Sr7Sb2O12∶Dy3+荧光粉的制备及其发光性能

摘要/Abstract

摘要： 采用高温固相法制备了一系列新型Sr_7-xSb₂O₁₂∶xDy³⁺(x=0~0.35)(摩尔分数)荧光粉,并研究了Sr_7-xSb₂O₁₂∶xDy³⁺的物相结构、发光性能、热稳定性以及荧光寿命。在350 nm光激发下,Sr_7-xSb₂O₁₂∶xDy³⁺可以检测到中心波长在482 nm处的蓝光发射带和中心波长在576 nm处的黄光发射带,当x=0.056时,Dy³⁺浓度猝灭,Sr_6.944Sb₂O₁₂∶0.056Dy³⁺ CIE色坐标为(0.340 8,0.349 3),猝灭机理归因于电偶极-电偶极相互作用。当x=0.14时,该荧光粉可以发出色坐标为(0.310 9,0.314 0)的白光。此外,Sr_7-xSb₂O₁₂∶xDy³⁺在453 K的发光强度大约为室温下发光强度的83.3%,表现出良好的热稳定性。综合以上研究结果表明,Sr_7-xSb₂O₁₂∶xDy³⁺有望用于紫外光激发的白光发光二极管器件中。

关键词: Dy³⁺掺杂, Sr₇Sb₂O₁₂, 高温固相法, 荧光粉, 光致发光, 发光性能, 荧光寿命, 热稳定性

Abstract: A series of novel Sr_7-xSb₂O₁₂∶xDy³⁺(x=0~0.35) (mole percentage) phosphors were obtained by high temperature solid-state reaction. Its phase structure, luminescence properties, thermal stability and fluorescent decay lifetime were investigated. The characteristic emissions centered at 482 nm and 576 nm of Sr_7-xSb₂O₁₂∶xDy³⁺ were observed under the excitation light of 350 nm. When x=0.056, the Dy³⁺ concentration quench, and the Sr_6.944Sb₂O₁₂∶0.056Dy³⁺CIE chromaticity coordinates are (0.340 8, 0.349 3). The quenching mechanism is attributed to the dipole-dipole interaction between Dy³⁺. When x=0.14, the phosphors can emit white light with color coordinates (0.310 9, 0.314 0). In addition, the luminescence intensity of Sr_7-xSb₂O₁₂∶xDy³⁺ at 453 K is about 83.3% of that at room temperature, showing good thermal stability. The above research results suggest that the Sr_7-xSb₂O₁₂∶xDy³⁺ phosphor is expected to be used in UV-excited white light emitting diode.

Key words: Dy³⁺ doping, Sr₇Sb₂O₁₂, high temperature solid-state method, phosphor, photoluminescence, luminescence property, fluorescence lifetime, thermal stability

中图分类号:

O482.31

李浩来, 杨伟斌, 林易展, 凌爽, 熊飞兵. Sr₇Sb₂O₁₂∶Dy³⁺荧光粉的制备及其发光性能[J]. 人工晶体学报, 2022, 51(11): 1921-1928.

LI Haolai, YANG Weibin, LIN Yizhan, LING Shuang, XIONG Feibing. Preparation and Luminescent Properties of Sr₇Sb₂O₁₂∶Dy³⁺ Phosphors[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(11): 1921-1928.

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Sr₇Sb₂O₁₂∶Dy³⁺荧光粉的制备及其发光性能

Preparation and Luminescent Properties of Sr₇Sb₂O₁₂∶Dy³⁺ Phosphors

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