Abstract
The influence of silver nanoparticles on Er3+ up-conversion in CaF2
precipitated oxyfluoride glass-ceramics is investigated. After heat-treatments,
transmission electron microscopy images show that CaF2 nanocrystals precipitate in
the glass matrix uniformity, and sliver nanoparticles are spread around the CaF2
nano-crystals simultaneously. Comparing with the samples without Ag doped, high
efficiency up-conversion luminescences of Er3+ at 540 and 658 nm are distinctly
observed in the silver nanoparticles containing glass-ceramics by the 980-nm
excitation. Moreover, since the intensity ratio of green and red emissions changes
after silver nanoparticles precipitation, the up-conversion mechanism of Er3+ is
discussed.
© 2014 Chinese Optics Letters
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