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采用共沉淀法制备了不同Eu3+掺杂浓度的Gd2(WO4)3纳米发光材料.测量了纳米材料样品的X射线衍射谱(XRD)和场发射扫描电镜,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和激发光谱(声子边带光谱),绘制了浓度猝灭曲线,确定了最佳的掺杂浓度为20mol%.通过声子边带光谱计算了不同掺杂浓度样品的黄昆因子.测量了不同浓度样品的荧光寿命,利用Auzel模型对Eu3+5D0能级荧光寿命数据进行了拟合,确定了5D0能级的固有寿命和猝灭过程中生成的声子数.本文还根据荧光寿命数据计算了Eu3+之间的能量传递速率,确定了能量传递速率与浓度的关系.
Gd2 (WO4) 3 nano-luminescent materials with different Eu3 + doping concentrations were prepared by co-precipitation method.The structures and morphologies of the samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy The emission spectra and excitation spectra (phonon sideband spectra) of each sample were measured and the quenching curve was plotted to determine the best doping concentration of 20mol% .Based on the phonon sideband spectra, different doping concentrations The fluorescence lifetime of samples with different concentrations was measured, and the fluorescence lifetime of Eu3 + 5D0 was fitted by Auzel model to determine the intrinsic lifetime of 5D0 energy level and the number of phonons generated during quenching The energy transfer rate between Eu3 + and the energy transfer rate was also calculated based on the fluorescence lifetime data.