Abstract
The effects of electron-hole interaction on the exciton energy of semiconductor quantum dots are calculated using pseudopotential wave functions. A comparison with the widely used, but never tested, effective-mass approximation (EMA) shows that the electron-hole Coulomb energy is significantly ( ) overestimated by the EMA, and that the scaling with the dot size is sublinear in . The exchange splitting is much smaller than the Coulomb energy, and in the case of CdSe quantum dots shows significant deviations from the scaling predicted by the EMA.
- Received 23 August 1996
DOI:https://doi.org/10.1103/PhysRevLett.78.915
©1997 American Physical Society