PHOTON UPCONVERSION

Nanocrystals feel the heat

Phosphors often suffer luminescence quenching at elevated temperatures. Now, thermal quenching can be combated with surface phonon-assisted energy transfer, enabling the luminescence of ultrasmall upconversion nanophosphors to be dramatically enhanced.

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Fig. 1: Schematic of surface phonon-assisted upconversion on heating.

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Correspondence to Xiaogang Liu.

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Liang, L., Liu, X. Nanocrystals feel the heat. Nature Photon 12, 124–125 (2018). https://doi.org/10.1038/s41566-018-0117-4

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