Sr8Si4O12Cl8∶Eu3+,M3+(M3+=Sm3+,Al3+)中Eu3+的敏化发光

Sr₈Si₄O₁₂Cl₈∶Eu³⁺,M³⁺(M³⁺=Sm³⁺,Al³⁺)中Eu³⁺的敏化发光

摘要: 采用高温固相法合成了碱土氯硅酸盐Sr₈Si₄O₁₂Cl₈∶Eu³⁺,M³⁺(M=Sm³⁺,Al³⁺)发光材料,并通过激发光谱和发射光谱的测试,首次在碱土氯硅酸盐体系中研究了Sm³⁺、Al³⁺三价金属离子对Eu³⁺发光性能的影响及其相对发光强度随组成变化的规律.实验结果表明,Sm³⁺和Al³⁺掺入可大幅度提高Eu³⁺的发光强度,掺入Sm³⁺和Al³⁺后Eu³⁺的相对发光强度分别提高了7.3%和40.5%.Sm³⁺和Al³⁺对Eu³⁺有很好的敏化作用,其中Al³⁺的敏化作用尤为突出.Eu³⁺和Sm³⁺(Al³⁺)的最佳掺入量(摩尔分数)为8%和5%(18%).

Abstract: The alkali earth chlorosilicate of Sr₈Si₄O₁₂Cl₈:Eu³⁺,M³⁺(M³⁺=Sm³⁺,Al³⁺) was synthesized by the high temperature solid state method. The excitation and emission spectra were measured and the luminescent properties of red-photoluminescence were investigated. The effects of Sm³⁺ and Al³⁺ ions on the luminescence of Eu³⁺ ions and the relation of relative luminescence intensity to its composition were analyzed. The results show that M³⁺ (M=Sm³⁺, Al³⁺) ions can sensitize Eu³⁺ ions in Sr₈Si₄O₁₂Cl₈, with the relative luminescence intensity increasing 7.3% and 40.5%, respectively. The luminescence intensity reaches to the maximum when the molar fractions of Eu³⁺ and Sm³⁺ (Al³⁺) are 8% and 5% (18%), respectively.