Preparation and luminescence properties of ZnWO4:Eu3+,Tb3+ phosphors

Abstract A series of ZnWO 4 :Eu 3+ ,Tb 3+ phosphors was prepared using a co‐precipitation method at room temperature. The structures and luminescence properties of the materials were characterized using X‐ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and UV–vis light, differential thermal analysis–thermogravimetric analysis, fluorescence spectra and the calculated Commission Internationale de l'Éclairage (CIE) coordinates. The results showed that the material had a monoclinic structure and the P2/c group was determined using XRD. FTIR spectroscopy confirmed the existence of W–O, Zn–O bonds, and Zn–O–W groups in WO 6 and ZnO 6 octahedra. In the excitation spectrum, there was an overlap of the broad band charge transfer bands belonging to O 2− →W 6+ and O 2− →Eu 3+ or O 2− →Tb 3+ transitions in the range 200–325 nm, and excitation bands between 350 and 500 nm belonged to the characteristic absorption bands for Eu 3+ and Tb 3+ . Therefore, the phosphor can be used as a single component tunable phosphor in light‐emitting diodes.