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采用共沉淀法制备了不同Eu3+掺杂浓度的Gd2W2O9和Gd2(WO4)3纳米发光材料.通过对纳米材料样品的X射线衍射谱(XRD)和场发射扫描电镜(FE-SEM)照片的观察和分析,对样品的结构和形貌进行了表征.测量了各样品的发射光谱、激发光谱,计算了各样品的部分J-O参数和Eu3+5D0能级量子效率,绘制了不同基质中Eu3+发光的浓度猝灭曲线,对Eu3+掺杂的Gd2W2O9和Gd2(WO4)3纳米发光材料的光致发光性质进行了研究.实验结果证明,与较常见的Gd2(WO4)3:Eu一样,Gd2W2O9:Eu中Eu3+5D0→7F2跃迁的红色发光也能被395nm和465nm激发光有效激发,具有近紫外(蓝光)相对激发效率高,猝灭浓度大的优点,有潜力成为高效的近紫外(蓝光)激发白光LED用红色荧光粉材料.
Gd2W2O9 and Gd2 (WO4) 3 nano-luminescent materials with different Eu3 + doping concentrations were prepared by coprecipitation method.The X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) The structure and morphology of the samples were characterized.The emission spectra and excitation spectra of each sample were measured.The partial JO parameters of each sample and the quantum efficiency of Eu3 + 5D0 were calculated.The concentration of Eu3 + Quenching curve of the Eu3 + -doped Gd2W2O9 and Gd2 (WO4) 3 nano-luminescent materials were studied.The experimental results show that, like the more common Gd2 (WO4) 3: Eu, Eu3 The +5 D0 → 7 F2 transition red emission can also be effectively excited by the 395 nm and 465 nm excitation light with the advantages of relatively high near-ultraviolet (blue) excitation efficiency and large quenching concentration, and the potential to be an efficient near-ultraviolet (blue) Use red phosphor material.