化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (10) : 88-90.

新材料与新技术

近紫外白光LED用Ca_2-xSiO₃Cl₂∶xEu³⁺高效红色荧光粉的发光性能研究

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Luminous property of highly efficient red phosphor Ca_2-xSiO₃Cl₂∶xEu³⁺(x=3%～18%) for NUV white-LEDs

Wen Huixia, Zhou Yan, Fan Bin, Li Min, Zhao Wenyu

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Received		Published
2018-05-23		2019-10-20
Issue Date	Revised Date
2019-11-09	2018-05-23

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摘要

采用传统的高温固相反应法在较低温度下制备红色荧光体Eu³⁺掺杂的Ca₂SiO₃Cl₂,研究了 Ca_2-xSiO₃Cl₂∶xEu³⁺(x=3%～18%)的晶体结构和发光性质。激发和发射光谱表明,样品可以被近紫外350～420nm波段激发,最强激发峰位置位于394nm,发射光谱呈现出Eu³⁺的特征红色发光,谱带峰值位置在592nm和620nm,分别对应于 ⁵D₀→⁷F₁和 ⁵D₀→⁷F₂特征跃迁。结果表明:最强发射对应的掺杂浓度是15%(摩尔分数),样品Ca_1.85SiO₃Cl₂∶0.15Eu³⁺荧光粉是一种具有应用潜力的近紫外激发三基色白光LED用红色荧光粉。

Abstract

The red phosphors Eu³⁺ doped Ca₂SiO₃Cl₂ were prepared at a lower temperature using traditional high-temperature solid-state reaction method.The crystal structure and luminous properties of Ca_2-xSiO₃Cl₂∶xEu³⁺ were studied.The excitation and emission spectra shown that the sample can be excited in the near-ultraviolet 350～420nm band,with the strongest excitation peak at 394nm.The emission spectrum exhibited a characteristic red emission of Eu³⁺.The peak positions of the bands were at 592nm and 620nm,corresponding to ⁵D₀→⁷F₁ and ⁵D₀→⁷F₂ electron transitions.The results shown that the optimal doping concentration was 15%.The sample Ca_1.85SiO₃Cl₂∶0.15Eu³⁺ phosphor was a promising red-emitting phosphor for near trichromatic phosphors conversion white-LEDs with NUV chips.

关键词

红色荧光粉 / Eu³⁺掺杂 / 高温固相法 / 发射光谱 / 白光LED

Key words

red phosphor / Eu³⁺ doping / high temperature solid state method / emission spectrum / white-LEDs

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近紫外白光LED用Ca_2-xSiO₃Cl₂∶xEu³⁺高效红色荧光粉的发光性能研究[J]. 化工新型材料, 2019, 47(10): 88-90 DOI:

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