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Rare earth ion Tb3+ doped natural sodium feldspar (NaAlSi3O8) Luminescent properties and energy transfer

机译:稀土离子Tb3 +掺杂的天然钠长石(NaAlSi3O8)发光性能和能量转移

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摘要

In this study, Tb3+—doped natural sodium feldspar (NaAlSi3O8) phosphors have been successfully prepared using high−temperature solid—state method with natural sodium feldspar as a substrate. Energy—dispersive X—ray spectrometry analysis (EDX) of NaAlSi3O8 showed that 0.03 wt% of Eu element was present, and elemental distribution mapping analysis showed that the distribution of trace Eu in minerals was aggregated. The crystal structure and luminescence properties of the natural sodium Eu—containing feldspar and synthetic sodium feldspar NaAlSi3O8:Eu3+, Tb3+ phosphors are discussed in detail. The crystal structure analysis of the samples showed that the Na+ in the natural matrix was partly replaced by the doped Tb3+. Studies on the photoluminescence properties of the samples indicate that Eu does not form a luminescent center in the natural mineral, however, the strong characteristic peak of Eu3+ at 615 nm appears after doping with Tb3+ and the peak at 615 nm increases with the increase of Tb3+ concentration. According to the above spectral results, the energy transfer from Tb3+ to Eu3+ is obtained. Through the measurement and analysis of color coordinates, it is found that with the increase of Tb3+ concentration, the luminescence color of the samples can be regulated in the green to red region. NaAlSi3O8:Eu3+ Tb3+ phosphors has potential application value.
机译:在这项研究中,已经成功地使用高温固态法,以天然钠长石为基质,成功地制备了掺有Tb 3 + 的天然钠长石(NaAlSi3O8)荧光粉。 NaAlSi3O8的能谱-X射线能谱分析(EDX)表明存在0.03 wt%的Eu元素,元素分布图分析表明痕量Eu在矿物中的分布是聚集的。详细讨论了天然含钠长石和合成钠长石NaAlSi3O8:Eu 3 + ,Tb 3 + 荧光粉的晶体结构和发光性能。样品的晶体结构分析表明,天然基质中的Na + 被掺杂的Tb 3 + 部分取代。对样品的光致发光特性的研究表明,Eu在天然矿物中未形成发光中心,但是,在掺入Tb 之后,Eu 3 + 在615 nm处出现了很强的特征峰。 3 + ,随着Tb 3 + 浓度的增加,在615 nm处的峰增加。根据以上光谱结果,获得了从Tb 3 + 到Eu 3 + 的能量转移。通过色坐标的测量和分析发现,随着Tb 3 + 浓度的增加,样品的发光颜色可以在绿色到红色区域进行调节。 NaAlSi3O8:Eu 3 + Tb 3 + 荧光粉具有潜在的应用价值。

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