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| A simple molten salts route has been developed to prepare the high-quality LaF3:Eu nanoplates with different doping levels (10%, 20% and 30%), and the sizes of products could be adjusted by simply changing the molar ratio of NH4F to Ln(NO3)¬3. With this molar ratio increasing, the size of as-prepared nanocrystals decreased clearly. The possible mechanism of the reaction in molten salts was discussed, and the reason that the molar ratio of the precursors influenced the particle size of nanocrystals was assumed based on the theory of LaMer. At the same time, the fluorescent properties of all the samples were studied at room temperature. The intensity of 5D0→7F0 and 5D0→7F1 varied with different Eu doping levels, and the relative intensity ratios of 5D0→7F2 to 5D0→7F1 transition (I610/I590) increased as the particle size of nanocrysts decreased. |
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| Keywords:Molten salt method, LaF3:Eu3+ nanoplates, Fluorescent properties |
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