基于长石结构设计高热稳定性BaGa2Si2O8∶Cr3+宽带近红外荧光粉OA

NIR phosphor-converted LEDs(pc-LEDs),as a new type of portable near-infrared light source,are widely used in fields such as night vision,plant growth,and medical diagnostics.Their performance largely depends on the characteristics of the developed near-infrared phosphors.However,currently reported near-infrared phosphors generally face challenges of narrow bandwidth and insufficient thermal stability,which significantly limits the perfor-mance improvement of NIR pc-LEDs and their broader practical application.To address the urgent need for high ther-mal stability and broad emission bandwidth in high-performance near-infrared light sources,this study designed and synthesized a novel BaGa2Si2O8∶Cr3+near-infrared phosphor based on Cr3+-Cr3+ion pairs.This phosphor can be effec-tively excited by 450 nm blue light,producing a broadband near-infrared emission(650-1 000 nm)with a full width at half maximum(FWHM)of 134 nm.It exhibits excellent thermal stability,retaining 83.67％of its initial lumines-cence intensity even at a high temperature of 423 K,outperforming most similar materials.The fabricated NIR pc-LED device based on this phosphor demonstrates potential for applications in night vision and bioimaging,confirming the significant potential of feldspar-type structure materials in developing high-performance near-infrared phosphors.