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采用溶胶–凝胶法分别制备了掺不同摩尔分数Er3+的Er3+:Al2O3粉末和不同摩尔分数Y3+的0.5%Er3+:Al2O3(Y3+:0.5%Er3+:Al2O3)粉末。利用Y3+与Al3+的半径差异,通过共掺不同掺量的Y3+来调制Al2O3的微结构,用X射线衍射和透射电子显微镜分析样品的结构特征,并通过光致发光光谱研究样品的光致发光特性。结果表明:不同Y3+和Er3+共掺杂的Y3+:Er3+:Al2O3样品均以-Al2O3为主相;随着Y3+掺量的增加,Al2O3的晶格缺陷逐渐增多;样品的荧光强度、发射谱宽度及荧光寿命也都随着Y3+掺量增大而增大。通过Y3+掺量调制Er3+所处微结构环境的方法有效地改善了Er3+:Al2O3材料的发光特性。
Er3 +: Al2O3 powders with different molar fractions of Er3 + and 0.5% Er3 +: Al2O3 (Y3 +: 0.5% Er3 +: Al2O3) powders with different molar fractions of Y3 + were prepared by sol- The microstructure of Al2O3 was prepared by co-doping Y3 + with different dosages by using the difference of the radius of Y3 + and Al3 +. The structure of the samples was characterized by X-ray diffraction and transmission electron microscopy. The photoluminescence . The results show that the main phase of Y3 +: Er3 +: Al2O3 doped with different Y3 + and Er3 + are mainly Al2 O3. With the increase of Y3 + content, the lattice defects of Al2O3 gradually increase. The fluorescence intensity, emission spectrum width and Fluorescence life also increases with the increase of Y3 + content. The luminescence properties of Er3 +: Al2O3 material are effectively improved by adjusting the microstructure environment where Er3 + is doped by Y3 +.