Enhanced NIR emission and thermal stability of La2MgSnO6:Mn4+,Ni2+via energy transfer

Abstract

Near-infrared (NIR) phosphor materials are increasingly being recognized for their diverse functional applications. In this study, we investigate the enhancement of NIR emission and thermal stability in La₂MgSnO₆:Mn⁴⁺,Ni²⁺ through energy transfer mechanisms. Our findings reveal that co-doping La₂MgSnO₆ with Mn⁴⁺ significantly enhances Ni²⁺ absorption in the blue light region, markedly increases the NIR emission intensity, and improves thermal quenching performance. The newly developed La₂MgSnO₆:Mn⁴⁺,Ni²⁺ phosphors, when incorporated into NIR phosphor-converted LEDs (pc-LEDs), demonstrate significant potential for applications in night vision, information encryption, and vein imaging. This research paves a new path for enhancing the luminescent properties of Ni²⁺ and advancing high-performance NIR phosphors.