Tuning Red Upconversion Emission in Single LiYF4:Yb3+/Ho3+ Microparticle

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• 作者：Wei Gao ; Ruibo Wang ; Qingyan Han ; Jun Dong ; Longxiang Yan ; Hairong Zheng
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：February 5, 2015
• 年：2015
• 卷：119
• 期：5
• 页码：2349-2355
• 全文大小：447K
• ISSN：1932-7455

文摘

The upconversion (UC) emission of single LiYF₄:Yb³⁺/Ho³⁺ microparticle with codoped Ce³⁺ is investigated. The UC emission tuning from green to red in single LiYF₄:Yb³⁺/Ho³⁺ microparticle is successfully obtained by codoping Ce³⁺ ions with different concentrations, and the enhancement mechanism of red emission is discussed in detail. The results indicate that two efficient cross-relaxations between Ho³⁺ and Ce³⁺ enhance the red and suppress the green emission in the UC process. The investigation on the luminescence property of a single microcrystal can effectively avoid the influence of the particles around and provide more precise information for better exploring the UC mechanism. The current study on the multicolor tuning of RE-doped micromaterials is also important for extending the application of rare-earth-doped micromaterials in micro-optoelectronic devices, color displays, and anticounterfeiting applications.