红色荧光粉MMoO4:Eu3+ (M=Ca,Sr,Ba)的水热合成及光谱性质

采用水热合成法制备了红色荧光粉MMoO4:Eu3+ (M=Ca,Sr,Ba),用XRD、SEM、荧光激发和发射光谱对其物相、形貌以及发光性能进行表征和研究.结果表明,在800℃时可得到MMoO4(M=Ca,Sr,Ba)物相结构,荧光粉粒径小且粒度分布均匀.分别以395 nm的近紫外光和465 nm的蓝光激发样品,MMo...

Hydrothermal Synthesis and Spectral Properties of MMoO4∶Eu3+（M=Ca,Sr,Ba） Red Phosphors

The red phosphors MMoO₄ ∶ Eu³⁺(M=Ca,Sr,Ba) were prepared by hydrothermal synthesis method. The crystalline phase, morphology and luminescence characteristics of the phosphor particles were characterized by X-ray diffraction (XRD), scanning electron microscopy(SEM),excitation and emission spectra. The results show that the phosphors prepared at 800 ℃ temperature are with MMoO₄ (M=Ca,Sr,Ba) crystalline phase, the phosphors have small particle size and uniform particle size distribution. Upon excitation with 395 nm and 465 nm light, all the MMoO₄ ∶ Eu³⁺(M=Ca, Sr, Ba) phosphors show bright red emission due to the 4f-4f transitions of Eu³⁺ ions, and the highest photoluminescence intensity at 616 nm is found. The excitation and emission spectra show that this phosphor could be effectively excited by ultraviolet(395 nm) and blue light(465 nm), nicely fitting with the emission wavelengths of widely applied ultraviolet or blue LED chips.