化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (11) : 245-251. DOI: 10.19817/j.cnki.issn1006-3536.2024.11.045

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基于Sm³⁺敏化的红色荧光粉Na₅Y(MoO₄)₄∶Eu³⁺发光性能研究

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Study on the luminescent properties of red phosphor Na₅Y(MoO₄)₄∶Eu³⁺ based on Sm³⁺ sensitization

Guo Yisheng, Hu Zhengkai, Bai Xin, Xiong Feibing

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Received		Published
2023-11-30		2024-11-20
Issue Date	Revised Date
2024-11-19	2023-11-30

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摘要

采用高温固相法制备了一系列新型Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14)和Na₅Y_0.9-y(MoO₄)₄∶0.1Eu³⁺,ySm³⁺(y=0～0.08)红色荧光粉,并对Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14)和Na₅Y_0.9-y(MoO₄)₄∶0.1Eu³⁺,ySm³⁺(y=0～0.08)的物相结构、发光性能、热稳定性、荧光寿命等性能进行了研究。结果表明,在单掺Eu³⁺的条件下,Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14)荧光粉在395nm紫外光激发下,发射出峰值波长在615nm的强红光,其掺杂浓度为x=0.1,样品的发光强度最高。进一步探究Sm³⁺对Eu³⁺在Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14)中的敏化增强作用。通过研究该样品不同Sm³⁺掺杂浓度下的荧光发射谱,发现Sm³⁺敏化增强的最佳掺杂浓度为y=0.04;相较于单掺Eu³⁺的样品,Sm³⁺敏化后的样品其发光强度为原来的113.8%。Sm³⁺敏化后的样品存在能量传递现象,能量传递机制为Eu³⁺与Sm³⁺之间的电偶极-电偶极相互作用。温度相关荧光发射谱实验结果表明Na₅Y_0.86(MoO₄)₄∶0.1Eu³⁺,0.04Sm³⁺具有较好的热稳定性,在437K时荧光发射强度约为室温时的70%左右,而Na₅Y_0.9(MoO₄)₄∶0.1Eu³⁺在437K时的荧光发射强度约为室温时的68%左右。因此,Sm³⁺敏化的Eu³⁺掺杂 Na₅Y(MoO₄)₄荧光粉在白光LED领域中具有较大的应用可能性。

Abstract

A series of novel Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14) and Na₅Y_0.9-y(MoO₄)₄∶0.1Eu³⁺,ySm³⁺(y=0～0.08) red phosphors were prepared by a high-temperature solid-phase method.The phase structure,luminescence properties,thermal stability,and fluorescence lifetime of Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14) and Na₅Y_0.9-y(MoO₄)₄∶0.1Eu³⁺,ySm³⁺(y=0～0.08) were investigated.The results showed that the Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14) phosphor emitted strong red light with a peak wavelength at 615nm under the excitation of UV light at 395nm under the condition of single doping of Eu³⁺,and the optimum doping concentration of x=0.1 resulted in the highest luminescence intensity of the sample.The sensitization enhancement effect of Sm³⁺ on Eu³⁺ in Na₅Y_1-x(MoO₄)₄∶xEu³⁺(x=0～0.14) was further explored.The fluorescence emission spectra of the sample with different Sm³⁺ doping concentrations were investigated,and it was found that the optimum doping concentration for the sensitization enhancement by Sm³⁺ was y=0.04;the luminescence intensity of the Sm³⁺-sensitized sample was 113.8% of that of the original sample compared with that of the sample doped with Eu³⁺ alone.There was an energy transfer phenomenon in the Sm³⁺ sensitized samples,and the energy transfer mechanism was an electric dipole-electric dipole interaction between Eu³⁺ and Sm³⁺.The temperature-dependent fluorescence emission spectra indicated that the Na₅Y_0.86(MoO₄)₄∶0.1Eu³⁺,0.04Sm³⁺ samples had good thermal stability,and the fluorescence emission intensity at 437K was about 70% of that at room temperature,while the fluorescence emission intensity of the Na₅Y_0.9(MoO₄)₄∶0.1Eu³⁺ sample at 437K was about 68% of that at room temperature.Therefore,the Sm³⁺-sensitized Eu³⁺-doped Na₅Y(MoO₄)₄ phosphors have a large potential for application in the field of WLEDs.

关键词

高温固相法 / Na₅Y(MoO₄)₄∶Eu³⁺ / Sm³⁺ / 荧光粉 / 发光性能 / 能量传递 / 热稳定性

Key words

high-temperature solid-phase method / Na₅Y(MoO₄)₄∶Eu³⁺ / Sm³⁺ / phosphor / luminescent properties / energy transfer / thermal stability

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基于Sm³⁺敏化的红色荧光粉Na₅Y(MoO₄)₄∶Eu³⁺发光性能研究[J]. 化工新型材料, 2024, 52(11): 245-251 DOI:10.19817/j.cnki.issn1006-3536.2024.11.045

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