Synthesis and photoluminescence of Eu3 + in Y1−xGdxAlO3 nanophosphors

Moon, Byung Kee; Kwon, Il Min; Jeong, Jung Hyun; Choi, Byung Chun; Yang, Hyun Kyoung; Kim, Junghwan; Yi, Soung Soo

doi:10.1088/0031-8949/2007/t129/063

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…Moreover, other satellite emission lines appear in the samples with the LaAlO 3 phase or as an effect of the La substitution at the Y site in the YAlO 3 structure. This fact can be explained by the rather different sensitivity to the departures from the site inversion symmetry for the above mentioned Eu 3+ transitions in both the YAlO 3 and LaAlO 3 structures [10,[24][25][26]. Not only does the relative intensity of the individual emission lines change, but the particular transitions are also split into a higher number of bands.…”

Section: Photoluminescence and Radioluminescence Of Samplesmentioning

confidence: 99%

Eu-DOPED La1-xYxAlO₃: IMPACT Of Y/La RATIO ON OPTICAL PROPERTIES

Havlíček¹

2022

Ceramics - Silikaty

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YAlO 3 and LaAlO 3 are both important oxides used as matrices in optical applications. Their mutual solid solubility is kinetically dependent, especially in a polycrystalline form. In this work, we prepared La 1-x Y x AlO 3 (x = 0 -0.65) samples doped with 5 at. % of Eu 3+ in the A-site. The samples were prepared by Spark Plasma Sintering from powders synthetised by a reverse co-precipitation method. The single-phase samples were obtained up to a composition of La 0.7 Y 0.25 Eu 0.05 AlO 3 ; with a higher yttrium doping level, a mixture of Y-rich and La-rich perovskite-type phases was present. The La/Y substitution had an influence on a shift in the top of the valence band which influenced the excitation spectra. In photoluminescence and radioluminescence measurements, the Eu 3+ local site symmetry changes were manifested by the change in intensity and fine splitting of the 5 D 0 → 7 F J (J = 1, 2, 3, 4, 5) emission bands. The increasing content of Y 3+ caused a slight acceleration of the PL decay of the Eu 3+ photoluminescence and an increase in the integral intensity of radioluminescence spectra.

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Section: Photoluminescence and Radioluminescence Of Samplesmentioning

confidence: 99%