Journey of Making Cesium Lead Halide Perovskite Nanocrystals: What's Next.

Understanding physical insights of making different lead halide perovskite nanocrystals remains in limelight of current research because of their strong emission that is tunable in the entire visible spectrum. Optimizing reaction parameters, intensifying the emission, modulating A, B, and X sites to bring optical and phase stability, understanding the interface and ligand chemistry, investigating the growth kinetics, tuning the dimension, making heterostructures, etc. were intensively studied. In addition, several aspects of colloidal nanocrystals such as time-dependent growth and obtaining size-tunable nanocrystals as a function of time from one reaction, controlling anisotropic growth or stabilizing other than the six facets of cubes, formation of various heterostructures with epitaxial growths, etc. could not be established largely. Hence, while the field is emerging among efficient optically active materials, addressing these issues by summarizing different directions of research became important. Under these prospects, this Perspective focuses on top developments in the field of synthesis modulations where success has been achieved and also summarizes several directions of research where physical insights still could not be understood broadly.