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The luminescence of sol-gel derived Zn 2 SiO 4 powder samples doped with Pb 2+ ions has been reported. The emission spectra of Pb 2+ -doped Zn 2 SiO 4 can be adjusted by changing the excitation wavelength. The blue, green, yellow and red emission peaks have all been observed from Pb 2+ -doped Zn 2 SiO 4 powder samples.
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