Structure and up-conversion luminescence in sol–gel derived Er3+–Yb3+ co-doped SiO2:PbF2 nano-glass–ceramics

✍ Scribed by J. del-Castillo; A.C. Yanes; J. Méndez-Ramos; V.K. Tikhomirov; V.D. Rodríguez

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 639 KB
• Volume: 32
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2009.06.013

✦ Synopsis

Transparent oxyfluoride nano-glass-ceramics 90(SiO 2 )10(PbF 2 ) co-doped with 0.3 Yb 3+ and 0.1 Er 3+ (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 b-PbF 2 nanocrystals of certain diameter in nano-glass-ceramics varying from 10 to 20 nm depending on heat treatment conditions. The incorporation of Yb 3+ and Er 3+ 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.