Broadband NIR luminescence of Bi-doped Li2O-Al2O3-SiO2 glass-ceramics
- Resource Type
- Article
- Authors
- Dai, Nengli; Luan, Huaixun; Liu, Zijun; Sheng, Yubang; Peng, Jinggang; Jiang, Zuowen; Li, Haiqing; Yang, Luyun; Li, Jinyan
- Source
- Journal of Non-Crystalline Solids. Nov2012, Vol. 358 Issue 22, p2970-2973. 4p.
- Subject
- *NEAR infrared spectroscopy
*LUMINESCENCE
*DOPED semiconductors
*BISMUTH compounds
*SILICON oxide
*GLASS-ceramics
*NUCLEATION
*CRYSTALLIZATION
- Language
- ISSN
- 0022-3093
Abstract: Transparent Bi-doped Li2O-Al2O3-SiO2 (LAS) glass-ceramics are prepared by controlled nucleation and crystallization of glasses with TiO2 worked as nucleating agents. The presence of β-eucryptite (LiAlSiO4) crystalline phase can be indicated by X-ray diffraction analyses. Enhanced near infrared luminescence in the range of 1000~1550nm with FWHM over 270nm is observed from Bi-doped LiAlSiO4 glass-ceramics compared with initial glass. Blue emission centered at 425nm in glass and glass-ceramics could be ascribed to the emission band of the Bi3+ ions (3P1–1S0). Based on optical basicity theory, the broad infrared luminescence from the Bi-doped LAS glass and glass-ceramics can be derived from low valence Bi ions. The possible mechanism of the enhancement of near infrared (NIR) fluorescence is also discussed in this manuscript. [Copyright &y& Elsevier]