The effect of alkaline earth metallic ions on the photoluminescence properties of sol-gel silica glass

• Published in: Applied physics. A, Materials science & processing Vol. 74; no. 5; pp. 689 - 692
• Main Authors: YANG, P, SONG, C. F, LÜ, M. K, ZHOU, G. J, XU, D, YUAN, D. R
• Format: Journal Article
• Language: English
• Published: Berlin Springer 01.05.2002
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Earth; Exact sciences and technology; Fluorescence; Impurities; Magnesium; Moles; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other nonmetallic inorganics; Other nonmetals; Other solid inorganic materials; Photoluminescence; Physics; Silica glass; Sol gel process; Strontium; Visible and ultraviolet spectra; Impurities; Doping; Ultraviolet spectra; Visible spectra; Glass; Fluorescence; Absorption spectra; Experimental study; Silica
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s003390100938

Mg-, Ca-, Sr- and Ba-doped silica glasses have been prepared using sol-gel processing by employing Si(OC2H5)4, MgCl26H2O, CaCl22H2O, SrCl26H2O and BaCl22H2O as precursors, with HCl as a catalyst. The UV--visibleabsorption spectra of the doped samples are almost the same as those of the undoped sample. The absorption bands of alkaline earth metallic ions have not been observed in the doped samples. Strong visible light has been observed from sol- gel silica glasses doped with alkaline earth metallic ions. The relative fluorescence intensity of the Sr-doped (the impurity mole ratio of Sr was 0.268%) and the Ba-doped (the impurity mole ratio of Ba was 0.448%) samples was about 4 times that of the undoped sample. The relative fluorescence intensity of the Mg-doped (the impurity mole ratio of Mg was 0.069%) sample was about 2.5 times that of the pure glass sample. The relative fluorescence intensity of the Ca- doped (the impurity mole ratio of Ca was 0.179%) sample was about 3 times that of the pure glass sample. Alkaline earth metallic ions affect the formation and conversion of luminescent defects in sol-gel silica glass. Thus, the relative fluorescence intensity of the doped samples increases more than that of the undoped sample.