Journal
PHYSICAL REVIEW B
Volume 84, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.165328
Keywords
-
Funding
- UK Engineering and Physical Sciences Research Council
Ask authors/readers for more resources
We present a study of CdTe/CdSe and CdSe/CdTe type-II core-shell nanocrystals using a (2,6)-band effective mass approximation for quantum-dot heterostructures and map the exciton properties as a function of core radius and shell thickness. The Coulomb interaction (including the effects of dielectric mismatch) is calculated in first-order perturbation theory, and optical absorption wavelengths of the two structures are compared. We find that the (2,6)-band theory allows us to identify higher exciton states in absorption data for CdTe/CdSe which a single-band theory does not, thereby demonstrating the importance of an accurate description of the nanocrystal valence band structure. Excitation probabilities are significantly lower and the number of allowed transitions greater in the (2,6)-band theory due to s-d mixing in the hole wave functions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available