Photoluminescence quenching of CsPbBr₃ perovskite nanocrystals assisted by ion implanted silver nanoparticles

In this work, we discussed the photoluminescence (PL) of CsPbBr₃ perovskite in the presence of ion implanted silver nanoparticles. Fixed ion beam energy (70 keV) and different ion beam fluences were used for silver nanoparticles synthesis. The change in the chemical composition, concentration and depth profile of ion implanted samples were analyzed by Rutherford Backscattering (RBS) analysis. The existence of silver nanoparticles in the implanted samples was studied using optical absorption spectroscopy. Both steady state and time resolved photoluminescence measurements were carried out to investigate the effect of silver nanoparticles on the photoluminescence of CsPbBr₃ perovskite. The PL quenching of CsPbBr₃ perovskite has been observed with the increased ion beam fluence and increased concentration of silver nanoparticles. The PL quenching was attributed to possible energy transfer from CsPbBr₃ to silver nanoparticles, which was evident by a decrease average lifetime of CsPbBr₃.​