研究了不同Er3+/Yb3+掺杂比46Bi2O3-44GeO2-10Na2O(B46G44N10)(摩尔分数)玻璃的吸收光谱、红外吸收谱和上转换光谱性质,分析了玻璃中Yb3+敏化Er3+的上转换发光机制。测试了Er3+离子在不同Yb3+浓度下玻璃中的上转换荧光强度,得到最佳的掺杂质量比Er3+∶Yb3+=1∶6。计算了在980 nm激发下Er2O3质量分数为0.5%和Yb2O3质量分数为3.0%的Er3+/Yb3+共掺B46G44N10玻璃的绿光上转换效率为2.27×10-4。比较了不同基质材料玻璃的上转换效率,结果表明B46G44N10玻璃是一种良好的上转换基质材料。

The absorption spectra, infrared (IR) absorption spectra and upconversion fluorescence spectra of a series of Er3+/Yb3+-codoped 46Bi2O3-44GeO2-10Na2O (B46G44N10) glasses were investigated, and upconversion luminescence mechanisms of Yb3+ sensitize Er3+ were analyzed. Upconversion fluorescence intensities of Yb3+ sensitize Er3+ were measured, the optimal doping ratio of Er3+ and Yb3+ was 1∶6 for this glass, which resulted in the strongest upconversion fluorescence intensities. An upconversion efficiency of 2.27×10-4 was calculated for green emission from the B46G44N10 glass with 0.5 wt.-% Er2O3, and 3.0 wt.-% Yb2O3 pumped by 980 nm. Results indicated that this kind of bismuth glasses might be potential materials for developing upconversion optical devices.