title: Compositional and thermal effect on upconversion luminescence of Ho3+/Yb3+-codoped oxyfluoride glasses.
abstract: The upconversion luminescence properties of Ho3+/Yb3+-codoped SiO2-BaF2-ZnF2 glasses were investigated upon excitation with 980 nm diode laser. The visible emission bands centered at 546 and 661 nm correspond to 5F4, 5S2-->5I8 and 5F5-->5I8 transitions were observed. The effect of composition and temperature on the upconversion emission intensity was examined. It was found that the upconversion emission signals decrease with increasing ZnF2 content and temperature. The dependence of the upconversion emission intensity upon the excitation power was also examined, and the upconversion mechanisms were discussed.
authors.affiliation: Institute of Materials Science and Engineering, Shijiazhuang University of Economics, 136 Huaian East Road, Shijiazhuang, 050031, PR China. fengli5435@yahoo.com
authors.forename: Li
authors.initials: L
authors.lastname: Feng
authors.forename: Qiang
authors.initials: Q
authors.lastname: Su
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Chunrui
authors.initials: C
authors.lastname: Zheng
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Hongli
authors.initials: H
authors.lastname: Du
mesh_terms: D002412:Cations / Q000737:chemistry; D005461:Fluorine / Q000737:chemistry*; D005898:Glass; D006695:Holmium / Q000737:chemistry*; D049449:Luminescence; D010087:Oxides / Q000737:chemistry*; D013053:Spectrophotometry; D013696:Temperature; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D002412:Cations; D010087:Oxides; D005461:Fluorine; C014559:fluorine monoxide; D015018:Ytterbium; D006695:Holmium