Journal of Applied Spectroscopy ( IF 0.8 ) Pub Date : 2020-09-11 , DOI: 10.1007/s10812-020-01065-4 J. Sun , Q. Li , Q. Zhou
Eu3+-doped NaLaMo2O8 phosphors were synthesized by a conventional solid-state reaction. The phase and luminescent properties of the synthesized phosphors were investigated in the current work. In NaLaMo2O8, Eu3+ ions replace La3+ ions and form solid compound. This substitution induces the 2θ angles of diffraction peaks to shift to larger values. Under excitation at 395 nm, NaLaMo2O8:Eu3+ phosphors exhibit emission bands in the range of 550–725 nm originating from 5D0 → 7FJ transitions (J = 0, 1, 2, 3, 4) of Eu3+. The strongest emission band corresponds to the 5D0 → 7F2 transition, which indicates a site of Eu3+ without inversion symmetry in NaLaMo2O8. The Eu3+ concentration has obvious influence on the luminescent properties of NaLaMo2O8:Eu3+ phosphors. NaLaMo2O8:6 mol%Eu3+ has the strongest excitation and emission intensities.
中文翻译:
Eu 3+ -DOPED NaLaMo 2 O 8荧光粉的合成与红色发射
通过常规的固态反应合成了Eu 3+掺杂的NaLaMo 2 O 8荧光粉。在当前工作中研究了合成的磷光体的相和发光性质。在NaLaMo 2 O 8中,Eu 3+离子替代La 3+离子并形成固体化合物。该取代引起衍射峰的2θ角移动到更大的值。在395 nm激发下,NaLaMo 2 O 8:Eu 3+荧光粉显示出从5 D 0 → 7 F J发出的550-725 nm范围内的发射带Eu 3+的跃迁(J = 0、1、2、3、4)。最强的发射带对应于5 D 0 → 7 F 2跃迁,这表明在NaLaMo 2 O 8中没有反转对称的Eu 3+位点。Eu 3+浓度对NaLaMo 2 O 8:Eu 3+荧光粉的发光性能有明显影响。NaLaMo 2 O 8:6 mol%Eu 3+具有最强的激发和发射强度。