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- Title
Synthesis and efficient multicolor luminescence property of single-phase Eu<sup>3+</sup> and Tb<sup>3+</sup>-doped Gd<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub>.
- Authors
Li, Yanhong; Zhang, Xingao
- Abstract
White light-emitting diodes (WLEDs) represent an attractive alternative to conventional white light sources due to its extraordinary properties in efficiency, durability, and cost-effectiveness. The exploration of highly efficient phosphors that can be excited by deep-UV LED chips has garnered substantial interest in recent years. In this study, we reported novel Eu3+ and Tb3+-co-doped Gd2(MoO4)3 phosphors which were prepared using heat treatment method on precursor synthesized via hydrothermal method. To explore the properties of efficient multicolor phosphors and understand the emission mechanism of the phosphors, we conducted spectroscopic studies on Gd2(MoO4)3:Eu3+, Tb3+ phosphors with various doping concentrations of Eu3+ and Tb3+. A comparison of a variety of spectroscopic techniques reveals that Tb3+ ions can transfer energy to surrounding Eu3+ ions due to matched energy level. The condition for energy transfer to occur is that the concentration of doped Eu3+ should not surpass its quenching threshold in Gd2(MoO4)3, while maintaining an appropriate doping concentration of Tb3+. Otherwise, co-doped Tb3+ may facilitate the energy transfer to the quenching centers of Eu3+, thereby inhibiting the emission of Eu3+. The calculated CIE color coordinates indicate that the emission color of phosphors can be tuned by adjusting the concentration of doping ions. The combined data suggest that the phosphor is a promising single host matrix-based multicolor emission material for use in the production of WLEDs.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 6, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12242-y