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
Chenxia Li, Shiqing Xu, Renguang Ye, Shilong Zhao, Degang Deng, and Songlin Zhuang, "Er3+/Tm3+/Yb3+ tridoped oxyfluoride glass ceramics with efficient upconversion white-light emission," Chin. Opt. Lett. 8, 66-69 (2010)