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- W2024193908 abstract "This work reports on the study about the luminescence behavior of Eu3+–O2− associates in Sr2SiO4 doped with Eu3+, or simultaneously doped with Eu3+ and Zn2+ ions, where the Zn2+ doping ion acts as a charge compensating agent. Both Sr2SiO4:Eu3+ and Sr2SiO4:Eu3+,Zn2+ emission spectra show two types of 5D0→7F0 type transitions, one type related to Eu3+ in the Sr2+ site, at 577 and 580 nm and the other one related to Eu3+–O2− associates, at 574 nm. Excitation spectra present two CT bands at 275 and 324 nm related to each emission center, respectively. Comparing the relative intensities between the emission spectra, the 0→0 transition at 574 nm assigned to Eu3+–O2− associates in the Sr2SiO4:Eu3+ emission spectrum is much more intense than the same transition in the Sr2SiO4:Eu3+,Zn2+ emission spectrum. Moreover, in the Sr2SiO4:Eu3+ excitation spectrum, the intensity ratio between the CT band related to the Eu3+–O2− emission center and Eu3+ 7F→5L6 transition is also larger than in the Sr2SiO4:Eu3+,Zn2+ one. Therefore, the presence of Zn2+ species provides an extra charge compensating mechanism, which decreases the formation of Eu3+–O2− associates." @default.
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- W2024193908 date "2002-10-01" @default.
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- W2024193908 title "Influence of Zn2+ co-doping ion on Eu3+–O2− associate luminescence in Sr2SiO4" @default.
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- W2024193908 doi "https://doi.org/10.1016/s0925-8388(02)00376-6" @default.
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