GUO Zi-xuan, ZHAO Shi-long, HUANG Li-hui etc. Influence of Zr<sup>4+</sup> Doping Impurity on Crystal Phase and Upconversion Luminescence of Er<sup>3+</sup>/Yb<sup>3+</sup> Codoped NaYF<sub>4</sub> Microcrystals[J]. Chinese Journal of Luminescence, 2014,35(5): 565-570
GUO Zi-xuan, ZHAO Shi-long, HUANG Li-hui etc. Influence of Zr<sup>4+</sup> Doping Impurity on Crystal Phase and Upconversion Luminescence of Er<sup>3+</sup>/Yb<sup>3+</sup> Codoped NaYF<sub>4</sub> Microcrystals[J]. Chinese Journal of Luminescence, 2014,35(5): 565-570 DOI: 10.3788/fgxb20143505.0565.
Influence of Zr4+ Doping Impurity on Crystal Phase and Upconversion Luminescence of Er3+/Yb3+ Codoped NaYF4 Microcrystals
a facile hydrothermal approach assisted with oleic acid. The cubic-to-hexagonal phase transition and enhancement of up-conversion luminescence of Er
3+
ions were simultaneously achieved by the gradual addition of Zr
4+
ions in the reaction system. X-ray diffraction and SEM results indicated that the introduction of Zr
4+
ions could remarkably accelerate the cubic-to-hexagonal phase transition process and pure hexagonal NaYF
4
microcrystals were obtained
when Zr
4+
mole fraction reached 5%. Strong green and red up-conversion luminescence of Er
3+
ions was observed and the up-conversion intensity increased gradually with the addition of Zr
4+
ions.
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references
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