CaGdF₅ based heterogeneous core@shell upconversion nanoparticles for sensitive temperature measurement.

ABSTRACT: Lanthanide-doped upconversion nanoparticles (UCNPs) have attracted great attention in temperature sensing because of their widespread thermal quenching effect (TQE), a phenomenon in which luminescence intensity decreases as the temperature increases. However, enhancing the TQE of activated ions without changing the dopants or the host is still challenging. Herein, Yb³⁺ and Er³⁺ codoped UCNPs in a cubic CaGdF₅ host were synthesized by a coprecipitation method for optical temperature sensing. Compared with the homogeneous shell (CaGdF₅), those heterogeneous (CaF₂) shelled UCNPs exhibited stronger upconversion luminescence (UCL) due to the significantly reduced multiphonon nonradiative relaxation. Further, we investigated the effects of h

SUBMITTER: Xie X 

PROVIDER: S-EPMC10012412 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature