Send to

Choose Destination
ACS Nano. 2012 Oct 23;6(10):8913-21. doi: 10.1021/nn3029106. Epub 2012 Sep 21.

Anomalous size-dependent decay of low-energy luminescence from PbS quantum dots in colloidal solution.

Author information

National Research University of Informational Technologies, Mechanics and Optics, 197101 Saint Petersburg, Russia.


We report on an anomalous size dependence of the room-temperature photoluminescence decay time from the lowest-energy state of PbS quantum dots in colloidal solution, which was found using the transient luminescence spectroscopy. The observed 10-fold reduction in the decay time (from ~2.5 to 0.25 μs) with the increase in the quantum dots' diameter is explained by the existence of phonon-induced transitions between the in-gap state-whose energy drastically depends on the diameter-and the fundamental state of the quantum dots.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center