Addition energies and quasiparticle gap of CdSe nanocrystals

Using atomistic pseudopotential wave functions we calculate the quasipartic le gap, the optical gap and the electron and hole addition energies of CdSe nanocrystals. We find that the quasiparticle gap and the addition energies depend strongly on the dielectric constant of the surrounding material, wh ile the optical gap is rather insensitive to the environment. We provide sc aling lows for these quantities as a function of the quantum dot size, and compare our results with recent scanning tunneling spectroscopy experiments . (C) 2000 American Institute of Physics. [S0003-6951(00)02413-X].