The Preparation and Luminescence Properties of Stannate Red Phosphors for WLED

摘要

In this paper we have successfully prepared the red luminescent material of La_(0.01)Y_(1.99)Sn_2O_7: Eu~(3+), Dy~(3+) by the method of hydrothermal and sintering. The phase structure, surface morphology and fluorescence properties were investigated by the scanning electronic microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL). The EDS showed that the luminescent material is La_(0.01)Y_(1.99)Sn_2O_7: Eu~(3+), Dy~(3+). The SEM micrographs showed uniform particles with good crystallinity of luminescent material after sintering. PL spectrum showed the increasing of Eu~(3+) has great benefit for the increase of the luminous intensity of luminous materials. The optimal doping amount of Eu~(3+) ion and Dy~(3+) is 1:3 (nEu: nDy).