Photoluminescence enhancement of perovskites nanocomposites using ion implanted silver nanoparticles

Metal-enhanced photoluminescence by 70 keV Ag ions implanted at various fluences in quartz substrates was studied using drop casted CsPbX (X = Br₃, I₃, BrI₂) perovskites. The concentration and depth profile of the implanted Ag were determined by Rutherford Backscattering Spectrometry. Ag nanoparticle’s existence was confirmed by optical absorption spectroscopy. Photoluminescence enhancement was obtained using steady-state photoluminescence spectroscopy and enhancement was observed for CsPbBrI₂ and CsPbI₃ reaching as high as 3.6 and 5.9-fold, respectively. Whereas, a 60% photoluminescence quenching was observed for CsPbBr_3, which could be attributed to the non-radiative energy transfer from perovskite to nanoparticles.