Broadband infrared luminescence of Ni2+-doped silicate glass-ceramics containing lithium aluminate spinel nanocrystals

Transparent Ni2+-doped SiO2-Al2O3-Ga2O3-Li2O (LGAS) glass-ceramics embedding lithium aluminate spinel nanocrystals was prepared. After heat treatment, LiAl5O8 crystallite was precipitated in the glasses, and its size was about 3nm. It was confirmed from the absorption spectra that the ligand environ...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2011-03, Vol.357 (5), p.1426-1429
Main Authors: Deng, Degang, Ma, Hongping, Xu, Shiqing, Wang, Qian, Huang, Lihui, Zhao, Shilong, Wang, Huanping, Li, Chenxia
Format: Article
Language:English
Subjects:
Aluminates
Amorphous materials, glasses and other disordered solids
Broadband
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Glass
Glass ceramics
Lithium
Luminescence
Nanocrystals
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Photoluminescence
Physics
Silicon dioxide
Spinel
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Summary:Transparent Ni2+-doped SiO2-Al2O3-Ga2O3-Li2O (LGAS) glass-ceramics embedding lithium aluminate spinel nanocrystals was prepared. After heat treatment, LiAl5O8 crystallite was precipitated in the glasses, and its size was about 3nm. It was confirmed from the absorption spectra that the ligand environment of Ni2+ ions changed from the trigonal bi-pyramid fivefold sites in the as-made glass to the octahedral sites in the glass-ceramics. Upon excitation at 980nm, broadband infrared luminescence centered at around 1250nm with full width at half maximum (FWHM) more than 250nm was observed originating from the 3 T 2(3 F) a' 3 A 2(3 F) transition of Ni2+ in octahedral sites. The broadband near-infrared (NIR) emission from Ni2+-doped glass-ceramics can be as host materials for broadband optical amplifier. a-[ordm Transparent Ni2+-doped SiO2-Al2O3-Ga2O3-Li2O glass-ceramics embedding lithium aluminate spinel nanocrystals was prepared, after heart-treatment, LiAl5O8 crystallite was precipitated in the glasses, and its size was about 3 nm. a-[ordm Upon excitation at 980 nm, Broadband infrared luminescence centered at around 1250 nm with full width at half maximum more than 250 nm was observed.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2010.10.048