Continuous-wave pumping of multiexciton bands in the photoluminescence spectrum of a single CdTe-CdSe core-shell colloidal quantum dot.

Authors:
Dr Dima Cheskis, PhD
Dr Dima Cheskis, PhD
Ariel University
Lecturer
Ariel, Israel | Israel

Phys Rev Lett 2009 May 14;102(19):197401. Epub 2009 May 14.

Schulich Faculty of Chemistry, Russell Berrie Nanotechnology Institute, Technion, Haifa 32000, Israel.

Single-exciton, biexciton, triexciton, and quadraexciton bands were resolved in the microphotoluminescence spectrum of a single CdTe/CdSe core-shell colloidal quantum dot, revealing nearly blinking-free behavior. Multiexcitons were generated by a sequential filling of electronic shells with the increase of a continuous-wave excitation power, and their probability was evaluated under steady-state conditions. A partial carriers' delocalization was determined at the core-shell interface, and an exciton binding energy was estimated by a second-order perturbation theory.

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http://dx.doi.org/10.1103/PhysRevLett.102.197401DOI Listing
May 2009
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References

(Supplied by CrossRef)

L. Banyai et al.
1993

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