Utilizing Energy Transfer in Mn²⁺/Ho³⁺/Yb³⁺ Tri-doped ZnAl₂O₄ Nanophosphors for Tunable Luminescence and Highly Sensitive Visual Cryogenic Thermometry.

ABSTRACT: Lanthanide (Ln³⁺)-doped upconversion (UC) phosphors converting near-infrared (NIR) light to visible light hold very high promise toward biomedical applications. The scientific findings on luminescent thermometers revealed their superiority for noninvasive thermal sensing. However, only few reports showcase their potential for applications in extreme conditions (temperatures below -70 °C) restricted by low thermal sensitivity. Here, we demonstrate the tailoring of luminescence properties via introducing Ho³⁺-Mn²⁺ energy transfer (ET) routes with judicious codoping of Mn²⁺ ions in ZnAl₂O₄/Ho³⁺,Yb³⁺ phosphor. Preferentially, a singular red UC emission is required to improve the bioimaging sensitivity and m

SUBMITTER: Balhara A 

PROVIDER: S-EPMC10448494 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature