Fabrication and Photoluminescence Properties of Eu&lt;sup&gt;3+&lt;/sup&gt; Doped Y&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Ceramic Fiber with High Aspect Ratio

ZHANG, Li-zhen; Wang, Zi-Hao; Huang, Jieyu; Tang, Fei

doi:10.37188/cjl.20210297

Cited by 2 publications

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“…Since the molar ratio of C 2v occupancy to that of D 3h is 3, most Eu 3+ ions occupy the asymmetric site, and thus the 5 D 0 → 7 F 2 transition at 617 nm is stronger than the 5 D 0 → 7 F 1 transition at 595 nm [3]. However, the MC did not output a strong red light, mainly due to the fact that the hydroxyls directly coordinated to the rare earth ions Eu 3+ , which resulted in serious luminescence quenching [24]. Figure 9 shows the PLE and PL spectra for MC-RV, which was eroded by vanadate ions.…”

Section: Resultsmentioning

confidence: 98%

Eroding the Surface of Rare Earth Microcrystals through Vanadate Ions for Considerable Improvement of Luminescence

Qu¹,

Liu

Zhu

2022

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Developing an efficient approach to improve the luminescence of the phosphors without heating processing is a challenge, but attracts much attention. In the present paper, prismatic microcrystals of RE4O(OH)9NO3 (RE = Y, Eu) were synthesized by a hydrothermal reaction at 180 °C for 24 h. The reaction with VO3− did not change the crystal structure of the microcrystals and VO3− substituting for NO3− anions did not take place. However, it contributed to the formation of amorphous particles containing VO3− on the surface of a prism, which is similar to the surface corrosion of a metal, called “surface eroding”. Therefore, surface modification was successfully achieved by eroding the surface of the microcrystals through the reaction with vanadate ions. As a result of VO3−→Eu3+ energy transfer and the light-harvesting ability of VO3−, the red emission intensity at 617 nm of the modified microcrystals greatly increased. Eroding the surface of rare earth microcrystals recommends a new paradigm for luminescence improvement of rare earth compounds.

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Section: Resultsmentioning

confidence: 98%