La2.4Mo1.6O8:Yb3+,Er3+材料的制备及其上转换发光性质

doi:10.11944/j.issn.1000-0518.2016.10.160244

摘要/Abstract

摘要：

采用高温固相法制备了La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺荧光粉。通过X射线衍射(XRD)和上转换发射光谱对样品进行了相结构和发光性质表征。 XRD实验结果表明:合成的样品为面心立方萤石结构(Fm-3m)的La_2.4Mo_1.6O₈相。在980 nm红外光激发下,La_2.4Mo_1.6O₈: Yb³⁺,Er³⁺荧光粉发出分别来自Er³⁺离子的²H_11/2→⁴I_15/2、⁴S_3/2→⁴I_15/2跃迁的绿光(主峰为548和529 nm)和⁴F_9/2→⁴I_15/2跃迁的红光(主峰为670 nm)。进一步地,对样品中可能的上转换发光机制进行了讨论。

关键词: 上转换, 钼酸盐, 发光机理

Abstract:

La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺ phosphor was prepared by the hightemperature solid state reaction. The phase structures and luminescence properties of La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺ phosphors were examined by X-ray diffraction(XRD) and upconversion emission spectra, respectively. The XRD results show that the final sample is La_2.4Mo_1.6O₈ phase with a face centered cubic CaF₂ structure. Upon excitation of 980 nm pulsed laser, La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺ phosphor emitted the green emission lines and the red emission lines, which are originated from the ²H_11/2→⁴I_15/2, ⁴S_3/2→⁴I_15/2 and ⁴F_9/2→⁴I_15/2 transitions of Er³⁺, respectively. The possible upconversion luminescence mechanism in the sample is further discussed.

Key words: upconversion, molybdenum oxide, luminescence mechanism

张宁子, 周瑶伟, 于镇, 夏志国. La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺材料的制备及其上转换发光性质[J]. 应用化学, 2016, 33(10): 1140-1146.

ZHANG Ningzi, ZHOU Yaowei, YU Zhen, XIA Zhiguo. Preparation and Upconversion Luminescence Properties of La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺[J]. Chinese Journal of Applied Chemistry, 2016, 33(10): 1140-1146.

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La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺材料的制备及其上转换发光性质

Preparation and Upconversion Luminescence Properties of La_2.4Mo_1.6O₈:Yb³⁺,Er³⁺

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