Intense red emitting monoclinic LaPO4:Eu3+ nanoparticles: host–dopant energy transfer dynamics and photoluminescence properties

摘要: LaPO4 nanoparticles were synthesized using complex polymerization method and characterized systematically X-ray diffraction (XRD), transmission electron microscopy (TEM) photoluminescence (PL) spectroscopy. Varied concentration of europium ion is doped in the lattice optical properties Judd–Ofelt analysis investigated. It observed that give violet–blue emission when irradiated with UV light. On doping band gap decreases. Based on DFT calculations it proposed energy range over which d f states Eu are distributed coincident valence so causing an efficient transfer from to ion. The actual site symmetry for lanthanum orthophosphate was also evaluated as D2d based Stark splitting pattern although C1 La3+ LaPO4. critical energy-transfer distance Eu3+ ions evaluated, quenching mechanism verified be electric multipolar interaction. red intensity LaPO4:Eu3+ (2.0 mol%) almost 85% a commercial phosphor, clearly demonstrates as-prepared samples promising phosphors under near-UV use white-light emitting diodes.