Abstract:
Quantum-confined CdTe nanoplatelets (NPL) are synthesized in colloidal solutions. The
formation, growth, and transformation of 2D NPLs are monitored using UV-visible absorption PL
spectroscopy and transmission electron microscopy. The luminescence intensity of NPL dependences
on the temperature and injection of precursors is shown. It is found that the luminescence spectra
shift to the long-wavelength region with increasing temperature due to an increase in the thickness
of the NPL. The dependence of the band gap on the thickness of the NPL is shown. The band
gap is determined by the thickness and number of layers. The dependence of the concentration of
precursors in the reaction mass and the kinetics of NPL growth are shown. The excitation of defect
states luminescence depends on the coordinating oleic ligand. The crystal structure of the CdTe NPL
was analyzed via the electron diffraction pattern (ED), which allows a comparative conclusion about
the crystal structure of the obtained NPL samples.
