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

摘要

综合ZnO-Al2O3-SiO2系和锗酸盐玻璃陶瓷的优点,采用熔融-晶化法首次制备了Ho3+/Yb3+共掺以ZnAl2O4为主晶相的ZnO-Al2O3-GeO2-SiO2系玻璃陶瓷.因[GeO4]四面体和[SiO4]四面体都是玻璃网络形成体,讨论了GeO2取代SiO2对玻璃陶瓷样品硬度及发光性能的影响,最终确定GeO2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Ho3+/Yb3+掺杂比对样品上转换发光的影响,最终结果表明当Ho3+/Yb3+掺杂比为1∶11 (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.%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 meltcrystallization technique for the first time.Because the tetrahedral [GeO4] and tetrahedral [SiO4] 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 l0.55％(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∶11and the samples have potential application on green up-conversion luminescence material.