Continuous-wave pumping of multiexciton bands in the photoluminescence spectrum of a single CdTe-CdSe core-shell colloidal quantum dot.
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.
Osovsky
Ruth
R
Schulich Faculty of Chemistry, Russell Berrie Nanotechnology Institute, Technion, Haifa 32000, Israel.
Cheskis
Dima
D
Kloper
Viki
V
Sashchiuk
Aldona
A
Kroner
Martin
M
Lifshitz
Efrat
E