Abstract
A novel Tm<sup>3+</sup>/Er<sup>3+</sup>/Yb<sup>3+</sup> triply-doped glass
ceramics containing BaF<sub>2</sub> nano-crystals are successfully prepared. Fluoride
nanocrystals BaF<sub>2</sub> are successfully precipitated in glass matrix, which is affirmed
by the X-ray diffraction results. The intense blue (476 nm), green (543 nm), and red
(656 nm) emissions of the glass ceramics are simultaneously observed at room
temperature under 980-nm excitation, and the emission luminescence intensity
increases significantly compared with the precursor glass, which is attributed to the
low phonon energy of fluoride nanocrystals when rare-earth ions are incorporated into
the precipitated BaF<sub>2</sub> nanocrystals. Under 980-nm excitation at 400 mW, the
international commission on illumination (CIE) chromaticity coordinate (X = 0.278, Y
= 0.358) of the tridoped oxyfluoride glass ceramics' upconversion emissions is close
to the standard white-light illumination (X = 0.333, Y = 0.333). The results
indicate that Tm<sup>3+</sup>/Er<sup>3+</sup>/Yb<sup>3+</sup> triply doped glass
ceramics can act as suitable materials for potential three-dimensional displays
applications.
© 2010 Chinese Optics Letters
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