On the reasons for low luminescence efficiency in combustion-made Lu2O3:Tb
On the reasons for low luminescence efficiency in combustion-made Lu2O3:Tb
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DOI：
10.1016/s0925-3467(01)00009-x
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发表时间：
2001-05
影响因子：
3.9
通讯作者：
E. Zych
中科院分区：
文献类型：
--
作者：
E. Zych
通过燃烧法制备纳米晶Tb掺杂Lu2O3。通过制造后热处理可以显着提高其低发光效率。红外光谱表明，这种行为（典型的燃烧制造磷光体）的主要原因是制成的材料中存在 OH 振动。只有将材料加热到至少 1500°C 才能完全去除造成这些振动的 OH 基团。对合成程序进行简单的改变以确保燃烧步骤之前水的蒸发，导致 OH 振动强度降低，这反映在所得粉末的发射效率显着增加。
Nanocrystalline Tb-doped Lu2O3was prepared via a combustion route. Its low luminescence efficiency could be dramatically increased through post-fabrication heat-treatment. Infrared spectra showed that the main reason for such a behavior, typical of combustion-made phosphors, was the presence of OH-vibrations in the as-made material. The OH-groups responsible for these vibrations could be completely removed only by heating the materials to at least 1500°C. A simple alteration of the synthesis procedure to assure evaporation of water before the combustion step led to a decrease in the OH-vibration intensities, mirrored by a noticeable increase in the emission efficiency of the resultant powder.