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Open AccessArticle

Growth of β-NaYF4:Eu3+ Crystals by the Solvothermal Method with the Aid of Oleic Acid and Their Photoluminescence Properties

by Jianhua Huang 1,2,†, Xiaojing Wang 1,†, An Shao 3,†, Guoping Du 1,* and Nan Chen 1,*
1
School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China
2
Hunan Engineering Laboratory for Control and Optimization of PV Systems, Hunan Vocational Institute of Technology, Xiangtan 411104, China
3
Queen Mary School, Nanchang University, Nanchang 330031, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Materials 2019, 12(22), 3711; https://doi.org/10.3390/ma12223711 (registering DOI)
Received: 16 October 2019 / Revised: 2 November 2019 / Accepted: 6 November 2019 / Published: 11 November 2019
(This article belongs to the Special Issue Advanced Luminescent Materials)
Lanthanide-doped hexagonal β-NaYF4 crystals have received much attention in recent years due to their excellent photoluminescence properties. However, lanthanide-doped β-NaYF4 crystals with micron and submicron scales as well as uniform morphology have received less attention. In this study, Eu3+-doped β-NaYF4 (β-NaYF4:Eu3+) crystals of micron and submicron size scales were synthesized using the solvothermal method with ethylene glycol as the solvent. The β-NaYF4:Eu3+ crystals were highly crystallized. A comparison of the characteristics of the β-NaYF4:Eu3+ crystals synthesized with and without the use of oleic acid as a surfactant was conducted. It was found that the utilization of oleic acid as a surfactant during their synthesis greatly decreased their particle size from micron to submicron scale, while adding a small amount of ethanol further reduced their particle size. In addition, they exhibited much smoother surfaces and more uniform morphologies, which were hexagonal prism bipyramids. The microstructural characteristics and photoluminescence properties of the β-NaYF4:Eu3+ crystals were studied in detail. Results showed that β-NaYF4:Eu3+ crystals prepared with the aid of oleic acid as a surfactant during their synthesis exhibited stronger photoluminescence. View Full-Text
Keywords: lanthanide-doped fluoride; Eu3+-doped β-NaYF4; photoluminescence; solvothermal method lanthanide-doped fluoride; Eu3+-doped β-NaYF4; photoluminescence; solvothermal method
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Huang, J.; Wang, X.; Shao, A.; Du, G.; Chen, N. Growth of β-NaYF4:Eu3+ Crystals by the Solvothermal Method with the Aid of Oleic Acid and Their Photoluminescence Properties. Materials 2019, 12, 3711.

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