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A series of Ce 3+ -Yb 3+  ions codoped NaYF 4  nanocrystals were prepared by hydrothermal method. The structure, morphologies, photoluminescence properties and fluorescence dynamics were studied systemically. In Ce 3+ -Yb 3+  ions codoped NaYF 4  nanocrystals, strong near-infrared (NIR) emission at 900–1100 nm was observed under the excitation of 5d level of Ce 3+  ions. The lifetime of Ce 3+  ions decreased increases with increasing Yb 3+  ions concentration. The back energy transfer from Yb 3+  ions to Ce 3+  ions in NaYF 4  nanocrystals does not occur. As a near-infrared luminescent convertor, the kinds of materials have potential to be applied in luminescent solar concentrators (LSCs) and efficient NIR emitters.

Near-infrared quantum cutting in NaYF 4 :Ce 3+ ,Yb 3+ nanocrystals for luminescent solar concentrators