Direct cation exchange of surface ligand capped upconversion nanocrystals to produce strong luminescence

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Journal Article
Chemical Communications, 2018, 54 (69), pp. 9587 - 9590
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© 2018 The Royal Society of Chemistry. We develop a facile and rapid cation exchange method for upconversion nanocrystals (UCNCs) without removing surface ligands. It avoids the tedious pretreatment of as-synthesized UCNCs, and the luminescent intensities of nanocrystals after Tb 3+ exchange using the new method are much stronger than those of the nanocrystals obtained using conventional cation exchange in water.
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