Abstract
We report on the quantum-confined Stark effect for spatially indirect transitions in Stranski-Krastanov grown type-II quantum dots. A linear blueshift of the spatially indirect transition is observed at increasing electric field in contrast to the commonly observed redshift for type-I transitions. A shift of the emission-peak position and different quenching rates of the photoluminescence for and diodes at increased electric field and temperature indicate a deeper notch potential for electrons above the dot than below due to a strain-induced asymmetry in the band alignment.
- Received 4 November 2004
- Publisher error corrected 8 March 2005
DOI:https://doi.org/10.1103/PhysRevB.71.113301
©2005 American Physical Society
Corrections
8 March 2005