Ho3+/Yb3+共掺ZnO-Al2O3-GeO2-SiO2玻璃陶瓷的制备和上转换发光性质

综合ZnO-Al_2O_3-SiO_2系和锗酸盐玻璃陶瓷的优点,采用熔融-晶化法首次制备了Ho~(3+)/Yb~(3+)共掺以ZnAl_2O_4为主晶相的ZnO-Al_2O_3-GeO_2-SiO_2系玻璃陶瓷。因GeO_4]四面体和SiO_4]四面体都是玻璃网络形成体,讨论了GeO_2取代SiO_2对玻璃陶瓷样品硬度及发光性能的影响,最终确定GeO_2的取代量为10.55%(w/w)时,玻璃陶瓷综合性能最佳。在980 nm泵浦光的激发下,发现强的绿色(546 nm)和弱的红色(650 nm)上转换发光,并研究了不同Ho~(3+)/Yb~(3+)掺杂比对样品上转换发光的影响,最终结果表明当Ho~(3+)/Yb~(3+)掺杂比为1∶11(n/n)时样品荧光强度最强,在绿色上转换发光材料方面具有潜在的应用。

Preparation and Up-Conversion Luminescence Properties of Ho3+/Yb3+ Co-doped ZnO-Al2O3-GeO2-SiO2 Glass Ceramics

Combining the advantages of ZnO-Al₂O₃-SiO₂ system and germinate glass ceramics, Ho³⁺/Yb³⁺ co-doped ZnO-Al₂O₃-GeO₂-SiO₂ glass ceramics containing ZnAl₂O₄ crystalline phase were successfully prepared by melt-crystallization technique for the first time. Because the tetrahedralGeO₄] and tetrahedralSiO₄] are glass network skeleton, Subsequently, the influence of GeO₂ instead of SiO₂ on the hardness and up-conversion luminescence properties of glass ceramic samples is discussed here. Ultimately, when the quantity of GeO₂ instead of SiO₂ was 10.55%(w/w), comprehensive performance of the glass ceramic samples were optimum. Under the 980 nm pump light excitation, a strong green emission (546 nm) and a weak red emission (650 nm) are observed. The effect of different doped ratios of Ho³⁺/Yb³⁺ on the up-conversion luminescence of samples was studied. The experimental results indicated that the luminescence intensity reaches a maximum when the doped ratios of Ho³⁺:Yb³⁺ is 1:11 and the samples have potential application on green up-conversion luminescence material.