Abstract: A series of 2 at.% Dy 3+ and x at.% Eu 3+ (x = 0, 0.1, 0.5, 1, 2, 5) codoped NaY(MoO4)2 were synthesized by high-temperature solid-state reaction method. The structure of the samples was characterized by XRD, SEM and FTIR, and it is shown that the synthesized samples have a tetragonal structure and a space group of I41/a. The excitation spectra and the emission properties under near-UV excitation of the samples were further investigated, and energy resonance transfer between Dy 3+ and Eu 3+ in NaY(MoO4)2 host was confirmed. The CIE coordinates of 2 at.% Dy 3+ and 2 at.% Eu 3+ codoped sample(x = 0.659, y = 0.338) are very close to the standard values specified by NTSC. Therefore, this phosphor is promising for being used as an excellent red phosphor with color rendering performance in solid-state lighting field. In addition, considering that NaY(MoO4)2 has the stable physicochemical properties and can be grown by Czochralski method, this study can provide a reference for exploring the single crystal growth and visible laser properties of Dy 3+ and Eu 3+ co-doped NaY(MoO4)2.

Key words: materials, high-temperature solid-state reaction method, NaY(MoO4)2, energy transfer; solid-state lighting