Sr8Si4O12Cl8∶Eu3+,M3+(M3+=Sm3+,Al3+)中Eu3+的敏化發光

Sr₈Si₄O₁₂Cl₈∶Eu³⁺,M³⁺(M³⁺=Sm³⁺,Al³⁺)中Eu³⁺的敏化發光

摘要: 采用高溫固相法合成了堿土氯硅酸鹽Sr₈Si₄O₁₂Cl₈∶Eu³⁺,M³⁺(M=Sm³⁺,Al³⁺)發光材料,并通過激發光譜和發射光譜的測試,首次在堿土氯硅酸鹽體系中研究了Sm³⁺、Al³⁺三價金屬離子對Eu³⁺發光性能的影響及其相對發光強度隨組成變化的規律.實驗結果表明,Sm³⁺和Al³⁺摻入可大幅度提高Eu³⁺的發光強度,摻入Sm³⁺和Al³⁺后Eu³⁺的相對發光強度分別提高了7.3%和40.5%.Sm³⁺和Al³⁺對Eu³⁺有很好的敏化作用,其中Al³⁺的敏化作用尤為突出.Eu³⁺和Sm³⁺(Al³⁺)的最佳摻入量(摩爾分數)為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.