The impact of ligands on the synthesis and application of metal halide perovskite nanocrystals

Abstract

The surface ligation of metal halide perovskite nanocrystals (NC) influences the size/dimensionality, optoelectronic properties, chemical stability, and use of the NCs.

4‐Bromo‐Butyric Acid‐Assisted In Situ Passivation Strategy for Superstable All‐Inorganic Halide Perovskite CsPbX3 Quantum Dots in Polar Media

“…[19] Whereas the majority of BBA À are preferentially maintained on the surface of CPB QDs due to its relatively short chain structure, thus, resulting in the formation of a protective shell. [23][24][25][26] Those samples free of BBA or with only BBA quench completely as depicted in Figure 1a. Thereby, both BBA and OLA are jointly essential for the bright green luminescence of CPB QDs.…”

“…It is believed that significant bonding interactions exist between the edge ions on the crystal structures of CPB QDs and the functional groups in organic ligands. [25,26] The obtained CPB QDs have been investigated by TEM as depicted in Figure 2a. It is observed that the pure CPB QDs of � 10 nm with a square-shape are well crystallized and monodispersed due to the presence of H 2 O.…”

“…When the precursor is injected into water, most of OA − and OLA + are prone to be replaced by OH − and H 3 O + , respectively, because of the higher activities of OH − and H 3 O + as compared to OA − and OLA + [19] . Whereas the majority of BBA − are preferentially maintained on the surface of CPB QDs due to its relatively short chain structure, thus, resulting in the formation of a protective shell [23–26] …”

“…It could be concluded based on the data that the treatment with BBA and OLA in equal amounts allows for the luminescence intensity to stand out from the rest of the samples. It is believed that significant bonding interactions exist between the edge ions on the crystal structures of CPB QDs and the functional groups in organic ligands [25, 26] …”

Template Assembled Large‐Size CsPbBr3 Nanocomposite Films toward Flexible, Stable, and High‐Performance X‐Ray Scintillators

“…Alternatively, the ligand modification has been reported as an effective method to enhance the long‐term stability of CsPbBr 3 NCs. [ 34–38 ] Huang et al. reported that multiple ionic liquids enable to facilitate stable perovskites.…”