Temperature affects on the photoluminescence and Judd-Ofelt intensity parameters of CaMoO4:Eu3+ nanophosphor

Eu3+ doped CaMoO4 nanophosphors were synthesized by hydrothermal method. X–ray powder diffraction analysis confirmed that all the compounds were crystallized in the scheelite–type tetragonal structure with I41/a (International Number 88) space group. The structural analysis and surface morphology were investigated by field emission scanning electron microscopy spectroscopy techniques. Photoluminescence (PL) spectra of Eu3+ doped CaMoO4 nanophosphors show emission peak at 613 nm (5D0 → 7F2). The Judd-Ofelt parameters have been calculated from the photoluminescence emission spectra of CaMoO4:Eu3+ with 5% doping concentration, in temperature range from 293 K to 693 K. Judd–Ofelt intensity parameters uniformly decrease with increasing temperature. The Judd–Ofelt parameters radiative lifetimes and emission cross–sections were calculated. The results indicate that the Eu3+ doped CaMoO4 nanophosphors are expected to have applications in the field of solid state lighting and other optical instruments. •The tetragonal CaMoO4:Eu3+ (1–7 mol %) phosphors were synthesized by hydrothermal method.•The Judd-Ofelt intensity parameter of Eu3+ in phosphors were calculated in temperature range from 293 K to 693 K.•Judd-Ofelt intensity parameters uniformly drop with increasing temperature.•SynThesized phosphors has red emission, has good thermal stability, has potential for solid lighting devices.