化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (7) : 78-80. DOI: 10.19817/j.cnki.issn 1006-3536.2021.07.018

新材料与新技术

绿色荧光粉Li_4-3xSm_x(WO₄)₂的制备及发光性能研究

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Preparation and property of Li_4-3xSm_x(WO₄)₂ green phosphor

Liang Hongxia, Li Tao

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Received
2020-03-18
Issue Date	Revised Date
2021-08-19	2020-03-18

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摘要

采用水热法制备了Li_4-3xSm_x(WO₄)₂系列绿色荧光粉。通过扫描电镜、X射线衍射和荧光光谱等手段研究所得粉体形貌、结构和发光性能,分析了Sm³⁺变化对样品形貌和发光性能的影响。结果表明:所有Li_4-3xSm_x(WO₄)₂系列微晶样品均为四方晶系、白钨矿结构,该荧光粉可被蓝光(450nm)有效激发,最强发射波长位于568nm,获得高亮度绿光。随着x的增大,样品中Sm³⁺的568nm和664nm两个特征发射峰的强度先增大后减小,当x=0.4时达到最大。

Abstract

Li_4-3xSm_x(WO₄)₂ microcrystallines were synthesized by hydrothermal method.The crystal structure,surface morphology and room temperature photoluminescence properties of the microcrystallines were investigated by X-ray powder diffraction (XRD),scanning electron micrograph (SEM) and fluorescence analysis (FL),respectively.XRD results confirmed that the obtained Li_4-3xSm_x(WO₄)₂ microcrystallines all were typical scheelite structure with tetragonal symmetry.Fluorescence analysis results revealed that these phosphors can be effectively excited by blue (450nm) light,emitting the maxium line at 568nm with pure green light.The emission intensity of the two characteristic emission peaks of Sm³⁺ ion (located at 568nm and 664nm) initially increased,reached the maximum at 0.4,and then decreased with the increasing x.

关键词

Li_4-3xSm_x(WO₄)₂微晶 / 水热法 / 制备 / 发光性能

Key words

Li_4-3xSm_x(WO₄)₂ microcrystalline / hydrothermal method / preparation / luminescence property

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绿色荧光粉Li_4-3xSm_x(WO₄)₂的制备及发光性能研究[J]. 化工新型材料, 2021, 49(7): 78-80 DOI:10.19817/j.cnki.issn 1006-3536.2021.07.018

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