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- W2314804425 abstract "Y2O3:Bi3+,Eu3+ nanosheets are produced by calcinating hydrothermally synthesized precursor nanosheets. Transmission electron microscope observation confirms that the sheet-like morphology remains unchanged after calcination at either 600 or 800 °C for 2 h. The excitation spectrum monitored at 612 nm emission corresponding to the 5D0→7F2 transition of Eu3+ has a broad band at 331 nm that is attributed to the 6s2→6s6p transition of Bi3+. The Y2O3:Bi3+,Eu3+ nanosheets therefore exhibit the red emission of Eu3+ through energy transfer from Bi3+ to Eu3+ following excitation of Bi3+. The photostability of Y2O3:Bi3+,Eu3+ nanosheets is evaluated from their change in photoluminescence intensity during continuous excitation. The photoluminescence intensity of Y2O3:Bi3+,Eu3+ nanosheets decreases to more than 90% of the initial intensity soon after irradiation begins, and then the photoluminescence intensity gradually recovers. In contrast, the photoluminescence intensity of YVO4:Bi3+,Eu3+ nanoparticles decreases to 53.6% of the initial intensity during excitation. These results indicate that Y2O3:Bi3+,Eu3+ nanosheets have higher photostability than YVO4:Bi3+,Eu3+ nanoparticles." @default.
- W2314804425 created "2016-06-24" @default.
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- W2314804425 date "2015-09-01" @default.
- W2314804425 modified "2023-10-01" @default.
- W2314804425 title "Synthesis, photoluminescence, and photostability of Y2O3:Bi3+,Eu3+ nanosheets" @default.
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- W2314804425 doi "https://doi.org/10.1016/j.jlumin.2015.04.011" @default.
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