Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629290 | Journal of the European Ceramic Society | 2016 | 5 Pages |
Abstract
A novel glassy nanocomposite containing Er3+-doped BaCl2 nanocrystals of about tens of nm embedded in a silicate matrix has been prepared by using sol-gel route followed by controlled crystallization of the xerogel. Under 810 nm laser light pumping it shows green ((2H11/2, 4S3/2) â 4I15/2) and red (4F9/2 â 4I15/2) up-conversion luminescences ascribed by a two-photon processes. The luminescence signal recorded in the oxychloride nano-glass ceramic is only about 10% compared to the NaYF4:Er3+ (18%). In the nano-glass ceramic there are effective non-radiative decay channels, most probably related to hydroxyl ions and surface defects acting as centers for the non-radiatively energy dissipation.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
M. Secu, C.E. Secu,