FABRICATION AND STUDY OF STRUCTURE AND OPTICAL PROPERTIES OF Eu3+-DOPED MGF2 CERAMICS SYNTHESIZED BY PLASMA SINTERING METHOD

Nguyễn Thị Minh Thủy

doi:10.34238/tnu-jst.12396

FABRICATION AND STUDY OF STRUCTURE AND OPTICAL PROPERTIES OF Eu3+-DOPED MGF2 CERAMICS SYNTHESIZED BY PLASMA SINTERING METHOD

About this article

Received: 26/03/25 Revised: 14/06/25 Published: 15/06/25

Authors

Nguyen Thi Minh Thuy , TNU - University of Education

Abstract

In this study, MgF₂:Eu³⁺ ceramic samples with different Eu³⁺ concentrations (0, 0.2, 0.5, 1, 3 and 5%) were fabricated by plasma sintering method. The structure and optical properties were studied through X-ray diffraction, photoluminescence excitation, photoluminescence emission and fluorescence lifetime measurements. The results showed that Eu³⁺ can enter the MgF₂ crystal lattice without changing the structural phase but causing a slight shift in the X-ray diffraction pattern due to the substitution of Mg²⁺ ions. The fluorescence excitation spectrum recorded the characteristic absorption lines of Eu³⁺, with the strongest peak at 392 nm, suitable for excitation in red LED applications. The luminescence intensity reached the maximum at an Eu³⁺ concentration of 3%. The fluorescence lifetime decreases with increasing Eu³⁺ concentration. Eu³⁺ doping helps to create luminescent centers, enhance the luminescence ability and expand the application of the material in the fields of lighting, lasers and sensors.

Keywords

Ceramic; Rare earth; Optical properties; Structure; Eu3+

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DOI: https://doi.org/10.34238/tnu-jst.12396

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