Abstract
Homogeneous Y2O3:Eu3+ nanorods with the lengths of several micrometres were successfully synthesised on a large scale by using a urea-assisted hydrothermal method and a post-calcining process. In this study, the influences of urea content and NaOH concentration on the oriented growth, photoluminescence (PL) and electroluminescence (EL) intensity enhancement of Y2O3:Eu3+ were investigated. As a precipitant for isotropic growth, urea can counteract the effect of NaOH on oriented growth along the c-axis during hydrothermal treatment. The Y2O3:Eu3+ powders exhibited a strong red emission centred at 613 nm under either 245 nm UV excitation or the direct current high electric field. The PL intensity of the Y2O3:Eu3+ phosphor prepared with 0.3 g of urea reached 141 % that of the sample prepared under the same conditions but without urea. The strategy for controlling the oriented growth, PL and EL enhancement of Y2O3:Eu3+ can be extended to the synthesis of other inorganic nano/micromaterials.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11174234, 51272215) and the National Key Scientific Program of China (under Project No. 2012CB921503).
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Chen, G., Qi, W., Li, Y. et al. Hydrothermal synthesis of Y2O3:Eu3+ nanorods and its growth mechanism and luminescence properties. J Mater Sci: Mater Electron 27, 5628–5634 (2016). https://doi.org/10.1007/s10854-016-4470-0
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DOI: https://doi.org/10.1007/s10854-016-4470-0