Shape-controlled synthesis of one-dimensional cesium lead halide perovskite nanocrystals: methods and advances

Abstract

Metal halide perovskite nanocrystals (MHP NCs) are an emerging nanosemiconductor material that has attracted widespread attention in recent years due to their advanced optical preparties. One-dimensional (1D) CsPbX3 (X =...

Influence of Binary Ligands in Designing Cesium Lead Halide (CsPbX3, X = Cl, Br, I) Perovskite Nanocrystals-Oleic Acid and Oleylamine

“…Here, along with the partial removal of ligands, the strong dipolar interaction of nanocubes leads to the formation of NWs. Similar to these investigations, there are different studies elucidating the role of solvents and ligands in the self-assembly of Cs LHP NCs [102][103][104][105][106]. Because of polarity, alcohols play an important role in the formation of super-lattice nanostructures of Cs LHP NCs.…”

Exogenous Metal Cations in the Synthesis of CsPbBr3 Nanocrystals and Their Interplay with Tertiary Amines

“…Colloidal lead halide perovskite nanocrystals (NCs), with the general formula APbX 3 (A being a large monovalent cation and X being Cl, Br, or I), have been investigated extensively since their first synthesis reports. , This is due to their excellent optical properties, including high photoluminescence (PL) quantum yield (QY), narrow PL line width, and tunable PL emission/optical band gap. The latter can be adjusted by varying the halide and/or A-cation composition and the NC size. − To further modulate their optical properties, considerable efforts have also been devoted to controlling the shape of these NCs, resulting in platelets, wires, multipods, and various types of polyhedra. − In this context, we specifically discuss CsPbBr 3 NCs as the main representatives of this field. Colloidal CsPbBr 3 NCs are typically synthesized using a hot-injection strategy that involves carboxylic acids (e.g., oleic acid), alkylamines (e.g., oleylamine), high-boiling solvents (e.g., octadecene, hexadecane, or diphenyl ether), Cs + and Pb 2+ salts, and a source of bromide ions. ,, Alkylamines, although commonly employed, are not essential for the synthesis, and monodisperse CsPbBr 3 cubes can also be prepared using oleic acid alone or in combination with a phosphine oxide, as shown by some of us in previous works. , In such cases, the NC surface is exclusively terminated by Cs-oleate species …”