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- W2000613602 abstract "Novel oxyfluoride glass doped with YbF3 and Eu2O3 is synthesized in the SiO2–PbO–PbF2–CdF2 system by melt-quenching technique. Its physical properties, as well as the optical absorption of Eu3 + and Yb3 + ions are studied. Spectroscopic properties of Eu3 + ions are modeled within modified Judd–Ofelt theory, yielding absorption oscillator strength, luminescence branching ratios and radiative lifetime of 5D0 state. Intrinsic emission of Eu3 + ions under direct excitation in the UV, as well as up-conversion luminescence under near-IR excitation via cooperative energy transfer, 2Yb3 + → Eu3 +, are studied. In the latter case, the glass provides intense reddish-orange emission with CIE coordinates x = 0.636, y = 0.363. The asymmetry parameter R for Eu3 + emission in the studied glass is about 8. The efficiency of this transfer mechanism is estimated from shortening of 2F5/2(Yb3 +) lifetime to be 10 ± 1%." @default.
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- W2000613602 date "2014-06-01" @default.
- W2000613602 modified "2023-09-29" @default.
- W2000613602 title "Cooperative up-conversion in Eu3+,Yb3+-doped SiO2–PbO–PbF2–CdF2 oxyfluoride glass" @default.
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- W2000613602 doi "https://doi.org/10.1016/j.jnoncrysol.2014.04.004" @default.
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