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

机译:通过化学分析将掺杂铕掺杂成升温物的回收率和均匀性

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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 Eu _( x ) Sr _(1? x ) H _(2) and applied to brightly emitting hydridic perovskites LiMH _(3) :Eu ~(2+) and LiMD _(3) :Eu ~(2+) (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 LiEu _( x ) Sr _(1? x ) H _(3) with x = 0.0037% show a broad band emission at room temperature typical for Eu ~(2+) 4f ~(6) 5d ~(1) –4f ~(7) transitions. Below 80 K, a vibronic fine structure is observed with vibrational coupling frequencies of approximately 100, 370 and 970 cm ~(?1) .
机译:在调查浓度依赖性特性期间,磷光体如排放强度,活化剂离子浓度的知识具有重要意义。在此,我们通过在掺杂铕金属氢化物中的化学分析来展示活化剂离子浓度的回收率和均匀性。在模型系统Eu _(x)sr _(1≤x)h _(2)上建立了分析方法,并施加到亮液氢钙菌LimH _(3):Eu〜(2+)和Limd _(3 ):Eu〜(2+)(m = sr,ba)。从初始重量计算的标称活化剂离子浓度与通过ICP-MS测定的那些氢化物(氘代)和亲本合金而确定的那些。因此,合成方案允许可靠方法可重复掺杂铕成金属氢化物。 Lieu _(x)sr _(1≤x)h _(3)的发光光谱x = 0.0037%在室温下为eu〜(2+)4f〜(6)5d〜(1 )-4f〜(7)过渡。低于80 k,观察到振动耦合频率约为100,370和970cm〜(?1)的振动细结构。

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