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A facile route to controlled synthesis of β-NaLuF4:Ln3+ (Ln=Eu, Tb, Dy, Sm, Tm, Ho) and their tunable luminescent properties

Abstract

High uniformity and monodispersity β-NaLuF4:Ln3+ (Ln=Eu, Tb, Dy, Sm, Tm, Ho) hexagonal prisms have been synthesized via a facile two-step hydrothermal method without any organic surfactants. The structure, morphologies and luminescence properties of samples were investigated through XRD, SEM, and PL spectra. Furthermore, the shapes and sizes of the products can be further manipulated by adjusting pH values of solution. Upon excitation at 368 nm, the β-NaLuF4:Tb3+ phosphors exhibit the strongest green emission under pH = 9.0. Moreover, the photoluminescence properties of β-NaLuF4:Ln3+ were studied in detail, and it was found that the photoluminescence color of β-NaLuF4:0.03 Tm3+ phosphor was close to the standard blue light (0.14, 0.08). Under 356 nm irradiation, the multicolour emissions from blue to sapphire and then to pale green have been achieved in the Tm3+/Dy3+ co-doped β-NaLuF4 samples. The energy transfer process from Tm3+ to Dy3+ was studied and demonstrated to be an electric dipole-dipole interaction mechanism. It is obvious that the β-NaLuF4 phosphors may have potential applications in the field of full-color displays.

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Publication details

The article was received on 05 Jun 2018, accepted on 13 Jul 2018 and first published on 13 Jul 2018


Article type: Paper
DOI: 10.1039/C8CE00932E
Citation: CrystEngComm, 2018, Accepted Manuscript
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    A facile route to controlled synthesis of β-NaLuF4:Ln3+ (Ln=Eu, Tb, Dy, Sm, Tm, Ho) and their tunable luminescent properties

    J. Yang, L. Song, X. Wang, N. Luo, H. Wu, S. Gan and L. Zou, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE00932E

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