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采用中频感应提拉法生长了掺1.0%(摩尔分数)Ce3+的钒酸钇(Ce3+∶YVO4)晶体。用分光光度计测量了激发光谱和发射光谱,分析了Ce3+离子的发光机制,计算了5d能级红移量D(A)=24 290cm-1和光谱极化率αsp=8.58(10-30 m3)。结果表明:激发光谱中发现Ce3+离子从4f-5d的特征吸收,两个激发吸收带分别位于蓝紫光区(341~403nm)和紫外光区(225~240nm);发射光谱中在400~600nm区域有较强的5d-4f发射,其FWHM大约是80nm,发射光谱具有不对称的双峰结构,经Gauss拟合,得到发射峰的双峰的中心波长分别为424nm和469nm。该晶体可成为一种潜在的可见光区调谐激光或高温闪烁晶体材料。
Yttrium vanadate (Ce3 +: YVO4) crystals doped with Ce3 + at 1.0% (mole fraction) were grown by IF induction pulling. The excitation and emission spectra were measured by spectrophotometer. The emission mechanism of Ce3 + ions was analyzed. The red shift amount of 5d (2490cm-1) and the spectral polarizability αsp = 8.58 (10-30m3) ). The results show that the characteristic absorption of Ce3 + ions from 4f-5d is found in the excitation spectrum. The two excitation absorption bands are located in the blue-violet region (341 ~ 403nm) and the ultraviolet region (225 ~ 240nm) There is a strong 5d-4f emission, the FWHM is about 80nm, the emission spectrum has an asymmetric bimodal structure, and the center wavelength of the bimodal peak obtained by Gauss fitting is 424nm and 469nm, respectively. The crystal can become a potential tunable laser in the visible region or a high-temperature scintillation crystal material.