化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (1) : 128-131.

科学研究

Eu³⁺掺杂的钼酸盐微纳米材料制备和光致发光性能研究

张现峰, 柴刘成, 张明虎, 许浩文

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Preparation and photoluminescence of Eu³⁺ doped molybdate micro/nano material

Zhang Xianfeng, Chai Liucheng, Zhang Minghu, Xu Haowen

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文章历史 +

Received
2017-08-08
Issue Date	Revised Date
2019-03-12	2017-08-08

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摘要

分别采用沉淀法和水热法成功制备了Y₂(MoO₄)₃:Eu³⁺红色荧光粉,使用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)和荧光光谱对其物相结构、形貌和发光性能进行表征。结果表明:Eu³⁺含量低于20%(摩尔分数,下同)不会改变Y₂(MoO₄)₃的晶体结构;沉淀法得到荧光粉呈花状,而水热法主要得到层层堆积结构的荧光粉;所制荧光粉的主激发峰和发射峰分别位于394和614nm,这是来自掺杂Eu³⁺的f-f电子跃迁。Y₂(MoO₄)₃荧光粉中Eu³⁺最佳摩尔分数为20%,当Eu³⁺含量大于20%时,出现浓度猝灭现象,其5D₀→7F₂发光浓度猝灭机理是电偶极-电偶极相互作用。

Abstract

Y₂(MoO₄)₃:Eu³⁺ red phosphors were successfully prepared by hydrothermal method and coprecipitation method,and the phase structures,morphology and luminescence properties were characterized by using X-ray powder diffraction (XRD),scanning electron microscopy (SEM) and fluorescence spectrometry.The results of XRD and SEM showed that the crystal structure of Y₂(MoO₄)₃ did not change with the concentration of Eu³⁺ below 20mol%,and the phosphor powder with flower shape was mainly obtained by coprecipitation method,while phosphor powder with layer by layer structure was mainly obtained by hydrothermal method.Fluorescence spectra showed that the main excitation peaks and emission peaks of resultant phosphors were located at 394nm and 614nm,respectively,which was the f-f electron transition from doped Eu³⁺.The optimal doping concentration of Eu³⁺ was 20%.When the doping concentration was more than 20%,the concentration quenching effect occured.The concentration quenching of 5D₀→7F₂ was caused by the interaction of electric dipole-electric dipole of Eu³⁺ according to Dexter theory.

关键词

钼酸钇 / 红色荧光粉 / 浓度猝灭 / 沉淀法和水热法

Key words

yttrium molybdate / red phosphor / concentration quenching / coprecipitation method and hydrothermal method

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Eu³⁺掺杂的钼酸盐微纳米材料制备和光致发光性能研究[J]. 化工新型材料, 2019, 47(1): 128-131 DOI:

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