Liu Xiaoqing, Lv Li, Huang Shushu, Su Yiguo, Wang Xiaojing
J Nanosci Nanotechnol. 2014 May;14(5):3618-22. doi: 10.1166/jnn.2014.7992.
Cd(1-x)Eu(x)MoO4 nanoparticles were prepared by a microwave-assisted method. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence (PL) spectra were used to characterize the structures, morphologies and the luminescent properties of as-prepared products. Emission and excitation spectra showed that the phosphor exhibits a dominant red emission at 612 nm with excitation wavelength of 330 nm at room temperature. The optimized concentration of Eu3+ is 5 mol.% for the highest emission intensity at 612 nm. The concentration quenching mechanism can be interpreted by the nearest-neighbor ions interaction of Eu3+ ions. It is found that Eu3+ concentration has great impact on the luminescent intensity which is attributed to the variation of the local symmetry. The red emission is visible to naked eyes, indicating that CdMoO4 may act as a promising host material for Eu3+ doped red phosphors.
采用微波辅助法制备了Cd(1-x)Eu(x)MoO4纳米粒子。利用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和光致发光（PL）光谱对所制备产物的结构、形貌和发光性能进行了表征。发射光谱和激发光谱表明，该荧光粉在室温下激发波长为330 nm时，在612 nm处呈现出占主导地位的红色发射。对于612 nm处的最高发射强度，Eu3+的最佳浓度为5 mol.%。浓度猝灭机制可以用Eu3+离子的近邻离子相互作用来解释。发现Eu3+浓度对发光强度有很大影响，这归因于局部对称性的变化。红色发射肉眼可见，表明CdMoO4可能是一种有前途的Eu3+掺杂红色荧光粉的基质材料。
