白光LEDs用Ca_(9.15)La_(0.9)(PO_(4))_(7)∶Eu^(2+),Mn^(2+)材料的发光特性及能量传递  

Luminescence Properties and Energy Transfer of Ca_(9.15)La_(0.9)(PO_(4))_(7)∶Eu^(2+),Mn^(2+)for White LEDs

作　　者：王涛 张晓帅 李晓彤 王志军[2] 李盼来[2] WANG Tao;ZHANG Xiaoshuai;LI Xiaotong;WANG Zhijun;LI Panlai(College of Science,China University of Petroleum(East China),Qingdao 266580,China;College of Physics Science&Technology,Hebei University,Baoding 071002,China)

机构地区：[1]中国石油大学(华东)理学院,山东青岛266580 [2]河北大学物理科学与技术学院,河北保定071002

出　　处：《发光学报》2023年第12期2168-2179,共12页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61805285)。

摘　　要：利用高温固相法合成了Ca_(9.15)La_(0.9)(PO_(4))_(7)∶0.05Eu^(2+),yMn^(2+)和Ca_(9.3)La_(0.8)(PO_(4))_(7)∶0.05Eu^(2+),yMn^(2+)系列荧光粉。通过荧光粉的发射光谱和荧光衰减曲线证实Eu^(2+)、Mn^(2+)之间存在能量传递,且增大Mn^(2+)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Eu^(2+)的两个不同颜色的发射峰表现出不同的温度猝灭行为。Ca_(9.15)La_(0.9)(PO_(4))_(7)∶0.05Eu^(2+),0.35Mn^(2+)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。A series of Ca_(9.15)La_(0.9)(PO_(4))_(7)∶0.05Eu^(2+),yMn^(2+)and Ca_(9.3)La_(0.8)(PO_(4))_(7)∶0.05Eu^(2+),yMn^(2+)were synthesized by the high temperature solid-state method.The energy transfer from Eu^(2+)to Mn^(2+)was confirmed by the emission spectra and fluorescence decay curves.With increasing the concentration of Mn^(2+),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 Eu^(2+)with different colors exhibited different temperature quenching behaviors.The color coordinates of Ca_(9.15)La_(0.9)(PO_(4))_(7)∶0.05Eu^(2+),0.35Mn^(2+)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).

关 键 词：发光 荧光粉 能量传递 Ca_(9.15)La_(0.9)(PO_(4))_(7)∶0.05Eu^(2+) yMn^(2+) 

分 类 号：O614[理学—无机化学] O482.31[理学—化学]