title: Highly intensified upconversion luminescence of Ca(2+) -doped Yb/Er:NaGdF(4) nanocrystals prepared by a solvothermal route.
abstract: Upon introducing Ca(2+) dopants into the grain lattices by substituting Gd(3+) ions, irregular Yb/Er:NaGdF4 nanocrystals prepared through a simple solvothermal route convert into highly uniform nanorods. Meanwhile, their upconversion luminescence intensifies by about 200 times, probably due to a modification of the crystal structure of NaGdF4 and an improvement in the crystallinity of the nanophase.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 (P. R. China), Fax: (+86) 591-83705402.
authors.forename: Lei
authors.initials: L
authors.lastname: Lei
authors.forename: Daqin
authors.initials: D
authors.lastname: Chen
authors.forename: Ju
authors.initials: J
authors.lastname: Xu
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Wang
mesh_terms: D002118:Calcium / Q000737:chemistry*; D004871:Erbium / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry; D005682:Gadolinium / Q000737:chemistry; D049449:Luminescence; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012964:Sodium / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D015018:Ytterbium / Q000737:chemistry
chemical_list: D004871:Erbium; D012964:Sodium; D005682:Gadolinium; D015018:Ytterbium; D005459:Fluorides; D002118:Calcium
keywords: doping; luminescence; nanocrystals; nanostructures; upconversion