ones because of the relatively high luminescent efficiency and quenching concentration. The optimum doping concentration and critical energy transfer distance of Pr3+ ions in LnNbO4 (Ln = La, Gd, and Y) were determined. The good thermal stability of Pr3+-doped LaNbO4 was also illustrated by temperature-dependent spectra. These merits demonstrated that Pr3+-doped LnNbO4 (Ln = La, Gd and Y) could be a potential candidate as a red-emitting component in phosphor-converted warm LED.
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This work has been supported by the Fujian Provincial Natural Science Foundation of China (Grant No. 2020J01297), and the Science Technology innovation project of Xiamen (Grant No. 3502Z20193056).
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Xiong, F.B., Luo, X., Yang, W.B. et al. Photoluminescence and thermal properties of a red-emitting LnNbO4:Pr3+ (Ln = La, Gd, and Y) phosphor for warm WLEDs. J Mater Sci: Mater Electron 33, 2619–2630 (2022). https://doi.org/10.1007/s10854-021-07467-0
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DOI: https://doi.org/10.1007/s10854-021-07467-0