Recovery rate and homogeneity of doping europium into luminescent metal hydrides by chemical analysis

Recovery rate and homogeneity of doping europium into luminescent metal hydrides by chemical analysis
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化学分析将铕掺杂到发光金属氢化物中的回收率和均匀性

DOI:
10.1039/c4ra14076a
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发表时间:
2015
期刊:
影响因子:
3.9
通讯作者:
H. Kohlmann
H. Kohlmann
中科院分区:
化学3区
文献类型:
--
作者:
R. Hahn;N. Kunkel;C. Hein;R. Kautenburger;H. Kohlmann

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在研究荧光粉的浓度依赖特性(如发射强度)时,活化离子浓度的知识是非常重要的。本文通过化学分析研究了发光铕掺杂金属氢化物中活化离子浓度的回收率和均匀性。在模型体系EuxSr1−xH2上建立了分析方法,并应用于发光的水合钙钛矿LiMH3:Eu2+和LiMD3:Eu2+ (M = Sr, Ba)。从初始质量计算的标称活化离子浓度与ICP-MS测定的结果一致,氢化物(氘化物)和母合金的活化离子浓度均为10−3%≤x。因此,该合成方案提供了一种可重复地将铕掺杂到金属氢化物中的可靠方法。当x = 0.0037%时,LiEuxSr1−xH3的发光光谱在室温下显示出Eu2+ 4f65d1-4f7相变的典型宽带发射。在80 K以下,观察到振动精细结构,振动耦合频率约为100、370和970 cm−1。
During the investigation of concentration dependent properties of phosphors, such as emission intensities, the knowledge of the activator ion concentration is of great importance. Herein we present a study on recovery rate and homogeneity of the activator ion concentration by chemical analysis in luminescent europium doped metal hydrides. The analysis method was established on the model system EuxSr1−xH2 and applied to brightly emitting hydridic perovskites LiMH3:Eu2+ and LiMD3:Eu2+ (M = Sr, Ba). The nominal activator ion concentrations calculated from initial weights are in good agreement with those determined via ICP-MS for 10−3% ≤ x both for the hydrides (deuterides) and the parent alloys. The synthesis protocol thus allows a reliable method for reproducibly doping europium into metal hydrides. Luminescence spectra of LiEuxSr1−xH3 with x = 0.0037% show a broad band emission at room temperature typical for Eu2+ 4f65d1–4f7 transitions. Below 80 K, a vibronic fine structure is observed with vibrational coupling frequencies of approximately 100, 370 and 970 cm−1.
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影响因子: 4.6
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