Ansari Esarat J, Patle Shruti, Pusdekar Ashvini R, Ugemuge Nilesh S, Selokar Ashish
Department of Physics, RTM Nagpur University, Nagpur 440033, India.
Department of Applied Physics, Priyadarshini J L College of Engineering, Nagpur 440009, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Oct 15;339:126269. doi: 10.1016/j.saa.2025.126269. Epub 2025 Apr 19.
A series of singly and co-doped KY(WO)(PO):Sm,Tb (KYWP) phosphors were synthesized by solid-state reaction (SSR) route, and its photoluminescence (PL) behavior in visible region have been studied. The compound KY(WO)(PO) formed by combination of tetrahedral anions such as WO and PO are good hosts for phosphor due to their easy-synthesis procedure, low-cost, chemical stability and thermal-stabilities over a wide range of temperatures. X-ray diffraction pattern confirms the orthorhombic crystal system with a space group of Ibca No. (73). SEM, EDS and Elemental mapping confirm the morphology and constituent of elements present in as prepared sample. Under 404 nm excitation, the dominant emission for Sm doped KY(WO)(PO) obtained at 604 nm corresponds to the G → H transition. For Tb ions, emissions obtained at 546 nm attributed to D → F for the excitation of 377 nm. The Sm and Tb co-doped KY(WO)(PO) samples give intense orange-red light when excited at 404 nm, with the optimal concentration of 2 mol% and 5 mol% of Sm and Tb ions respectively. Also, the intense green color is observed at 377 nm excitation for 2 mol% of Sm and Tb ion doping. The color coordinates of prepared samples were also clearly displayed in this work. The results indicate that ET between sensitizer and activator (Tb ↔ Sm) is beneficial to improve the luminescence properties of activator (Sm and Tb). All these results confirm the promising application of as prepared phosphors for light emitting diodes, colour tunable phosphor and other opto-electronic devices.
通过固态反应（SSR）路线合成了一系列单掺杂和共掺杂的KY(WO)(PO):Sm,Tb（KYWP）荧光粉，并研究了其在可见光区域的光致发光（PL）行为。由四面体阴离子如WO和PO组合形成的化合物KY(WO)(PO)由于其合成过程简单、成本低、化学稳定性以及在很宽温度范围内的热稳定性，是荧光粉的良好基质。X射线衍射图谱证实其为正交晶系，空间群为Ibca No.（73）。扫描电子显微镜（SEM）、能谱仪（EDS）和元素映射确定了所制备样品中元素的形态和组成。在404 nm激发下，Sm掺杂的KY(WO)(PO)在604 nm处的主要发射对应于G→H跃迁。对于Tb离子，在377 nm激发下于546 nm处获得的发射归因于D→F跃迁。Sm和Tb共掺杂的KY(WO)(PO)样品在404 nm激发时发出强烈的橙红色光，Sm和Tb离子的最佳浓度分别为2 mol%和5 mol%。此外，对于2 mol%的Sm和Tb离子掺杂，在377 nm激发下观察到强烈的绿色。在这项工作中还清楚地展示了所制备样品的色坐标。结果表明敏化剂和激活剂（Tb↔Sm）之间的能量传递有利于改善激活剂（Sm和Tb）的发光性能。所有这些结果证实了所制备的荧光粉在发光二极管、颜色可调荧光粉和其他光电器件方面具有广阔的应用前景。
