SEARCH

SEARCH BY CITATION

Keywords:

  • Multiphoton processes;
  • Nonlinear optical materials;
  • Optically active materials;
  • Phosphorescent materials;
  • Rare earth ions;
  • Up-conversion

Abstract

Nanocrystalline Ln3+-doped YF3 phosphors have been synthesized via a facile sonochemistry-assisted hydrothermal route. YF3 nanoparticles are demonstrated to be a good host material for different lanthanides. Varying the dopants leads to different optical properties. In particular, the feasibility of inducing red, green, and especially blue emission in the Yb3+/Er3+ co-doped YF3 sample by up-conversion excitation in the near-infrared region is demonstrated. Such unusually strong 411 nm blue up-conversion emission has seldom been reported in other Yb3+/Er3+-doped systems. The up-conversion mechanisms have been analyzed.