|
|||||
|
|
Structure and up-conversion luminescence in sol–gel derived Er–Yb co-doped SiO2:PbF2 nano-glass–ceramics |
|
| Authors: | J del-Castillo AC Yanes J Mndez-Ramos VK Tikhomirov VD Rodríguez |
| Affiliation: | aDpto. Física Básica, Universidad de La Laguna, Tenerife, Spain;bDpto. Física Fundamental y Experimental, Electrónica y Sistemas, Universidad de La Laguna, Tenerife, Spain;cINPAC – Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Belgium |
| Abstract: | Transparent oxyfluoride nano-glass–ceramics 90(SiO2)10(PbF2) co-doped with 0.3 Yb3+ and 0.1 Er3+ (mol%) have been prepared by thermal treatment of precursor sol–gel glasses. X-ray diffraction and high resolution transmission electron microscopy analysis pointed out a precipitation of cubic β-PbF2 nanocrystals of certain diameter in nano-glass–ceramics varying from 10 to 20 nm depending on heat treatment conditions. The incorporation of Yb3+ and Er3+ dopants in these nanocrystals has been confirmed by signatures of luminescence spectroscopy. Up-conversion luminescence pumped at 980 nm has been detected. Colour tuneability of up-conversion luminescence varying pump power has been analyzed in terms of standard chromaticity diagram. This tuneability opens applications for up-conversion phosphors and three-dimensional optical recording. |
| Keywords: | Sol– gel technique Glass– ceramics Up-conversion luminescence Lead fluoride nanocrystals |
| 本文献已被 ScienceDirect 等数据库收录！ | |