Research on Ligand Properties of CdSe Quantum Dots

Abstract

The surface ligands not only provide quantum dots nanocrystals (QDs) colloidal stability and workability of QDs particles, but also play an important role in passivation of QDs surface defects and change of electron transport characteristics of QDs films. The quantum dots synthesized with different ligands differ greatly, and the properties of QDs synthesized using the same ligands under different reaction conditions are also different. Previous studies have shown that surface ligands can greatly improve the stability of quantum dots, but ignore the effect of surface ligands on the luminescent properties of quantum dots. The electrochemical properties of ligands around quantum dots have a great influence on their luminescent properties. In this paper, the application of ligands in QDs is briefly described, and the effect of ligands on the photoluminescence of CdSe was investigated experimentally.