The Eu<sup>2+</sup>/Tb<sup>3+</sup>/Sm<sup>3+</sup> co-doped oxyfluoride glass ceramics containing Ba<sub>2</sub>LaF<sub>7</sub> nanocrystals are prepared in the reducing atmosphere. The X-ray diffraction results show that Eu<sup>2+</sup>, Tb<sup>3+</sup> and Sm<sup>3+</sup> ions are enriched into the precipitated Ba<sub>2</sub>LaF<sub>7</sub> nanophase after the annealing process. It deduces efficient energy transfers from Eu<sup>2+</sup> to Tb<sup>3+</sup> and Sm<sup>3+</sup> and intenses warm white luminescence of the glass ceramics. Comparing with the glass, the luminescence quantum yield of the glass ceramics is also enlarged by about 3 times. This demonstrates the potential white light-emitting diode application of the glass ceramics produced in this letter.
© 2012 Chinese Optics Letters
Yang Xu, Shuo Cui, Hengyi Fu, Jiangyun Qian, Qun Luo, Xusheng Qiao, Xianping Fan, and Xianghua Zhang, "White light generation of glass ceramics containing Ba2LaF7:Eu2+, Tb3+ and Sm3+ nanocrystals," Chin. Opt. Lett. 10, 031602- (2012)