共沉淀法制备LuGG∶Ce纳米荧光粉及其发光性能研究

采用共沉淀法合成了Ce³⁺掺杂的Lu₃Ga₅O₁₂(LuGG∶Ce)纳米荧光粉,采用Rietveld结构精修的方法确定了其结构参数。用扫描电子显微镜(SEM)测定了所合成纳米荧光粉的形貌。在365 nm激发光激发下,观测到的发射光谱呈非对称宽带,中心波长为438 nm。通过高斯拟合得到该发射谱带包含中心波长分别为426 nm和470 nm的两个发射峰。LuGG∶Ce的发光色度坐标为(0.176 9, 0.180 3),对应为蓝光发射。结果表明,LuGG∶Ce适用于通过紫外光(UV)激发实现蓝光发射,在紫外光(UV)激发白光LED领域具有潜在的应用前景。

Luminescent Properties of LuGG∶Ce Nanophosphor Synthesized via Co-Precipitation Method

Ce³⁺ doped Lu₃Ga₅O₁₂ (LuGG∶Ce) nanophosphor was synthesized via co-precipitation method. Its structured parameters were obtained by Rietveld refinement method. The morphology of the as-synthesized nanophosphor was determined with Scanning Electron Microscope (SEM). Under 365 nm excitation, the emission spectrum exhibits an asymmetry broad band with central wavelength at 438 nm and this broad band can be deconvolved into two peaks with wavelength centers at around 426 nm and 470 nm, respectively. The chromaticity coordinate of LuGG∶Ce is (0.176 9, 0.180 3), which corresponds to blue light emission. The results show LuGG∶Ce is suitable for realizing blue light emission under UV excitation and thus has potential applications in the fields of UV-excited white light emitting diodes(LEDs).