化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (8) : 190-193. DOI: 10.19817/j.cnki.issn 1006-3536.2020.08.042

科学研究

近紫外白光LED用Sr_3-xMgSi₂O₈:x% Sm³⁺(x=1～10)高效橙红色荧光粉的制备与发光性能研究

温慧霞, 尹喜爱, 李红喜, 樊彬, 赵文玉

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Preparation and property of high-efficiency orange-red phosphor for Sr_3-xMgSi₂O₈:x% Sm³⁺(x=1～10) near-UV white LED

Wen Huixia, Yin Xiai, Li Hongxi, Fan Bin, Zhao Wenyu

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文章历史 +

Received
2019-04-25
Issue Date	Revised Date
2020-10-23	2019-04-25

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摘要

采用传统高温固相法在较低温度下制备Sm³⁺离子掺杂Sr₃MgSi₂O₈橙红色荧光粉,研究了Sr_3-xMgSi₂O₈:x% Sm³⁺的晶体结构和发光性能。激发和发射光谱表明,样品可被近紫外350～420nm波段激发,最强激发峰位于402nm处,发射光谱呈现出Sm³⁺的特征橙红色,谱带峰值分别在563nm、601nm、644nm,对应于 ⁴G_5/2→⁶H_5/2、⁴G_5/2→⁶H_7/2和 ⁴G_5/2→⁶H_9/2特征跃迁。最强发射对应的掺杂浓度为5%(摩尔分数,下同),浓度猝灭的发生主要是因为非辐射荧光粉中Sm³⁺离子之间的能量转移。浓度为5%的CIE坐标为(0.5548,0.4366)最接近橙红色,获得极佳的演色性。样品Sr_3-xMgSi₂O₈:x% Sm³⁺荧光粉是一种具有应用潜力的近紫外激发三基色白光LED用橙红色荧光粉。

Abstract

The Sm³⁺ ion-doped Sr₃MgSi₂O₈ orange-red phosphor was prepared at a lower temperature by conventional high-temperature solid-phase method.The crystal structure and luminescence properties of Sr_3-xMgSi₂O₈:x% Sm³⁺ were studied.The excitation and emission spectra shown that the sample can be excited by the near-ultraviolet 350～420nm band,and the strongest excitation peak was located at 402nm.The emission spectrum exhibited characteristic orange-red emission of Sm³⁺,and the peak positions of the bands were at 563nm,601nm and 644nm.Corresponding to ⁴G_5/2→⁶H_5/2,⁴G_5/2→⁶H_7/2 and ⁴G_5/2→⁶H_9/2 characteristic transitions,respectively.The results shown that the doping concentration corresponding to the strongest emission was 5%,and the CIE coordinate was (0.5548,0.4366),which was closest to orange-red color,and obtained a lower color temperature and excellent color rendering.The sample Sr_3-xMgSi₂O₈:x% Sm³⁺ phosphor was an orange-red phosphor for near-ultraviolet excitation trichromatic white LED with potential application.

关键词

橙红色荧光粉 / Sm³⁺掺杂 / 高温固相法 / 白光LED

Key words

orange-red phosphor / Sm³⁺ doping / high temperature solid state method / white LED

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近紫外白光LED用Sr_3-xMgSi₂O₈:x% Sm³⁺(x=1～10)高效橙红色荧光粉的制备与发光性能研究[J]. 化工新型材料, 2020, 48(8): 190-193 DOI:10.19817/j.cnki.issn 1006-3536.2020.08.042

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