Matrix-induced synthesis and photoluminescence of M2RENbO6: Eu3+ (M = Ca, Sr, Ba; RE = Y, Gd, La) phosphors by hybrid precursors

Using rare earth coordination polymers with salicylic acid as precursors, composing with the polyethylene glycol (PEG) as dispersing media, the phosphor particles of M2RENbO6(M = Ca, Sr, Ba; RE = Y, Gd, La) were firstly synthesized via a novel modified in situ chemical co-precipitation technology. Their morphologies and particles have been analyzed by X-ray powder diffraction (XRD) and scanning electronic microscope (SEM), showing that these phosphors particles have the micrometer sizes. And the characteristic transitions of Eu3+ can be detected in all the host lattices corresponding to 5D0 → 7FJ (J = 1, 2, 3, 4) transitions. Besides this, those transitions from higher energy levels of Eu3+ are detected with a weaker intensity.