【摘要】 采用水热法合成了一系列CaMo_1-xO₄:xEu³⁺（x=0.001, 0.005, 0.01, 0.015, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10）红色荧光粉。对样品进行了X射线粉末衍射（XRD）、扫描电镜（SEM）及荧光光谱（PL）等表征，探讨了不同实验条件对荧光粉性能的影响。研究结果表明，合成的CaMo_1-xO₄:xEu³⁺样品为四方晶系纯相。在394.6 nm光激发下，样品发射光谱位于592 nm、614 nm、654 nm和701nm处的四个尖峰，分别归属于Eu³⁺的⁵D₀→⁷F₁、⁵D₀→⁷F₂、⁵D₀→⁷F₃和⁵D₀→⁷F₄能级跃迁，614 nm跃迁强度最大，荧光粉发红光。Eu³⁺的最佳掺杂量为0.05,荧光猝灭是由交换相互作用引起的。CaMo_0.95O₄:0.05Eu³⁺样品发光强度随温度升高而下降，当温度升高至453 K时，样品的发光强度是303 K时的54%。通过对ln（I_o/I-1）～1/kT曲线进行拟合得到CaMo_0.95O₄:0.05Eu³⁺荧光粉的激活能为0.262 eV。样品在CIE1931色度图上均落在红光区域，是一种潜在的LED用单掺杂红光发光材料。更多还原

【Abstract】 A series of red phosphors CaMo_1-x O₄:xEu³⁺（x=0.001, 0.005, 0.01, 0.015, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10） were synthesized by hydrothermal method. Techniques such as X-ray powder diffraction（XRD）, scanning electron microscopy（SEM） and photoluminescence（PL） spectra were used to characterized the samples. The effects of different experimental conditions on the luminescent properties were systematically investigated. The results shows that the synthesized CaMo_1-xO₄:xEu³⁺ samples are pristine tetragonal structure. Under 394.6 nm excitation, the emission peaks of samples are at 592 nm, 614 nm, 654 nm and 701nm, which correspond to ⁵D₀→⁷F₁, ⁵D₀→⁷F₂, ⁵D₀→⁷F₃ and ⁵D₀→⁷F₄ transition of Eu³⁺ ions, respectively. The transition intensity reaches its maximum at 614 nm, and the phosphor emits red light. The optimal doping amount of Eu³⁺ ions is 0.05, and fluorescence quenching is caused by exchange interaction. The emission intensity decreased with the increasing of temperature. When the temperature increases to 453 K, the luminescence intensity of the sample is 54% of that at 303 K. And the activation energy of CaMo_0.95O₄: 0.05Eu³⁺ was calculated to be 0.262 eV through fitting the curves of ln（I_o/I-1）～1/kT.The samples are located red region on the CIE 1931 chromaticity diagram, indicating that they potential single-doped red luminescent materials for LEDs.更多还原