Persistent Luminescence Ratiometric Thermometry at the Nanoscale (Advanced Optical Materials 30/2025)

A PersL-Based Nanothermometer A persistent luminescence (PersL)-based nanothermometer is developed, characterized by a core-shell nanostructure of NaYF4:Er3+@NaYF4 with an average size of ∼16.5 nm. It exhibits hour-long green PersL upon X-ray charging. At the PersL stage, the intensity ratio of 2H11/2→4I15/2 to 4S3/2→4I15/2 transitions of Er3+ can be used to monitor temperature changes, thus holding significant potential for diverse applications, such as intracellular temperature sensing. More details can be found in the Research Article by Leipeng Li, Feng Wang, and co-workers (DOI: 10.1002/adom.202502186).