【摘要】 利用高温固相法合成了Ca_9.15La_0.9（PO₄）₇∶0.05Eu²⁺,yMn²⁺和Ca_9.3La_0.8（PO₄）₇∶0.05Eu²⁺,yMn²⁺系列荧光粉。通过荧光粉的发射光谱和荧光衰减曲线证实Eu²⁺、Mn²⁺之间存在能量传递，且增大Mn²⁺的掺杂浓度，获得了从青光（绿光）到白光变化的荧光粉。材料的热稳定性显示Eu²⁺的两个不同颜色的发射峰表现出不同的温度猝灭行为。Ca_9.15La_0.9（PO₄）₇∶0.05Eu²⁺,0.35Mn²⁺的色坐标接近标准白光且色温与太阳光相近，光谱覆盖整个可见光区域。研究结果表明，材料在白光发光二极管方面有潜在的应用价值。更多还原

【Abstract】 A series of Ca_9.15La_0.9（PO₄）₇∶0.05Eu²⁺,yMn²⁺and Ca_9.3La_0.8（PO₄）₇∶0.05Eu²⁺,yMn²⁺were synthesized by the high temperature solid-state method.The energy transfer from Eu²⁺ to Mn²⁺ was confirmed by the emission spectra and fluorescence decay curves.With increasing the concentration of Mn²⁺,the phosphor can produce the tuning emission from blue or green to white light.In addition,the thermal stability of the samples revealed that the two emission peaks of Eu²⁺ with different colors exhibited different temperature quenching behaviors.The color coordinates of Ca_9.15La_0.9（PO₄）₇∶0.05Eu²⁺,0.35Mn²⁺ are close to standard white light and the color temperature is similar to sunlight,which proves its potential application in white light emitting diodes （LEDs）.更多还原