Er^(3+)浓度对Er^(3+)/Yb^(3+)共掺氟氧化物玻璃陶瓷上下转换发光的调控(英文)

Modulation of Up-and Down-conversion Emissions by Er^(3+) Concentration in Er^(3+)/Yb^(3+) Co-doped Oxyfluoride Glass Ceramics

在980nm激光激发下,Er3+/Yb3+共掺的发光材料既可以在可见光范围产生上转换发光,也可以在近红外波段产生下转换发光,二者存在竞争关系。本文利用熔融淬火法制备了一系列掺杂不同Er3+/Yb3+浓度的氟氧化物玻璃陶瓷,测量了样品在980 nm激光激发下的上转换及下转换发射光谱。研究发现,改变Er3+的掺杂浓度可以调控上下转换的发光强度。在此基础上,提出了上下转换发光的能量传递模型。本文的研究结果有利于该类材料在不同领域中的应用。

Oxyfluoride glass ceramics with different Er3+/Yb3+ concentration were prepared by the melt-quenching method. The up- and down-conversion emissions were measured under 980 nm laser excitation. It is found that the intensities of up- and down-conversion emissions can be adjusted by changing the Er3+ doping concentration. The energy transfer model of up- and down-conversion emission is proposed, which clarifies the previous disagreements about up- and down-conversion energy transfer processes. The results will be used in controlling luminescent processes at different application fields.