title: Hydrothermal synthesis and tunable luminescence of persimmon-like sodium lanthanum tungstate:Tb3+, Eu3+ hierarchical microarchitectures.
abstract: Persimmon-like NaLa(WO(4))(2) microarchitectures were prepared via hydrothermal process with using trisodium citrate (Na(3)Cit) as chelated reagent and characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), photoluminescence (PL), and fluorescent dynamics. The influences of Na(3)Cit concentration, organic additivities, and reaction time on the morphologies of NaLa(WO(4))(2) phosphor were studied. The results revealed that Na(3)Cit species had double functions of strong ligand and structure-directing reagent that could efficiently control the formation of persimmon-like NaLa(WO(4))(2) microarchitectures. The possible mechanism for the growth of persimmon-like NaLa(WO(4))(2) microarchitectures was attributed to the Ostwald ripening mechanism. The energy transfer from Tb(3+) to Eu(3+) in the persimmon-like NaLa(WO(4))(2) phosphors was observed. The energy transfer efficiencies and emission colors can be tuned by changing the concentration of Eu(3+). Finally, it was deduced that the electric dipole-dipole interaction (D-D) is the main mechanism for energy transfer between Tb(3+) and Eu(3+) in the persimmon-like NaLa(WO(4))(2) phosphor.
authors.affiliation: Department of Physics, Dalian Maritime University, Dalian, Liaoning 116026, PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Tian
authors.forename: Baojiu
authors.initials: B
authors.lastname: Chen
authors.forename: Bining
authors.initials: B
authors.lastname: Tian
authors.forename: Naisen
authors.initials: N
authors.lastname: Yu
authors.forename: Jiashi
authors.initials: J
authors.lastname: Sun
authors.forename: Xiangping
authors.initials: X
authors.lastname: Li
authors.forename: Jinsu
authors.initials: J
authors.lastname: Zhang
authors.forename: Lihong
authors.initials: L
authors.lastname: Cheng
authors.forename: Haiyang
authors.initials: H
authors.lastname: Zhong
authors.forename: Qingyu
authors.initials: Q
authors.lastname: Meng
authors.forename: Ruinian
authors.initials: R
authors.lastname: Hua