ABSTRACT

Innovative temperature measurements based on contactless luminescence thermometry require materials that exhibit a significant change of the luminescence parameters in set temperature range. PbMoO₄ and PbMoO₄ doped with copper ions single crystals with optically good quality are grown using low-thermal-gradient Czochralski technique. PbMoO₄ and PbMoO₄:Cu²⁺ samples reveal intense photoluminescence band in the green spectral region. Investigations of the temperature-induced changes in the luminescence of molybdates PbMoO₄ and PbMoO₄:Cu²⁺over the 77–300 K temperature range are summarised and demonstrated. Comparative studies of decay kinetics, emission and excitation spectra allowed assessing the prospects of PbMoO₄ and PbMoO₄:Cu²⁺ crystals as materials for luminescence thermometry. An impurity composition was studied in the grown crystals PbMoO₄:Cu²⁺ by the EPR and the structural position of impurity copper ion was established.

摘要

基于非接触式发光测温的创新温度测量要求材料在设定温度范围内显示出显着的发光参数变化。PbMoO ₄和掺杂有铜离子的PbMoO ₄具有良好的光学质量是使用低热梯度直拉技术生长的。PbMoO ₄和PbMoO ₄ :Cu ²⁺样品在绿色光谱区显示出强烈的光致发光带。钼酸盐 PbMoO ₄和 PbMoO ₄ :Cu ²⁺的温度引起的发光变化研究在 77-300 K 温度范围内进行了总结和演示。衰变动力学、发射和激发光谱的比较研究允许评估 PbMoO ₄和 PbMoO ₄ :Cu ²⁺晶体作为发光测温材料的前景。通过EPR研究了生长晶体PbMoO ₄ :Cu ^{2+ 中}的杂质组成，并确定了杂质铜离子的结构位置。