Energy transfer and luminescence properties of Eu~3+-doped NaTb(WO_4)_2 phosphor prepared by a facile hydrothermal method

摘要

NaTb_(1-x)Eu_x(WO_4)_2 (x = 0-100%) phosphors have been synthesized via a mild hydrothermal process directly without further sintering treatment. X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence excitation and emission spectra and decay curve were used to characterize the samples. Moreover, the luminescence colors of NaTb_(1-x)Eu_x(WO_4)_2 (NTbWrEu) samples can be tuned from green, green-yellow, and yellow to red by simply adjusting the relative Eu~3+-doping concentrations under a single wavelength excitation, which might find potential applications in the light displays systems.