Multi-Wavelength Excitable Multicolor Upconversion and Ratiometric Luminescence Thermometry of Yb³⁺/Er³⁺ Co-Doped NaYGeO₄ Microcrystals.

ABSTRACT: Excitation wavelength controllable lanthanide upconversion allows for real-time manipulation of luminescent color in a composition-fixed material, which has been proven to be conducive to a variety of applications, such as optical anti-counterfeiting and information security. However, current available materials highly rely on the elaborate core-shell structure in order to ensure efficient excitation-dependent energy transfer routes. Herein, multicolor upconversion luminescence in response to both near-infrared I and near-infrared II (NIR-I and NIR-II) excitations is realized in a novel but simple NaYGeO₄:Yb³⁺/Er³⁺ phosphor. The remarkably enhanced red emission ratio under 1532 nm excitation, compared with that under 980 nm excitation, could be attributed t

SUBMITTER: Zeng H 

PROVIDER: S-EPMC11510309 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature