TMSI–TOP: a dual-function precursor for anion exchange and surface passivation via phosphonium iodide formation in CsPb(Br/I) 3 perovskite nanocrystals

Puntos clave

• This research aims to explore a dual-function precursor for enhancing stability and performance in perovskite nanocrystals.
• Synthesis of TMSI–TOP precursor
• Formation of phosphonium iodide
• Defect passivation with TMSOH
• Evaluation of LEDs' external quantum efficiency
• Stable red CsPb(Br/I)3 nanocrystals achieved
• External quantum efficiency of 21.69% recorded at 669 nm
• LEDs demonstrated verified reliability.