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To investigate the effect of Yb3+ doping on the up-conversion emissions, the Yb3+/Er3+ co-doped (K,Na)NbO3 smart ferroelectric ceramics have been synthesized by the conventional solid-state reaction. The results here illustrated that the green and red up-conversion emission intensities of these ceramics excited under 980nm increased with the increasing content of Yb2O3 and achieved the maximum value...
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