The influence of silver ion exchange on the formation and luminescent properties of lead sulfide molecular clusters and quantum dots

Impact of Molecular Ligands in the Synthesis and Transformation between Metal Halide Perovskite Quantum Dots and Magic Sized Clusters

“…Generally, two wet chemical methods have been used for the preparation of PQDs: hot injection (HI) − and ligand-assisted reprecipitation (LARP). , The HI approach relies on injection of a presynthesized precursor into an organic solvent containing another precursor ligands under high temperature (140–200 °C) and inert atmospheres, followed by quenching of the reaction with an ice bath. For example, HI was adopted to prepare CsPbX 3 PQDs by Protesescu et al in 2015 for the first time .…”

“…For example, HI was adopted to prepare CsPbX 3 PQDs by Protesescu et al in 2015 for the first time . This method generally produces well-defined colloidal PQDs, which enables control over size and stability via controlling reaction temperature and halide elements. − The LARP approach relies on the spontaneous crystallization of the material when it reaches a supersaturated state, which is carried out in the presence of capping ligands, and the nucleation and growth of the precipitate can be controlled. For instance, Zhang et al employed the LARP approach to synthesize luminescent colloidal MAPbBr 3 PQDs for the first time .…”