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采用均相沉淀,马弗炉煅烧的方法,合成了一系列Y2O3:Er3+,Yb3+上转换发光材料。该类材料在波长为980nm半导体激光器激发下发射出中心波长为564nm的绿色和662nm的红色上转换荧光,分别对应于Er3+离子的4S3/2/2H11/2→4I15/2和4F9/2→4I15/2跃迁。探讨了不同合成条件对其上转换发光强度和波长的影响,发现沉淀时的pH值,煅烧温度和沉淀中Er3+、Y b3+的相对浓度对其发光有显著影响。
A series of Y2O3: Er3 +, Yb3 + upconverting luminescent materials were synthesized by homogeneous precipitation and muffle calcination. This kind of material emits green with a center wavelength of 564nm and red upconversion fluorescence at 662nm under the excitation of a semiconductor laser with a wavelength of 980nm corresponding to 4S3 / 2 / 2H11 / 2 → 4I15 / 2 and 4F9 / 2 → 4I15 of Er3 + ions respectively / 2 transitions. The effects of different synthesis conditions on their up-conversion luminescence intensity and wavelength were investigated. It was found that the pH, the calcination temperature and the relative concentrations of Er3 + and Yb3 + in the precipitate have a significant effect on the luminescence.