Machine-Learning-Assisted Discovery of Cr³⁺-Based Near-Infrared Phosphors.

ABSTRACT: Cr³⁺-substituted inorganic phosphors exhibit three distinct near-infrared (NIR) photoluminescence emission peak shapes that typically fall between 650 and 950 nm. The exact position and shape are governed by the (weak, intermediate, or strong) crystal field splitting environment of the octahedrally coordinated Cr³⁺ ions. These emission characteristics are commonly quantified by the Dq/B ratio, where Dq represents the crystal field splitting parameter and B is the Racah parameter. Precise knowledge of this ratio is therefore critical for designing Cr³⁺-based NIR phosphors for applications like biomedical imaging, night vision, food quality analysis, and luminescence thermometry. Unfortunately, targeting specific Dq/B values in the solid

SUBMITTER: Kumar A 

PROVIDER: S-EPMC12529912 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature