Abstract
The observed intermittent light emission from colloidal semiconductor nanocrystals has long been associated with Auger recombination assisted quenching. We test this view by observing transient emission dynamics of CdSe/CdS/ZnS semiconductor nanocrystals using time-resolved photon counting. The size and intensity dependence of the observed decay dynamics seem inconsistent with those expected from Auger processes. Rather, the data suggest that in the "off" state the quantum dot cycles in a three-step process: photoexcitation, rapid trapping, and subsequent slow nonradiative decay.
| Original language | English |
|---|---|
| Article number | 157404 |
| Journal | Physical review letters |
| Volume | 104 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - Apr 16 2010 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Rosen, S., Schwartz, O., & Oron, D. (2010). Transient fluorescence of the off state in blinking CdSe/CdS/ZnS semiconductor nanocrystals is not governed by auger recombination. Physical review letters, 104(15), [157404]. https://doi.org/10.1103/PhysRevLett.104.157404