Radiative Recombination of Charged Excitons and Multiexcitons in CdSe Quantum Dots

Journal Article · Fri Dec 31 23:00:00 EST 2004 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2150583· OSTI ID:978112

Troparevsky, M Claudia ^[1]; Franceschetti, Alberto G ^[1]

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1. ORNL

We report semi-empirical pseudopotential calculations of emission spectra of charged excitons and biexcitons in CdSe nanocrystals. We find that the main emission peak of charged multiexcitons - originating from the recombination of an electron in an s-like state with a hole in an s-like state - is blueshifted with respect to the neutral monoexciton. In the case of the negatively charged biexciton, we observe additional emission peaks of lower intensity at higher energy, which we attribute to the recombination of an electron in a p state with a hole in a p state.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 978112
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 87; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRONS
EMISSION SPECTRA
EXCITONS
P STATES
QUANTUM DOTS
RECOMBINATION