Green-Emitting Lead-Free Cs4SnBr6 Zero-Dimensional Perovskite Nanocrystals with Improved Air Stability.

Rossella ChiaraYasemin O CiftciValentin I E QuelozMohammad Kahaj Khaja Nazeeruddin Giulia Grancini Lorenzo Malavasi

Published in: The journal of physical chemistry letters (2020)

We report the synthesis and characterization of nanocrystals of a novel fully inorganic lead-free zero-dimensional perovskite, Cs4SnBr6. Samples are made of crystals with an average size of ∼20 nm with green emission centered around 530 nm. Interestingly, both colloidal suspensions and thin films show an enhanced air stability with respect to that of any other previous tin-based nanocrystalline system, with emission persisting for tens of hours under laboratory air.

Keyphrases

room temperature
energy transfer
photodynamic therapy
ionic liquid
high efficiency
quantum dots
solar cells
solid state
fluorescent probe