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首页> 外文期刊>RSC Advances >Upconversion luminescence of cerium-stabilized high temperature phase zirconia phosphors with a high Er3+ doping concentration
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Upconversion luminescence of cerium-stabilized high temperature phase zirconia phosphors with a high Er3+ doping concentration

机译：Er3 +掺杂浓度高的铈稳定高温相氧化锆荧光粉的上转换发光

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摘要

Oxide upconversion (UC) materials usually have lower luminescence efficiency (LE) due to their low quenching concentration and high phonon energy. To solve this issue, we have investigated in detail cerium-stabilized high temperature phase zirconia based phosphors (Zr(0.85-x)Ce0.15O(2-0.5x):xEr(3+)) with different doping concentrations of Er3+ and have achieved a red phosphor with an Er3+ concentration as high as 10 mol%, which will have broad prospects for its application as a new UC material. The results demonstrate that adjusting the host structure of the UC material can increase its quenching concentration and thereby the LE will be improved. The introduction of Ce4+ into ZrO2 not only stabilizes its phase but also improves the LE of the ZrO2 based UC material. The Er3+ coordination state changes with an increase of Er3+ concentration in the UC phosphors based on cerium-stabilized zirconia. The corresponding luminescence process translates into the cross relaxation from the excited state absorption, UC luminescence changes from green to red and the red emission intensity becomes stronger and stronger and achieves its maximum when the Er3+ concentration is 10 mol%.
机译：氧化物上转换（UC）材料由于其低猝灭浓度和高声子能量而通常具有较低的发光效率（LE）。为了解决这个问题，我们详细研究了铈稳定的高温相氧化锆基荧光粉（Zr（0.85-x）Ce0.15O（2-0.5x）：xEr（3+）），其中掺杂的Er3 +浓度不同。获得了Er3 +浓度高达10 mol％的红色荧光粉，将其用作新型UC材料具有广阔的前景。结果表明，调节UC材料的主体结构可以增加其淬灭浓度，从而改善LE。将Ce4 +引入ZrO2中不仅可以稳定其相，而且可以改善ZrO2基UC材料的LE。基于铈稳定的氧化锆，UC荧光粉中的Er3 +配位态随着Er3 +浓度的增加而变化。相应的发光过程转化为激发态吸收的交叉弛豫，UC发光由绿色变为红色，并且当Er3 +浓度为10 mol％时红色发射强度变得越来越强，并达到最大值。

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