In this paper, Jin demonstrated a general method to synthesize 2D perovskites of desired layer thickness through gradual transformation from low n-value to higher n-value by tuning the temperature or time of the crystallization.

It addresses the bottleneck of producing stable 2D halide perovskite with a
high quantum-well number (n=1-6). Also, this work indicates that kinetics control is of
fundamental importance in realizing phase purity in 2D perovskites. The kinetically controlled
transformation of 2D perovskites by tuning the temperature, time, and stoichiometry
demonstrates a new strategy to achieve higher n-values.

Supported by machine learning, Bin made a multiparameter phase diagram of
2D halide perovskites for Ruddlesden−Popper (RP) and Dion−Jacobson (DJ) phases.
This work indicates that kinetics control is of fundamental importance in realizing
phase purity in 2D perovskites.

Read here more: https://www.nature.com/articles/s44160-023-00422-3

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