Jump to main content
Jump to site search

Issue 27, 2018
Previous Article Next Article

Deciphering hot- and multi-exciton dynamics in core–shell QDs by 2D electronic spectroscopies

Author affiliations

Abstract

Although the harnessing of multiple and hot excitons is a prerequisite for many of the groundbreaking applications of semiconductor quantum dots (QDs), the characterization of their dynamics through conventional spectroscopic techniques is cumbersome. Here, we show how a careful analysis of 2DES maps acquired in different configurations (BOXCARS and pump–probe geometry) allows the tracking and visualization of intraband Auger relaxation mechanisms, driving the hot carrier cooling, and interband bi- and tri-exciton recombination dynamics. The results obtained on archetypal core–shell CdSe/ZnS QDs suggest that, given the global analysis of the resulting datasets, 2D electronic spectroscopy techniques can successfully and efficiently dispel the intertwined dynamics of fast and ultrafast recombination processes in nanomaterials. Hence, we propose this analysis scheme to be used in future research on novel quantum confined systems.

Graphical abstract: Deciphering hot- and multi-exciton dynamics in core–shell QDs by 2D electronic spectroscopies

Back to tab navigation

Supplementary files

Article information


Submitted
23 Apr 2018
Accepted
18 Jun 2018
First published
02 Jul 2018

This article is Open Access

Phys. Chem. Chem. Phys., 2018,20, 18176-18183
Article type
Communication

Deciphering hot- and multi-exciton dynamics in core–shell QDs by 2D electronic spectroscopies

M. Righetto, L. Bolzonello, A. Volpato, G. Amoruso, A. Panniello, E. Fanizza, M. Striccoli and E. Collini, Phys. Chem. Chem. Phys., 2018, 20, 18176
DOI: 10.1039/C8CP02574F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements