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以介孔二氧化硅MCM-48为硅源,采用水热处理与固相反应相结合的方法合成Ce3+掺杂的Y2SiO5(Y2SiO5:Ce3+)荧光粉。使用X线衍射、扫描电镜和荧光光谱等测试手段对样品结构、形貌和发光性能进行研究。研究结果表明:煅烧温度为1 200℃时,样品为X1和X2构型的Y2SiO5混合相,1 300℃时样品为X2构型的Y2SiO5单相。煅烧温度升高使激发和发射光谱中峰强度显著增加,发射谱明显红移。将发射宽带高斯拟合成4个峰,分别归属于Y2SiO5基质中2个不同格位(B1和B2)Ce3+的5d→4f(2F5/2和2F7/2)跃迁双峰。
Ce3 + doped Y2SiO5 (Y2SiO5: Ce3 +) phosphor was synthesized by a combination of hydrothermal treatment and solid phase reaction using mesoporous silica MCM-48 as the silicon source. The structure, morphology and luminescence properties of the samples were investigated by X-ray diffraction, scanning electron microscopy and fluorescence spectroscopy. The results show that when the calcination temperature is 1200 ℃, the sample is Y2SiO5 mixed phase with X1 and X2 configurations, and Y2SiO5 single phase with X2 configuration at 1300 ℃. The calcination temperature increases the peak intensity in excitation and emission spectra significantly, and the emission spectrum shifts red markedly. The emission broadband Gaussian is fit into four peaks, which are assigned to the 5d → 4f (2F5 / 2 and 2F7 / 2) transition bimodals of Ce3 + at two different sites (B1 and B2) in Y2SiO5 matrix respectively.