Abstract
The 0.1 mol% Er3+ and 0–2 mol% Yb3+ codoped Al2O3 powders were prepared by the sol-gel method, and the phase structure, including only two crystalline types of doped Al2O3 phase, γ-(Al,Er,Yb)2O3 and θ-(Al,Er,Yb)2O3, was detected at the sintering temperature of 1000°C. The visible and near infrared emissions properties depended strongly on the Yb3+ codoping, and the corresponding maximal peak intensities centered at about 523, 545, 660 and 1533 nm were obtained respectively for the 0.1 mol% Er3+ and 0.5 mol% Yb3+ codoped Al2O3 powders, which were composed of θ-(Al,Er,Yb)2O3 and a small amount of γ-(Al,Er,Yb)2O3 phases. The two-photon absorption process was responsible for the visible up-conversion emissions, and the one-photon absorption process was involved in the near infrared emissions of the Er3+-Yb3+ codoped Al2O3 powders.
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Dong, B., Sun, M., Feng, Z. et al. Effects of Yb3+ codoping on visible and near infrared emissions of Er3+-Yb3+ codoped Al2O3 powders by the sol-gel method. Chin. Sci. Bull. 53, 1967–1971 (2008). https://doi.org/10.1007/s11434-008-0267-8
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DOI: https://doi.org/10.1007/s11434-008-0267-8