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How to design ultraviolet emitting persistent materials for potential multifunctional applications: a living example of a NaLuGeO4:Bi3+,Eu3+ phosphor

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Abstract

We report on the design of ultraviolet (UV) emitting persistent (PersL) materials. Understanding the luminescence mechanism of Bi3+ ions, the occupation rules of sites, the density functional theory (DFT) calculations and an empirical energy level scheme guided us to select the most appropriate emitters, host and traps. Finally, the NaLuGeO4:Bi3+,Eu3+ phosphor was successfully designed. The experimental results indicated that the NaLuGeO4:Bi3+,Eu3+ material is indeed able to emit excellent UV PersL, which can be recorded for more than 63 h. This exciting result is sufficiently encouraging for the initiation of a more thorough investigation. Accordingly, the excitation temperature-dependent and fading thermoluminescence experiments were conducted, and the trap properties were deeply studied by the initial rising method. The results reveal the PersL mechanism and the significant role of Eu3+ codopants as foreign traps. On the basis of this work, the UV PersL of the as-designed NaLuGeO4:Bi3+,Eu3+ material is certainly promising for some potential multifunctional applications, and the design concepts of this work are indeed effective and feasible for the design of PersL materials.

Graphical abstract: How to design ultraviolet emitting persistent materials for potential multifunctional applications: a living example of a NaLuGeO4:Bi3+,Eu3+ phosphor

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Publication details

The article was received on 26 Dec 2016, accepted on 25 Mar 2017 and first published on 28 Mar 2017


Article type: Paper
DOI: 10.1039/C6TC05598B
Citation: J. Mater. Chem. C, 2017, Advance Article
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    How to design ultraviolet emitting persistent materials for potential multifunctional applications: a living example of a NaLuGeO4:Bi3+,Eu3+ phosphor

    W. Wang, Z. Sun, X. He, Y. Wei, Z. Zou, J. Zhang, Z. Wang, Z. Zhang and Y. Wang, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C6TC05598B

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