Template-free hydrothermal preparation of IR-blue light upconverting NaYF4: Yb, Eu phosphors

IF 2.7 4区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Boletin de la Sociedad Espanola de Ceramica y Vidrio Pub Date : 2024-03-01 DOI:10.1016/j.bsecv.2023.07.004

Cristina Ruiz-Santaquiteria , David G. Calatayud , Kevin Gutiérrez , Marina Villegas , Marco Peiteado , Teresa Jardiel

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Abstract

Highly efficient IR-blue light up-converting NaYF₄: Yb³⁺, Eu²⁺ phosphors have been prepared by a template-free hydrothermal method under mild and reductive experimental conditions. It has been demonstrated that for a fixed reaction time and temperature (150 °C/4 h), the α → β NaYF₄ conversion can be accurately controlled by modifying the F/Y ratio. UC emission spectroscopy reveals that IR-blue light emission efficiency is greatly improved when β-NaYF₄ phase predominates. Under the experimental conditions set in this work, reaching full α → β conversion just by increasing fluoride content entails the co-crystallization of the secondary phase YF₃ 1.5NH₃, but far from causing a detrimental effect on the optical properties, it has been found that the samples where both β-NaYF₄ and YF₃ 1.5NH₃ phases coexist, exhibit outstanding optical properties.

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无模板水热法制备红外蓝光上转换NaYF4:Yb，Eu荧光粉

在温和的还原实验条件下，通过无模板水热法制备了高效的红外蓝光上转换 NaYF4：Yb3+, Eu2+ 荧光粉。实验证明，在固定的反应时间和温度（150 °C/4小时）下，通过改变 F/Y 比例，可以精确控制α → β NaYF4 的转化率。紫外发射光谱显示，当 β-NaYF4 相占优势时，红外蓝光发射效率大大提高。在本文设定的实验条件下，仅通过增加氟含量就能达到完全的 α → β 转换，会导致次生相 YF3 1.5NH3 共晶，但β-NaYF4 和 YF3 1.5NH3 相共存的样品不但不会对光学特性造成不利影响，反而会表现出优异的光学特性。

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来源期刊

Boletin de la Sociedad Espanola de Ceramica y Vidrio 工程技术-材料科学：硅酸盐

CiteScore

5.50

自引率

2.90%

发文量

审稿时长

103 days

期刊介绍： The Journal of the Spanish Ceramic and Glass Society publishes scientific articles and communications describing original research and reviews relating to ceramic materials and glasses. The main interests are on novel generic science and technology establishing the relationships between synthesis, processing microstructure and properties of materials. Papers may deal with ceramics and glasses included in any of the conventional categories: structural, functional, traditional, composites and cultural heritage. The main objective of the Journal of the Spanish Ceramic and Glass Society is to sustain a high standard research quality by means of appropriate reviewing procedures.