| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1495071 | Optical Materials | 2012 | 4 Pages |
Praseodymium-doped fluorogermanate 60PbGeO3–20PbF2–20CdF2 nano-structured phosphors were synthesized by thermal treatment of precursor glasses. Luminescence features of praseodymium ions incorporated into low-phonon-energy PbF2 nanocrystals dispersed in the fluorogermanate glass matrix was evaluated. The luminescence spectra exhibited visible emission signals peaked at 490, 525, 613, and 643 nm. White-light emission was observed in praeodymium single-doped phosphor excited using a LED at 460 nm. The dependence of the luminescence emission intensity upon annealing temperature, and rare-earth concentration was also evaluated. The results indicated the existence of optimum annealing temperature and activator ion concentration to obtain intense emission light with CIE 1931 chromaticity coordinates within the white-light boundary region. Results suggest that the novel nanocomposite glass material herein reported is a promising phosphor for white-light LED applications.
► White-light emission in a single-doped phosphor employing blue–green LED excitation. ► Luminescent features of praseodymium ions in nanocrystals dispersed in fluorogermanate glass. ► New nanocomposite phosphor host for white-light LED applications.
