Preparation and properties of NaLa(WO4)2:0.08Eu3+ phosphors.

In the environment of advocating low-carbon economy, the development of green lighting and the potential application of rare earth luminescent light sources have always attracted much attention. In this study, aiming at the existing defects of white LED, taking the new red rare earth phosphor excited by ultraviolet light as the research object, Eu3+ doped NaLa(WO4)2:0.08Eu3+ phosphors samples were prepared by microwave method. The prepared samples were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), fluorescence spectrum (PL), CIE color coordinates and other detection methods, and their phase composition, micro-morphology and luminescent properties were characterized. The results show that the doping of Eu3+ does not change the crystal structure of the matrix material, and the NaLa(WO4)2:0.08Eu3+ phosphors is micron-sized and irregular polyhedral at room temperature. It can be excited by ultraviolet light with wavelength of 395 nm to produce red light emission. The color coordinates of NaLa(WO4)2:0.08Eu3+ phosphors are (0.5794, 0.308), and the manufactured device can emit white light with color coordinates of (0.3060, 0.3307). Therefore, the NaLa(WO4)2:0.08Eu3+ red phosphors prepared in this study is expected to be used in the preparation of white LED devices. [ABSTRACT FROM AUTHOR]