Near infrared long-persistent phosphorescence in La_3Ga_5GeO_14:Cr^3+ phosphor
Authors:
- 8 September 2010
- journal article
- research article
- Published by Optica Publishing Group in Optics Express
- Vol. 18 (19) , 20215-20221
Abstract
Near infrared (NIR; 660−1300 nm) long-persistent phosphorescence from Cr3+ ions with persistence time of more than 1 hour was realized in La3Ga5GeO14:Cr3+ phosphor (with or without co-dopants such as Li+, Zn2+, Ca2+, Mg2+ and Dy3+). The NIR phosphorescence can be effectively achieved under UV illumination (~240−360 nm) but is barely achieved by blue light (~480 nm) irradiation, even though the blue light excitation are effective to the NIR fluorescence. The NIR phosphorescence mechanisms were discussed by measuring the irradiation energy dependence of the phosphorescence intensity.Keywords
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