Valence and Site Engineering Enable Efficient Broadband Near-Infrared Emission at 960 nm in Cr³⁺-Activated Forsterite.

ABSTRACT: Near-infrared (NIR) light sources hold great potential for applications in night vision illumination, bio-imaging, and non-destructive testing. However, radiationless de-activation and low absorption restrict the development of high-efficiency blue light excitable NIR phosphors, especially for emissions beyond 900 nm. Herein we report a high-performance Cr³⁺-activated forsterite (Mg₂SiO₄:1.5%Cr³⁺, 5%Li⁺) phosphor exhibiting broadband NIR emission peaking at 960 nm with a record external quantum efficiency (EQE) up to 48%. The introduction of Li⁺ as a charge compensator and symmetry distorter not only suppresses Cr⁴⁺ formation but also enhances the cross section of Cr³⁺ d-d forbidden transitions in Mg

SUBMITTER: Zhong L 

PROVIDER: S-EPMC12506601 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature