title: Intrinsic single-band upconversion emission in colloidal Yb/Er(Tm):Na3Zr(Hf)F7 nanocrystals.
abstract: Novel Yb/Er(Tm):Na(3)MF(7) (M = Zr, Hf) nanocrystals with intrinsic single-band upconversion emission, in contrast to the routine lanthanide-doped fluoride nanocrystals which show typical multi-band upconversion emissions, are reported for the first time. Specifically, the red upconversion intensity of the Yb/Er:Na(3)ZrF(7) nanocrystals is about 5 times as high as that of the hexagonal Yb/Er:NaYF(4) ones with a similar crystal size.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
authors.forename: Daqin
authors.initials: D
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Lei
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Anping
authors.initials: A
authors.lastname: Yang
authors.forename: Ju
authors.initials: J
authors.lastname: Xu
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Wang
mesh_terms: D003102:Colloids / Q000737:chemistry*; D004871:Erbium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry; D006195:Hafnium / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D003102:Colloids; D028581:Lanthanoid Series Elements; D004871:Erbium; D015040:Zirconium; D015018:Ytterbium; D005459:Fluorides; D006195:Hafnium