【作者】 刘春梦； 梁宏斌； 匡小军； 张彩华； 张粟； 周磊； 孙帅帅； 陶冶；

【Author】 Chunmeng Liu,~1 Hongbin Liang~(1,*) Xiaojun Kuang,~1 Caihua Zhang,~1 Su Zhang,~1 Lei Zhou,~1 Shuaishuai Sun~2 and Ye Tao~2 1 MOE Laboratory of Bioinorganic and Synthetic Chemistry,KLGHEI of Environment and Energy Chemistry,State Key Laboratory of Optoelectronic Materials and Technologies,School of Chemistry and Chemical Engineering,Sun Yat-sen University,Guangzhou 510275,China 2 Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039,China

【机构】 中山大学化学与化学工程学院,生物无机与合成化学教育部重点实验室,光电材料与技术国家重点实验室； 北京同步辐射实验室,中国科学院高能物理研究所；

【摘要】 用高温固相法台成了稀土离子Tb³⁺,Eu³⁺掺杂的多磷酸盐NaLa（PO₃）₄粉末样品。用X-射线粉末衍射数据对该系列样品进行了物相分析及结构表征,用Rietveld方法精修了其晶体结构参数,分析了掺杂离子变换对晶胞参数的调控作用。用同步辐射光源测试得到了样品的真空紫外（VUV）激发和发射光谱,结合晶体结构数据,研究了Tb³⁺,Eu³⁺离子掺杂的多磷酸盐新型稀土荧光材料的发光性质。系列样品在真空紫外到可见光区的光谱表明,在NaLa（PO₃）₄:Tb³⁺,Eu³⁺发光材料中,存在Tb³⁺向Eu³⁺的能量传递现象,通过改变Eu³⁺离子的掺杂浓度,可以实现从黄绿光到橙红光的可调发光。另外,我们通过荧光寿命衰减曲线和时间分辨光谱进一步研究了在NaLa（PO₃）₄基质材料中Tb³⁺离子向Eu³⁺离子的能量传递现象。更多还原

【Abstract】 Rare-earth-doped polycrystalline NaLa（PO₃）₄:Tb³⁺.NaLa（PO₃）₄:Eu³⁺,NaLa（PO₃）₄:Tb³⁺,Eu³⁺ phosphors were prepared by a high temperature solid state reaction route.Phase analysis and Rietveld refinement were performed on the powder X-ray diffraction date.Their vacuum-ultraviolet-visible luminescence properties were investigated by the steady state excitation and emission spectra,the luminescence decays,and the time-resolved emission spectra（TRES）.The results revealed that Tb³⁺ can efficiently transfer excitation energy to Eu³⁺ via its 5d and 4f states,results in tunable emission in a large color gamut.The energy-transfer process from Tb³⁺ to Eu³⁺ was also investigated and discussed in term of luminescence spectra and decay curves.更多还原