Luminescence properties and energy-transfer behavior of Y 2- x - y Bi x Eu y MgTiO 6 phosphors.

Autor: Liu H; School of Electronic and Information Engineering, Guangdong Ocean University Zhanjiang, 524088, China., Guo J; School of Electronic and Information Engineering, Guangdong Ocean University Zhanjiang, 524088, China., Xu J; School of Electronic and Information Engineering, Guangdong Ocean University Zhanjiang, 524088, China., Zhang Z; School of Electronic and Information Engineering, Guangdong Ocean University Zhanjiang, 524088, China., Zeng C; School of Electronic and Information Engineering, Guangdong Ocean University Zhanjiang, 524088, China., Wang L; School of Electronic and Information Engineering, Guangdong Ocean University Zhanjiang, 524088, China., Xiong Z; School of Electronic and Information Engineering, Guangdong Ocean University Zhanjiang, 524088, China.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2023 Aug 19; Vol. 9 (8), pp. e19063. Date of Electronic Publication: 2023 Aug 19 (Print Publication: 2023).
DOI: 10.1016/j.heliyon.2023.e19063
Abstrakt: In recent years, double perovskite has become a research hotspot of luminescent matrix materials due to its flexible structure, easy doping and good thermal stability. By using a high temperature solid-state technique, Bi 3+ and Eu 3+ co-doped Y 2- x - y Bi x Eu y MgTiO 6 (0 ≤  x  ≤ 0.1, 0 ≤  y  ≤ 0.5) phosphors were made. X-ray diffraction (XRD) analysis shows that the crystal structure of all samples is monoclinic system, P2 1 /n; Bi 3+ and Eu 3+ can be doped into the position of Y 3+ in the substitution system of Y 2 MgTiO 6 . Both photoluminescence spectroscopy (PL) and X-ray excitation luminescence spectroscopy (XEL) were used to investigate the link between Bi 3+ and Eu 3+ doping concentrations and luminescence intensity. PL shows that: When 375 nm is used as the excitation wavelength, by varying the doping concentration of Eu 3+ in the Y 1.995- y Bi 0.005 Eu y MgTiO 6 phosphor, it is possible to create the color-tunable emission from blue to red; The introduction of an appropriate amount of Bi 3+ will increase the typical Eu 3+ emission; The way that the system's Bi 3+ and Eu 3+ exchange energy can be observed by combining the fluorescence decay curve and photoluminescence. Fitting by concentration quenching model shows that the resonant dipole-dipole transition is the mechanism of energy transfer between Bi 3+ →Eu 3+ ; X-rays may successfully stimulate the phosphor, and the spectral distribution of XEL and PL is basically the same; The introduction of an appropriate amount of Bi 3+ is also beneficial to improving the sensitivity of XEL; Changes in temperature affect the sample's emission intensity; In addition, the samples remain stable for an extended period while being continuously exposed to X-rays at various environmental temperatures. The a forementioned findings suggest that the phosphor has potential use value in the lighting industry, X-ray imaging and temperature sensor.
Competing Interests: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Zhengye Xiong reports financial support was provided by 10.13039/501100017290Zhanjiang Science and Technology Bureau. Jingyuan Guo reports financial support was provided by 10.13039/501100015600Guangdong Ocean University.
(© 2023 The Authors. Published by Elsevier Ltd.)
Databáze: MEDLINE
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