Broadband NIR photostimulated luminescence nanoprobes based on CaS:Eu ²⁺ ,Sm ³⁺ nanocrystals

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Near-infrared (NIR) photostimulated luminescence (PSL) nanocrystals (NCs) have recently evoked considerable interest in the field of biomedicine, but are currently limited by the controlled synthesis of efficient PSL NCs. Herein, we report for the first time the controlled synthesis of CaS:Eu