Energy-splitting from persistent luminescence nanoparticles with trivalent Cr ions for ratiometric temperature sensing.

ABSTRACT: MgGa₂O₄ (MGO) with the spinel structure exhibits abundance defects and could achieve the modulation of emission by ion doping as persistent luminescence nanoparticles (PLNPs). Here, we introduced Cr³⁺ ions into MGO to achieve near-infrared (NIR) emission, and Pr³⁺ ions to tune the lattice environment for enhanced NIR emission. The optimal composite, MgGa₂O₄: 0.005Cr³⁺, 0.003Pr³⁺ (MGCP), achieved enhanced NIR emission at 709 nm under 222 nm excitation. The concentration quenching was observed due to electric dipole-quadrupole interaction at high Cr³⁺ and Pr³⁺ content. The afterglow mechanism was revealed, while the energy-splitting occurs from trivalent Cr³⁺ ions at 650 a

SUBMITTER: Zhao TQ 

PROVIDER: S-EPMC11360775 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature