A New Approach to the Synthesis of Lead Sulfide Colloidal Quantum Dots in a Mixture of Oleylamine and Oleic Acid

Oleic acid/oleylamine ligand pair: a versatile combination in the synthesis of colloidal nanoparticles

“…The spectral features of PbS QDs as a function of temperature, reaction time and Pb/S ratio were studied by Razumov and co-workers. 215 Zhao et al produced PbS QDs in the presence of ligands such as OAm, OAc and TOP. It was found that the amphiphilic polymer approach, using PMAO-PEG, could transfer the particles to water without losing their initial structure and photostability when OAc or OAc/TOP were the starting ligands.…”

Surface ligand chemistry on quaternary Ag(InxGa1−x)S2 semiconductor quantum dots for improving photoluminescence properties

“…Both types of ligands have the ability to remove surface trap states and enhance the PL intensity of the QDs, 32,33 and they have occasionally been utilized as a ligand (solvent) mixture with the aim of combining their properties. 34,35 Surface ligands can be classied into L-, X-, and Z-types according to the number of electrons that the ligand provides in its neutral state. 36 OLA is a typical L-type ligand, whereas OA presents features of both the L-and X-types and occasionally takes h 2 coordination providing a stronger binding to the QD surface.…”

Lead Chalcogenide Colloidal Quantum Dots for Infrared Photodetectors

“…Experimental results showed that 78% of the original oleic acid-terminated CQD photoluminescence quantum efficiency could be maintained after ligand exchange in PbS CQDs by Pb-thiolate. To further study the influence of reaction conditions on PbS CQDs, in 2020, Shuklov et al proposed a method to synthesize 1.7-2.05 µm PbS CQDs through a mixture of oleic acid and oleylamine [61]. The experimental study showed that the reaction temperature could significantly affect the size of PbS CQDs, while the reaction time had little effect on the PbS CQDs.…”