Enhancing the stability and photoluminescence of CsPbBr3 nanocrystals through Au nanoparticle integration

Abstract

The meticulous design of the interaction between semiconductors and metals can significantly enhance the performance and stability of nano-luminescent materials, thereby expanding their broad application prospects. In this investigative endeavor, we have innovated a novel synthesis methodology that seamlessly integrates inorganic CsPbBr₃ perovskite nanocrystals (NCs) with gold nanoparticles (Au NPs). Photoluminescence analysis revealed that the emission intensity of the resultant Au-CsPbBr₃ hybrid NCs surpassed that of pristine CsPbBr₃ NCs. This enhancement was primarily ascribed to the localized surface plasmon resonance (LSPR) exhibited by the Au NPs. Furthermore, the Au-CsPbBr₃ hybrid NCs demonstrated remarkable stability, maintaining their excellent fluorescence properties even after exposure to natural environmental conditions for an extended duration. This simple and effective method of fabricating Au-CsPbBr₃ hybrid NCs offers exciting new avenues for optimizing optical properties and expanding the use of perovskite NCs in light-emitting diodes as well as a range of other optoelectronic devices.