Luminescent materials with LED applications can have your emission color controlled by rare earth doping. In this work, Sm³⁺- and Tb³⁺-codoped CaWO₄ nanoparticles were obtained by a one-step sonochemical method. The nanoparticles were characterized by X-ray diffractogram (XRD), Raman scattering (RS) spectroscopy, The Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and visible ultraviolet spectroscopy (UV–Vis). The photoluminescent measurements were taken at room and lower temperatures for analysis of doping in emission color. The diffractograms indicate the single-phase CaWO₄ with the scheelite structure and it was observed a reduction in the crystallite size as the doping. SEM and TEM images indicate the formation of nanospheres for pure and samarium-doped samples, while terbium doping results in the formation of nanorods. Room temperature photoluminescence spectra indicate a blue emission for the bare and samarium-doped CaWO₄, while terbium doping emits at the green color. The codoping mixes the colors blue, green, and orange, indicating a potential material with white color emission.

具有LED应用的发光材料可以通过稀土掺杂来控制您的发射颜色。在这项工作中，通过一步声化学方法获得了Sm ³⁺和Tb ³⁺掺杂的CaWO ₄纳米颗粒。纳米粒子的特征在于X射线衍射图（XRD），拉曼散射（RS）光谱，傅立叶变换红外（FTIR）光谱，扫描电子显微镜（SEM），透射电子显微镜（TEM）和可见紫外光谱（UV–可见）。在室温和较低温度下进行光致发光测量，以分析发射颜色中的掺杂。衍射图表明单相CaWO ₄具有白钨矿结构，并且观察到作为掺杂的微晶尺寸减小。SEM和TEM图像表明纯样品和掺sa样品形成了纳米球，而ter掺杂导致了纳米棒的形成。室温光致发光光谱表明，裸露的和掺sa的CaWO ₄发出蓝色光，而ter掺杂的发出绿色光。共掺杂混合了蓝色，绿色和橙色，表示发出白色光的潜在材料。