Ultrafast electron-hole dynamics in core/shell CdSe/CdS dot/rod nanocrystals.
We investigated the transient bleaching and absorption of the asymmetric core/shell CdSe/CdS nanorods using the pump-probe technique. We observed ultrafast carrier relaxation and identified hole localization dynamics with 650 +/- 80 fs time constant. Upon pumping the CdSe core, we found an intense bleaching signal in the CdS spectral region, which we assigned to the delocalization of the electronic wave function on the basis of envelope-function theoretical calculations.
Lupo
Maria Grazia
MG
IIT-Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.
Della Sala
Fabio
F
Carbone
Luigi
L
Zavelani-Rossi
Margherita
M
Fiore
Angela
A
Lüer
Larry
L
Polli
Dario
D
Cingolani
Roberto
R
Manna
Liberato
L
Lanzani
Guglielmo
G