Publication

Subpicosecond near-infrared fluorescence upconversion study of relaxation processes in PbSe quantum dots

Majed Chergui, Frank van Mourik, Andrea Cannizzo, Andreas Tortschanoff, Dino Tonti, Camilla Bonati
2007
Journal Articles

Abstract

The (sub)-ps relaxation processes in PbSe quantum dots of different sizes were measured by near-IR luminescence upconversion. The early-time spectra are characterized by emission from several low-lying excited states. The direct measurement of the Huang-Rhys factors of the lowest excited states excludes strong electron-phonon coupling in the intraband relaxation. The kinetics point to a fast sequential cascade process between excited states, governed by energy gaps and a quasicontinuous valence-band structure.

Official source

https://infoscience.epfl.ch/entities/publication/15e110c9-cad0-44f7-b60c-89ec835b90d7

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Subpicosecond near-infrared fluorescence upconversion study of relaxation processes in PbSe quantum dots

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