title: Study of luminescence properties of novel Er3+ single-doped and Er3+/Yb3+ co-doped tellurite glasses.
abstract: The novel Er(3+) single-doped and Er(3+)/Yb(3+) co-doped tellurite glasses were prepared. The effect of Yb(2)O(3) concentration on absorption spectra, emission spectra and upconversion spectra of glasses were measured and investigated. The emission intensity, fluorescence full width at half maximum (FWHM) and upconversion luminescence of Er(3+) go up with the increasing concentration of Yb(3+) ions. The maximum FWHM of (4)I(13/2) --> (4)I(15/2) transition of Er(3+) is approximate 77 nm for 1.41 x 10(21)ions/cm(3) concentration of Yb(3+)-doped glass. The visible upconversion emissions at about 532, 546 and 659 nm, corresponding to the (2)H(11/2) --> (4)I(15/2), (4)S(3/2) --> (4)I(15/2) and (4)F(9/2) --> (4)I(15/2) transitions of Er(3+), respectively, were simultaneously observed under the excitation at 970 nm. Subsequently, the possible upconversion mechanisms and important role of Yb(3+) on the green and red emissions were discussed and compared. The results demonstrate that this kind of tellurite glass may be a potentially useful material for developing potential amplifiers and upconversion optical devices.
authors.affiliation: College of Information Science and Engineering, Ningbo University, Ningbo 315211, China. gybetty@sohu.com
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gao
authors.forename: Qiu-Hua
authors.initials: QH
authors.lastname: Nie
authors.forename: Tie-Feng
authors.initials: TF
authors.lastname: Xu
authors.forename: Xiang
authors.initials: X
authors.lastname: Shen
mesh_terms: D004871:Erbium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D008163:Luminescent Measurements; D010087:Oxides / Q000737:chemistry*; D010714:Phosphatidylethanolamines; D013053:Spectrophotometry; D013691:Tellurium / Q000737:chemistry*; D013932:Thulium / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*
chemical_list: C410262:1,2-dioleoyl-glycero-3-phosphatidyl ethanolamine; D010087:Oxides; D010714:Phosphatidylethanolamines; D004871:Erbium; D013932:Thulium; C026660:tellurous acid; D015018:Ytterbium; D013691:Tellurium