Green-emitting, apatite structure of Ca_4-yLa₆(AlO₄)_x(SiO₄)_6-xO_1-x/2: yEu²⁺ was synthesized by using the high-temperature solid-state method under reducing atmosphere (90%N₂–10%H₂). Corresponding to the Eu²⁺ of 4f⁶5 d¹→4f⁷ transition at the excitation wavelength of 335 nm, a broadband emission of 450–700 nm showed. Eu²⁺ lattice selection in Ca_4-yLa₆(AlO₄)_x(SiO₄)_6-xO_1-x/2: yEu²⁺ phosphor were discussed conjunction with apatite crystal structure characteristics. The design of (AlO₄)^5-/(SiO₄)^4- various ratios and Eu²⁺ doping concentration improved the Eu²⁺ luminous intensity and the red-shift of optical emission spectra. Energy transfer between the two luminescent centers of Eu(I) and Eu (II) happened, and clearly distinguished by photoluminescence decay curves monitored at 480 nm and 560 nm with the average-lifetime (τ) of Eu(I) are 240.5 ns, Eu (II) are 405.3 ns, respectively. The temperature-dependent emissions along with blue-shift phenomenon were addressed through the transition process of energy level. Eu(I) and Eu(II) lattice sites.

在还原条件下，采用高温固态法合成了Ca _4-y La ₆（AlO ₄）_x（SiO ₄）_{6- x} O _{1- x / 2}：y Eu ^2+的磷灰石绿光结构。气氛（90％N ₂ –10％H ₂）。对应于335 nm激发波长下4f ⁶ 5 d ¹ →4f ⁷的Eu ²⁺跃迁，显示了450-700 nm的宽带发射。Ca _4-y La _6中的Eu ²⁺晶格选择结合磷灰石晶体结构特征，对（AlO ₄）_x（SiO ₄）_{6- x} O _{1- x / 2}：y Eu ²⁺荧光粉进行了讨论。（AlO ₄）^5- /（SiO ₄）^4-各种比例和Eu ²⁺掺杂浓度的设计提高了Eu ²⁺发光强度和发射光谱的红移。在Eu（I）和Eu（II）的两个发光中心之间发生了能量转移，并通过在480 nm和560 nm处监测的Eu（I）的平均寿命（τ）为240.5 ns的光致发光衰减曲线清楚地区分， Eu（II）分别为405.3 ns。通过能级过渡过程解决了随温度变化的发射以及蓝移现象。Eu（I）和Eu（II）晶格位点。