Abstract
Progress 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 special characteristics of single CdSe-dot-in-CdS-rod nanocrystals. These exhibit blinking due to charging/discharging, as well as tap-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.
Original language | English |
---|---|
Pages (from-to) | 4884-4892 |
Number of pages | 9 |
Journal | Nano Letters |
Volume | 13 |
Issue number | 10 |
DOIs | |
Publication status | Published - Oct 2013 |
Funding
This work is part of the research program of the "Stichting voor Fundamenteel Onderzoek der Materie (FOM)", which is financially supported by the "Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)". P.L. gratefully acknowledges the Carlsberg Foundation for financial support. A.F.K. gratefully acknowledges an NWO-Vidi grant for financial support.
Keywords
- Nanocrystal
- colloidal quantum dot
- nanorod
- blinking
- trion
- Auger recombination
- NANOCRYSTAL QUANTUM DOTS
- CORE-SHELL NANOCRYSTALS
- SEMICONDUCTOR NANOCRYSTALS
- COLLOIDAL NANOCRYSTALS
- FLUORESCENCE INTERMITTENCY
- PHOTOLUMINESCENCE SPECTROSCOPY
- SUPPRESSED BLINKING
- SEEDED GROWTH
- DECAY
- HETERONANOCRYSTALS