Pr^3＋掺杂对SrAl2O4：Eu^2＋、Dy^3＋磷光体发光性能的影响

Effect of Pr^(3+) on Luminescent Properties of SrAl_2O_4:Eu^(2+),Dy^(3+) Phosphor Prepared by Combustion Synthesis

用燃烧法制备Pr^(3+)掺杂的SrAl_2O_4:Eu^(2+)、Dy^(3+)长余辉发光粉体,研究了Pr^(3+)掺杂对其发光性能的影响。结果表明,合成的单相SrAl_2O_4样品具有单斜晶系结构,荧光发射光谱是连续宽带谱,峰位于515 nm,激发光谱是峰值在320 nm和360 nm的连续宽带谱。掺杂Pr^(3+)对形成晶粒尺寸均匀的固溶体有一定的促进作用,使其余辉初始亮度为不掺杂时的3倍。

Pr^3＋ doped SrAl2O4：Eu^2＋,Dy^3＋ phosphor was synthesized by combustion method. The modification of optical properties of the sample has been investigated.X-ray diffraction pattern indicates that the samples possess a monoclinic crystal structure.The emission spectra shows a continuous luminescence band with a peak at 515nm and excitation spectra shows two peaks at 320 and 360 nm.The decay curves show that the initial intensity is three times before doping praseodymium.The morphology shows praseodymium has a great role in formating uniform grain size solid solution in SrAl2O4：Eu^2＋, Dy^3＋,Pr^3＋ phosphor.