Synthesis and characteristics of tb-doped Y2SiO5 nanophosphors and luminescent layer for enhanced photovoltaic cell performance.

Nanophosphors based on green emitting terbium doped yttrium silicates with the general formula Y2SiO5:Tb3+ with a size of 30-60 nm were synthesized by the hydrothermal method. The prepared nanophosphors were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy and fluorescence spectroscopy. It was found that the nanophosphors crystallize in an X1-type monoclinic structure (P2(1)/c) and absorb UV light from 220 to 300 nm which they then down-convert into visible-light (strong green emission at around 545 nm (5D4-->7F(J.

Hydrothermal synthesis, characterization and photocatalytic properties of Cu2PO4OH with hierarchical morphologies.

Cu2PO4OH with various hierarchical morphologies were synthesized using a hydrothermal method by simple adjusting the pH value and temperature. The prepared powders were characterized by X-ray diffraction (XRD), Raman spectroscopy, fourier-transform infrared spectroscopy (FT-IR), and UV-Vis diffuse reflectance spectroscopy. It was found that overall morphologies of Cu2PO4OH were varied from micro-rods to walnut-like microspheres as increasing the initial solution pH value and their size of the assembled crystallites was smaller at lower temperature.