title: Intense blue up-conversion luminescence in Tm3+/Yb3+ codoped oxyfluoride glass-ceramics containing beta-PbF2 nanocrystals.
abstract: Up-conversion luminescence properties of a Tm3+/Yb3+ codoped oxyfluoride glass-ceramics under 980 nm excitation are investigated. Intense blue emission centered at 476 nm, corresponding to 1G4-->3H6 transitions of Tm3+ was simultaneously observed in the transparent oxyfluoride glass ceramics at room temperature. The intensity of the blue up-conversion luminescence in a 1 mol% YbF3-containing glass-ceramic was found to be about 40 times stronger than that in the precursor oxyfluoride glass. The reason for the intense Tm3+ up-conversion luminescence in the oxyfluoride glass-ceramics is discussed. The dependence of up-conversion intensities on excitation power and possible up-conversion mechanism are also evaluated.
authors.affiliation: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, The Laboratory for Laser Glass, Shanghai 201800, China. jjzhang@mail.siom.ac.cn
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
authors.forename: Zhongchao
authors.initials: Z
authors.lastname: Duan
authors.forename: Dongbing
authors.initials: D
authors.lastname: He
authors.forename: Shixun
authors.initials: S
authors.lastname: Dai
authors.forename: Liyan
authors.initials: L
authors.lastname: Zhang
authors.forename: Lili
authors.initials: L
authors.lastname: Hu
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D004735:Energy Transfer; D005459:Fluorides / Q000737:chemistry*; D005461:Fluorine / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D049449:Luminescence; D049329:Nanostructures / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013057:Spectrum Analysis; D013696:Temperature; D013932:Thulium / Q000737:chemistry*; D014961:X-Ray Diffraction; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D010087:Oxides; D005461:Fluorine; C077765:lead fluoride; D007854:Lead; C014559:fluorine monoxide; C023506:Glass ceramics; D013932:Thulium; D015018:Ytterbium; D005459:Fluorides