Dy3+掺杂Y2MgTiO6荧光粉的制备及发光性质研究

摘要/Abstract

摘要： 通过溶胶-凝胶法制备出一系列Dy³⁺掺杂的Y₂MgTiO₆(YMT∶Dy³⁺)荧光粉,并利用X射线衍射仪、扫描电子显微镜、荧光光谱仪对荧光粉的晶体结构、微观形貌及发光性质进行研究和分析。研究结果显示,YMT∶Dy³⁺荧光粉为双钙钛矿结构,Dy³⁺掺杂不改变样品的晶体结构。在近紫外光(352 nm)的激发下,样品的发射光谱显示出典型的Dy³⁺特征发射峰,分别是485 nm处的蓝光、578 nm处的黄光,以及650~700 nm的红光。当Dy³⁺摩尔浓度x=0.03时,荧光粉出现浓度猝灭效应,其浓度猝灭机制为电偶极子-电偶极子相互作用(d-d)。YMT∶Dy³⁺荧光粉的CIE色坐标明显受到Dy³⁺的浓度影响,其中YMT∶0.02Dy³⁺荧光粉的CIE色坐标为(0.406,0.407),位于暖白光区,可作为一种暖白光荧光粉应用于近紫外激发白光发光二极管(w-LEDs)。

关键词: 溶胶-凝胶法, Dy³⁺掺杂, Y₂MgTiO₆, 双钙钛矿结构, 暖白光, 白光发光二极管

Abstract: A series of Dy³⁺ doped Y₂M_gTiO₆ phosphors (YMT∶Dy³⁺) were synthesized by sol-gel method. The morphology, crystal structure and luminescence properties of these phosphors were characterized and analyzed by XRD, SEM and fluorescence analyzer. The results show that YMT∶Dy³⁺ phosphor has a double perovskite structure, and Dy³⁺ doping does not change the crystal structure of the sample. Under the excitation of near UV light (352 nm), the emission spectrum of the sample shows typical Dy³⁺characteristic emission, which is located at 485 nm in blue light region, 578 nm in yellow region and 650~700 nm in red region respectively. The concentration quenching occurred when the molar concentration of Dy³⁺ x=0.03 for YMT∶Dy³⁺phosphor and its mechanism is ascribed to dipole-dipole interaction (d-d). The CIE color coordinates of YMT∶Dy³⁺ phosphors are significantly affected by the concentration of Dy³⁺. Among them, the CIE color coordinate for YMT∶0.02Dy³⁺ phosphor is (0.406, 0.407), which is located in the warm white light region, and shows potential application for the n-UV excited warm white light emitting diodes (w-LEDs).

Key words: sol-gel method, Dy³⁺doping, Y₂MgTiO₆, double perovskite structure, warm white light, w-LEDs

中图分类号:

蒋小康, 张王曦月, 高峰, 周恒为. Dy³⁺掺杂Y₂MgTiO₆荧光粉的制备及发光性质研究[J]. 人工晶体学报, 2023, 52(10): 1809-1815.

JIANG Xiaokang, ZHANG Wangxiyue, GAO Feng, ZHOU Hengwei. Synthesis and Luminescence Property of Dy³⁺ Doped Y₂MgTiO₆ Phosphor[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(10): 1809-1815.

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Dy³⁺掺杂Y₂MgTiO₆荧光粉的制备及发光性质研究

Synthesis and Luminescence Property of Dy³⁺ Doped Y₂MgTiO₆ Phosphor

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