Photoluminescence properties of (Eu, Tb, Tm) co-doped PbMoO4 obtained by sonochemical synthesis

• Published in: Journal of alloys and compounds 2017-04, Vol.700, p.130-137
• Main Authors: Gurgel, G.M., Lovisa, L.X., Pereira, L.M., Motta, F.V., Li, M.S., Longo, E., Paskocimas, C.A., Bomio, M.R.D.
• Format: Article
• Language: English
• Subjects: Chemical synthesis; Crystal lattices; Crystal structure; Earth rare; Energy gap; Europium; Lattice parameters; Lead molybdates; Light emission; Luminescence; Order disorder; PbMoO4; Phase transitions; Phosphors; Photoluminescence; Rare earth elements; Sonochemistry; Structural analysis; Terbium; Thulium; Trace elements; Ultrasonic processing
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2016.12.409

The PbMoO4 co-doped with Tm3+, Tb3+ Eu3+ with scheelita structure was synthesized by the sonochemical method. The photoluminescent properties, structural and color coordinates emitted by phosphors were investigated. The structural analysis of the crystal and the changes in lattice parameters confirm that the rare earth ions (RE3+) were successfully introduced into the host of the PbMoO4. The relationship between energy gap (Egap) and the concentration of RE3+ ions was also discussed, the Egap is significantly influenced by the degree of structural order-disorder present in the crystal lattice. The PbMoO4:RE3+ shows light emission in green. Under UV excitation, Photoluminescence (PL) shows a broad band centered at 520 nm and smaller bands belonging to transitions of RE3+: 1G4 → 3F4 and 1D2 → 3H4 at 480 and 533 nm (Tm3+), 5D4 → 7Fj (j = 6, 5) at 493 and 550 nm (Tb 3+) 5D0 → 7Fj (j = 1, 2, 4) 593, 615 and 702 nm (Eu3+). [Display omitted] •The PbMoO4:RE materials presented here are promising photoluminescent materials.•These particles were successfully obtained by the sonochemical method.•The CIE coordinates calculated are disposed in the green region in the CIE diagram.