Abstract
We have spectrally resolved the intraband transient absorption of photogenerated excitons to quantify the exciton population dynamics in colloidal PbSe quantum dots (QDs). These measurements demonstrate that the spectral distribution, as well as the amplitude, of the transient spectrum depends on the number of excitons excited in a QD. To accurately quantify the average number of excitons per QD, the transient spectrum must be spectrally integrated. With spectral integration, we observe efficient multiple exciton generation In colloidal PbSe QDs.
Original language | English |
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Pages (from-to) | 1217-1222 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 9 |
Issue number | 3 |
DOIs | |
State | Published - 11 Mar 2009 |
Externally published | Yes |
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanical Engineering