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- W2013118823 abstract "The excitation mechanism of photo- (PL) and electroluminescence (EL) of erbium ions co-implanted with ytterbium into the SiO 2 layer of light emitting MOS devices (MOSLED) was investigated. Ytterbium implanted and annealed samples exhibit the blue and near infrared electroluminescence. The blue electroluminescence at 470 nm appears due to cooperative up-conversion emission in the Yb 3+ –Yb 3+ system, and the near infrared EL at 975 and 1025 nm corresponds to transitions from the multiple state 2 F 5/2 to the 2 F 7/2 ground state in the Yb 3+ ions. The Er implanted SiO 2 exhibits the luminescence in the blue-green and infrared region. The green and blue peaks correspond to radiative transitions from the 2 H 11/2 or 4 S 3/2 energy levels and from the 2 H 9/2 or 4 F 5/2 energy levels to the 4 I 15/2 ground state, respectively. We have found that the energy transfer from Yb 3+ to Er 3+ ions exists only during photoluminescence excitation. The electroluminescence investigation shows the cooperative up-conversion in the Er 3+ –Yb 3+ system. ► The ratio of the maximum peak intensity (975 nm Yb 3+ /1535 nm Er 3+ ) as a function of the excitation current for different ytterbium concentration. The Er concentration was kept constant at 1.5%." @default.
- W2013118823 created "2016-06-24" @default.
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- W2013118823 date "2011-02-01" @default.
- W2013118823 modified "2023-09-24" @default.
- W2013118823 title "Electroluminescence from Er and Yb co-doped silicon dioxide layers: The excitation mechanism" @default.
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- W2013118823 doi "https://doi.org/10.1016/j.jnoncrysol.2010.12.002" @default.
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