Aging of Self-Assembled Lead Halide Perovskite Nanocrystal Superlattices : Effects on Photoluminescence and Energy Transfer
Excitonic coupling, electronic coupling, and cooperative interactions in self-assembled lead halide perovskite nanocrystals were reported to give rise to a red-shifted collective emission peak with accelerated dynamics. Here we report that similar spectroscopic features could appear as a result of the nanocrystal reactivity within the self-assembled superlattices. This is demonstrated by study