One-step synthesis of CaMoO4: Eu3+ nanospheres by ultrasonic spray pyrolysis

In this paper, CaMoO 4 and of Eu 3+ -doped CaMoO 4 nanospheres were prepared by a spray pyrolysis method and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Raman spectra and photoluminescence spectroscopy. XRD patterns indicate that these crystals have a scheelite-type tetragonal structure. The morphology of the CaMoO 4 : Eu 3+ nanospheres was investigated from the FESEM results and it was observed the formation of spherical particles peculiar to the synthesis method used. Sample of pure CaMoO 4 thermally treated 1000 °C exhibit a photoluminescence behavior broadband type with emission in white light according to the calculated values of the CIE coordinates: x = 0.37, y = 0.37. The emission intensity in the red for samples doped with Eu 3+ ( 5 D 0 → 7 F 2 in 615 nm) increases directly with the dopant concentration.