Selective growth and upconversion photoluminescence of Y-based fluorides: from NaYF4: Yb/Er to YF3: Yb/Er crystals

Author:

Xie JuanORCID,Hu Wenbo,Tian Dan,Wei Yang,Zheng Guangchao,Huang Ling,Liang ErjunORCID

Abstract

Abstract Y-based fluorides have been recognized as most efficient host materials for upconversion photoluminescence (UC-PL). Herein, we have produced a series of Yb/Er doped Y-based fluorides with specific crystal structures, shapes and sizes. The selective growth process is governed by our pre-designed surfactant 4, 4′-((2,5-bi’s (2-(diethylamino) ethoxy) −1,4-phenylene) bis (ethyne-2,1-diyl)) dibenzoic acid (DBA) and selective solvents. It is shown that highly pure hexagonal microprisms and cubic microspheres of NaYF4: Yb/Er could be selectively grown in water at low and high content of DBA, respectively, while only orthorhombic nanowires and microflowers of YF3: Yb/Er could be obtained in ethanol. Finally, all these materials obtained exhibit strong UC-PL signal while the UC emission intensity of the NaYF4: Yb/Er hexagonal microprisms is much higher than those of the cubic microspheres and orthorhombic YF3 nanowires and microflowers. This work provides a novel method for selective crystal growth of Y-based fluorides with specific shape, size, crystal phase and highly UC-PL efficiency by breaking the intrinsic limitation of crystal growth habit, which could be possibly extended to the controlled synthesis of other related materials.

Funder

Postdoctoral Research Sponsorship in Henan Province

National Natural Science Foundation of China

Publisher

IOP Publishing

Subject

Electrical and Electronic Engineering,Mechanical Engineering,Mechanics of Materials,General Materials Science,General Chemistry,Bioengineering

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