Here we investigated how the alkylammonium length influences the optical and physical properties of organic-inorganic perovskite nanoparticles (NPs). The NPs were synthesized under ambient atmosphere. This synthesis led to the formation of luminescent, well-defined, cubic organic-inorganic perovskite NPs using different lengths of alkylammonium molecules. The optical and physical characterizations showed that when the alkylammonium length is increased, the size of the NPs increases as well. Both the experimental and computational results indicate that the length of the alkylammonium ligand regulates the dominance of the van der Waals interactions between the hydrocarbons at the surface of the NPs. These findings highlight the importance of studying the surface chemistry of hybrid organic-inorganic perovskite NPs, which will facilitate their implementation in optoelectronic applications.
Bibliographical noteFunding Information:
The authors would like to thank the Israel ministry of Science under a China−Israel grant for financial support. Calculations were performed in the Cyfronet Computer Centre using the Prometheus computer. This work has been also supported by The National Science Centre of Poland (Project No. 2016/23/ B/ST8/03480)
© 2018 American Chemical Society.