RESUMEN
A series of emission-tunable NaLuF4:RE3+ (RE = Dy, Tb, Eu, Tm) phosphors were firstly synthesized by a glycine assisted one-step hydrothermal process. The structure and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results revealed that the samples were Na5Lu9F32, LuF3 and NaLuF4 and the size and shape of the products could be tuned just by adjusting the pH values of the initial reaction solutions or by adjusting the RE3+/NaF ratio or RE3+/NaBF4 ratio. The morphologies for the products include irregular particles, irregular blocks, octahedral shapes, hexagons, or micron sized hexagonal prisms. Furthermore, the photoluminescence properties of NaLuF4:Dy3+,Tb3+, NaLuF4:Tb3+,Eu3+, NaLuF4:Dy3+,Eu3+ and NaLuF4:Tm3+,Dy3+ were investigated in detail. Additionally, when co-doping Dy3+ with Tb3+ or Eu3+ or co-doping Tb3+with Eu3+ or co-doping Tm3+ with Dy3+ ions in the single component, colorful emission can be obtained by giving abundant blue, green, yellow, orange, and especially white-light-emission. All these properties indicate that the developed phosphor may potentially be used as single-component multicolor-emitting phosphors.