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Y3Al5O12基質(zhì)中Sm3+離子濃度對(duì)其發(fā)光特性的影響
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江蘇省自然科學(xué)基金項(xiàng)目(BK2007724)


Influence of Concentration of Sm3+ Ions on the Luminescent Characteristics
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    摘要:

    采用溶膠-凝膠/燃燒合成法制備不同Sm3+摻量的Y3Al5O12發(fā)光體。用XRD，PL等手段研究樣品的物相結(jié)構(gòu)和光致發(fā)光性能與摻雜濃度之間的關(guān)系，并探討了Sm3+的自身濃度猝滅機(jī)制。結(jié)果表明：Sm3+摻量對(duì)樣品晶體結(jié)構(gòu)無(wú)明顯影響；Y3Al5O12:Sm3+樣品的激發(fā)主峰位于405 nm (6H5/2→4F7/2)附近，而最大發(fā)射峰在617 nm (4G5/2→6H7/2)；Sm3+在Y3Al5O12基質(zhì)中的最佳摻雜濃度為3.0 mol%，其自身濃度猝滅的原因主要是相鄰中心的電四極-電四極相互作用引起的交叉弛豫(4G5/2+6H5/2→6F9/2+6F9/2)所造成的

    Abstract:

    In this study, a series of Y3Al5O12:Sm3+ luminescent materials with different Sm doping were successfully synthesized by the sol-gel combustion method, and characterized by X-ray diffraction (XRD) and photoluminescence (PL) spectrum to investigate the relationships among structure, luminescent properties and Sm3+ concentration, and the mechanism of self concentration quenching of Sm3+. It is found that the Sm3+ concentration has no effect on the crystal structure with the strongest excitation peak of 405 nm, corresponding to the 6H5/2→4F7/2 transition of Sm3+. At 405 nm excitation, the Y3Al5O12:Sm3+ gives a red luminescence centered at about 617 nm (4G5/2→6H7/2). The suitable doping-concentration of Sm3+ in Y3Al5O12 is 3 mol%, and the quenching mechanism is the cross relaxation (4G5/2+6H5/2→6F9/2+6F9/2) caused by the interaction of electric quadrupoles between Sm3+ ions

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沐 磊,楊 浩,何 偉,王麗熙,張其土. Y3Al5O12基質(zhì)中Sm3+離子濃度對(duì)其發(fā)光特性的影響[J].稀有金屬材料與工程,2009,38(11):2032~2035.[Mu Lei, Yang Hao, He Wei, Wang Lixi, Zhang Qitu. Influence of Concentration of Sm3+ Ions on the Luminescent Characteristics[J]. Rare Metal Materials and Engineering,2009,38(11):2032~2035.]
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  • 收稿日期:2008-10-25
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