本文采用溶胶 - 凝胶法分别制备了Eu3+和Sm3+掺杂Y2MoO6荧光粉。产物的结构、形貌和发光性质分别通过X射线衍射(XRD)、扫描电子显微镜(SEM)、发射光谱(PL)、激发光谱(PLE)及荧光寿命谱(Lifetime)等进行了表征。XRD证实产物为纯相单斜结构,空间群C2/c,SEM照片显示两种体系尺寸均在亚微米量级。激发光谱显示两种体系均能有效吸收近紫外波段光,并表现出良好的红色、橙红色发光性能。同时,深入研究了其发光机理、浓度淬灭效应及色度坐标。该系列荧光粉将在近紫外激发白光LED中有着潜在的应用价值。

Eu3+,Sm3+ doped Y2MoO6 red and orange phosphors have been prepared by a sol-gel method.The crystals structure,morphologies and optical properties of the samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),photoluminescence emission spectra (PL),excitation spectra (PLE) and decay curves (lifetime) respectively.XRD results imply that the obtained samples are of monoclinic structure with C2/c space group and no extra phases are observed.The sample size of sub-micrometer is shown in SEM images.The samples can absorb near UV light efficiently confirmed by PLE spectra and reveal excellent red and orange emissions.Furthermore,the luminescence mechanism,the effect of concentration quenching and the CIE chromaticity coordinates are discussed in detail.These phosphors will have potential applications in phosphor-converted WLEDs for the excitation of near UV light.