nl4027567_si_001.pdf (1.97 MB)
Reduced Auger Recombination in Single CdSe/CdS Nanorods by One-Dimensional Electron Delocalization
journal contribution
posted on 2013-10-09, 00:00 authored by Freddy
T. Rabouw, Per Lunnemann, Relinde J. A. van Dijk-Moes, Martin Frimmer, Francesca Pietra, A. Femius Koenderink, Daniël VanmaekelberghProgress to reduce nonradiative Auger
decay in colloidal nanocrystals
has recently been made by growing thick shells. However, the physics
of Auger suppression is not yet fully understood. Here, we examine
the dynamics and spectral characteristics of single CdSe-dot-in-CdS-rod
nanocrystals. These exhibit blinking due to charging/discharging,
as well as trap-related blinking. We show that one-dimensional electron
delocalization into the rod-shaped shell can be as effective as a
thick spherical shell at reducing Auger recombination of the negative
trion state.