Highly uniform and monodisperse β-NaLuF4:Ln3+ (Ln = Eu, Tb, Dy, Sm, Tm, Ho) hexagonal prisms have been synthesized via a facile two-step hydrothermal method without any organic surfactants.
The higher power-sensitization triggers welding of the structure, favoring energy transfer between nanoparticles in Er3+/Yb3+ co-doped VO2.