Open AccessUltraviolet light induced white light emission in Ag and Eu^3+ co-doped oxyfluoride glasses
Author(s) -
Hai Guo,
Xiaofeng Wang,
Jindeng Chen,
Fang Li
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.018900
Subject(s) - materials science , phosphor , luminescence , doping , emission spectrum , visible spectrum , white light , ultraviolet , absorption spectroscopy , optics , absorption (acoustics) , quenching (fluorescence) , optoelectronics , broad band , analytical chemistry (journal) , fluorescence , spectral line , chemistry , physics , chromatography , astronomy , composite material
Transparent Ag and Eu(3+) co-doped oxyfluoride glasses with composition 50SiO(2)-20Al(2)O(3)-30CaF(2) were prepared by melt-quenching technique. The structural and luminescent properties of glasses, energy transfer mechanism between luminescent centers were systematically investigated. The missing nanoparticles signals in absorption spectra, XRD patterns and TEM images, the additional broad excitation band at 325-375 nm indicate that the broad emission band at 400-700 nm is originated from very small molecule-like, non-plasmonic Ag particles (ML-Ag-particles). A perfect white light emission was realized by combining intense red emission of Eu(3+) with broad band emission of ML-Ag-particles. These results suggest that Ag and Eu(3+) co-doped oxyfluoride glasses could be potentially applied as white light-emitting phosphors for ultra-violet LED chips.