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Hydrothermal Synthesis of LuF3: RE3+ Phosphors with Tunable Morphology and Multicolor Luminescence
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DOI：10.1142/S1793292026500864.png)
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Abstract
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A series of emission-tunable LuF3:RE3+ (RE =Dy, Tb, Eu, Tm) phosphors were first synthesized via a glutamic acid-assisted one-step hydrothermal process. X-ray diffraction and SEM characterizations confirmed that the products consisted of pure LuF3, pure NaLuF4, or their mixed phases, with morphologies (irregular particles, hexagonal prismatic tubes, microspheres, fusiform structures, leaf-like architectures, etc.) precisely tunable by adjusting the initial reaction pH (2.25-11.16) or the molar ratios of RE3+/NaF (1:1-1:11) and RE3+/NaBF4 (1:1-1:11). The luminescent properties of Dy3+/Tb3+, Tb3+/Eu3+, Dy3+/Eu3+ and Tm3+/Dy3+ co-doped systems revealed characteristic emissions: Dy3+ (482nm, 575nm), Tb3+ (545nm), Eu3+ (590nm, 616nm) and Tm3+ (454nm). Tunable multicolor luminescence (blue, green, light yellow, white) was achieved by varying the excitation wavelength (317-394nm) or dopant concentrations, as verified by CIE chromaticity coordinates ranging from (0.1881, 0.1933) to (0.3988, 0.3759). The facile synthesis route, controllable structure and excellent luminescent performance make these LuF3:RE3+ phosphors promising single-component materials for advanced optoelectronic applications such as displays and solid-state lighting.
Keywords:
LuF3
morphology
multicolor luminescence
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