Preparation and luminescence properties of CaMoO4:Eu3+/Sm3+ phosphors

Eu3+ and/or Sm3+‐doped CaMoO4 phosphors were prepared using a hydrothermal method. The X‐ray diffraction (XRD) results show that the sample is in a tetragonal CaMoO4 phase, the space group is I41/a (88), the lattice constants are a = b = 5.226 Å, c = 11.430 Å, and V = 312.2 Å3. We explored the effects of Eu3+ doping concentration, reaction temperature, preparation time, and the energy transfer relationship between Eu3+ and Sm3+ on the phosphors. The Commission Internationale de l'éclairage (CIE) calculation results indicated that under excitation by ultraviolet light at 283 nm, the CIE coordinates of some CaMoO4:Eu3+/Sm3+ materials are located in the near‐white light region, and could be used as potential candidates for single‐matrix white phosphors. Eu3+, Sm3+ single‐ or double‐doped CaMoO4 phosphors were prepared using a hydrothermal method. The charge migration corresponding to a series of peaks in the excitation spectrum was explored using a fluorescence spectrometer and Gaussian fitting. Some CaMoO4:Eu3+, Sm3+ materials were excited by 283 nm near‐ultraviolet light to synthesize white light. The energy transfer process diagram of the Eu3+/Sm3+ co‐doped CaMoO4 system is also designed, indicating that it can be used as a potential candidate material for obtaining WLEDs.