Defect compensation and intervalence charge transfer state-based Pr3+-doped niobate antithermal quenching phosphors

Abstract

Herein, a scheme of Sr²⁺/Ca²⁺ ion substitution was employed to simultaneously regulate the defect and intervalence charge transfer (IVCT) state of Sr_2−xCa_xNb₂O₇:Pr³⁺ phosphors, resulting in a dual-modulation strategy for enhancing phosphor thermal stability.