白光LED用磷酸盐红色荧光粉的研究

Study on Phosphates Red Phosphates Used in White LED

稀土掺杂磷酸盐发光材料是一种新型的发光材料,具有良好的化学稳定性,效率高,成本低,实验条件简单等优点。采用高温固相法在1100℃制备了Ca_(2.7-x)Na_x(PO_4)_2:0.3Eu^(3+)红色荧光粉,通过X射线衍射分析和荧光光谱分析方法,研究荧光粉的发光特性。为了进一步提高其发光强度,在荧光粉中引入了电荷补偿剂Na^+,通过研究Na^+浓度对荧光粉发光性质的影响,发现电荷补偿后荧光粉的发射强度是补偿前发射强度的2.8倍左右,得到荧光粉最佳化学组成为Ca_(2.67)Na_(0.03)(PO_4)_2:0.3Eu^(3+)。

Rare earth doped phosphates luminescent material is a new kind of luminescent material with good chemical stability,high efficiency,low cost and simple experimental conditions.Ca 2.7-x Na x(PO4)2:0.3Eu 3+red phosphors were prepared at high temperature by solid-state reaction at 1100℃.The luminescent properties of phosphors were investigated by X-ray diffraction and fluorescence spectroscopy.In order to further improve its luminous intensity,the charge compensation agent Na+was introduced into the phosphor.By studying the effect of Na+concentration on the luminescent properties of phosphors,it was found that the emission intensity of phosphors after charge compensation was about 2.8 times of that of the pre emission intensity,and the best chemical composition of the phosphor was Ca 2.67 Na 0.03(PO4)2:0.3Eu 3+.