Ultraviolet-radiation-induced structure and long-lasting phosphorescence in Sn2+–Cu2+ co-doped silicate glass
✍ Scribed by Jianbei Qiu; Akio Makishima
- Publisher
- Institute of Physics and National Institute of Materials Science
- Year
- 2003
- Tongue
- English
- Weight
- 124 KB
- Volume
- 4
- Category
- Article
- ISSN
- 1468-6996
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✦ Synopsis
We report the relaxation of ultraviolet-radiation-induced structure and long-lasting phosphorescence in Sn 2þ -Cu 2þ co-doped glass with composition of 70SiO 2 •20Na 2 O•10CaO•0.05CuO•0.05SnO in mol ration. After irradiation by an ultraviolet lamp ðl max ¼ 254 nmÞ with a power density if 5 mW/cm 2 for 30 min, a visible light peaking at 510 nm could be observed with the naked eyes in the dark after the removal of the activating light. Thermostimulated luminescence glow curves and electron-spin-resonance spectra were measured. We suggest that the long-lasting phosphorescence in the Sn 2þ -Cu 2þ co-doped glass samples resulted from the recombination of electrons and holes at shallow traps in the glass matrix that can be thermally released at room temperature.