Mechanism of Au core-shell nanoparticle(Au@SiO2)enhancement of europium luminescence
To enhance luminescence emitted by rare-earth organic thin films,gold nano core-shell structures(Au@SiO2)were introduced during preparation of rare-earth luminescent films.A drop-casting method was used,Au@SiO2 nanostructures with different molar concentrations were applied onto quartz slides.A mixture of Eu(dbm)3phen:PMMA:CH2C12 was then spin-coated onto quartz slides to fabricate thin films.Characterizations of these samples revealed that introducing Au@SiO2 significantly enhanced film luminescence intensity.Maximum excitation and luminescence enhancement factors were 279.1％and 222.9％respectively,with extended fluorescent lifetime.Incorporating Au@SiO2 into the fabrication process of rare-earth luminescent films effectively improves their luminous performance,with promising application potentials.
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