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- W4385855013 abstract "Neodymium-doped Y 2 Si 2 O 7 nanopowders were synthesized by sol-gel and annealed under varying annealing temperature conditions. The phase transformation of Y 2 Si 2 O 7 and the crystalline size change were observed with annealing temperature. Photoluminescence and the decay patterns of the 4 F 3/2 → 4 I 9/2, 4 I 11/2, and 4 I 13/2 transitions were examined to reveal the spectroscopic characteristics of the powders. The spectral outputs of Nd 3+ :Y 2 Si 2 O 7 phosphors remain strongly connected to the phase properties of Y 2 Si 2 O 7 . The positron lifetimes ( τ 2 , τ 3 , and τ 4 ) and intensities ( I 2 , I 3 , and I 4 ) obtained by positron annihilation lifetime spectroscopy were discussed for neodymium-doped Y 2 Si 2 O 7 phosphors to relate the structural and boundary changes in terms of the phases and molar contents of the Nd 3+ ions. The τ 2 and I 2 components were related to the structural open space in the grain, the τ 3 and I 3 components were correlated with vacancy-like defects in the grain boundaries, and the τ 4 and I 4 components were associated with vacancy defects in the grain, together with the effect of the increasing content of the Nd 3+ ions." @default.
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- W4385855013 date "2023-08-01" @default.
- W4385855013 modified "2023-09-27" @default.
- W4385855013 title "Investigation of Nd3+:Y2Si2O7 Phosphors Using Photoluminescence and Positron Annihilation Lifetime Spectroscopy" @default.
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- W4385855013 doi "https://doi.org/10.1149/2162-8777/acf0e9" @default.
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