  CdSe nanoplatelets show perfectly quantized thicknesses of few monolayers.
They present a situation of extreme, yet well defined quantum confinement. Due
to large dielectric contrast between the semiconductor and its ligand
environment, interaction between carriers and their dielectric images strongly
renormalize bare single particle states. We discuss the electronic properties
of this original system in an advanced tight-binding model, and show that
Coulomb interactions, including self-energy corrections and enhanced
electron-hole interaction, lead to exciton binding energies up to several
hundred meVs.

Materials Science