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| Type |
Poster Presentation |
| Area |
Analytical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
ANAL.P-268 |
| Subject |
Upconversion fluorescence and magnetic study of
NaLu0.98-xCrxEr0.02F4hollow microtubes
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| Authors |
Seong-Soo Lee, Huy B.T.1, YONG-ILL LEE1,*
Changwon National University, Korea
1Department of Chemistry, Changwon National University, Korea
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| Abstract |
Upconversion phosphors are known as a new material system that can convert near-infrared light into visible ultraviolet emissions by sequentially absorbing multiple photons. We presents a new non-rare earth (RE) sensitizing system with Cr3+ in NaLu0.98-xCrxEr0.02F4phosphor microtubes prepared by a hydrothermal method. The Cr3+ ions play the dual role as both host matrix and sensitizer in the upconversion process. The optimum conditions for gaining the strongest upconversion emission correspond to x = 0.3 ~ 0.5, where there are effective energy transfers between Cr3+ and Er3+ ions and Cr-Er dimers. The change of upconversion emission intensity is related to the presence/absence of absorbing multiple photons, and to the coupling between Cr3+ and Er3+ ions. The data obtained from magnetization and electron-spin-resonant measurements proved these phenomena, revealing the correlation between the optical and magnetic properties.
Keywords: Upconversion, dual role, magnetic, dimer.
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| E-mail |
zing3485@gmail.com |
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121st General Meeting of the KCS