Trap Depth Distribution Determines Afterglow Kinetics: A Local Model Applied to ZnGa₂O₄:Cr³.

ABSTRACT: Persistent luminescence materials have applications in diverse fields such as smart signaling, anticounterfeiting, and in vivo imaging. However, the lack of a thorough understanding of the precise mechanisms that govern persistent luminescence makes it difficult to develop ways to optimize it. Here we present an accurate model to describe the various processes that determine persistent luminescence in ZnGa₂O₄:Cr³⁺, a workhorse material in the field. A set of rate equations has been solved, and a global fit to both charge/discharge and thermoluminescence measurements has been performed. Our results establish a direct link between trap depth distribution and afterglow kinetics and shed light on the main challenges associated with persistent luminescence in Zn

SUBMITTER: Romero M 

PROVIDER: S-EPMC11382276 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature