Scaling of multiexciton lifetimes in semiconductor nanocrystals

Victor I Klimov, J. A. McGuire, Richard D Schaller, V. I. Rupasov

Research output: Contribution to journalArticle

147 Citations (Scopus)

Abstract

Ultrafast multiexciton decay via Auger recombination is a major impediment for prospective applications of semiconductor nanocrystals (NCs) in lasing and solar cells enabled by carrier multiplication. One important unexplored aspect of Auger recombination is the scaling of multiexciton lifetimes with the number of excitons per NC. To address this question, we analyze multiexciton dynamics in PbSe and CdSe NCs. We observe that these two systems show a distinct difference in scaling of multiexciton lifetimes, which can be explained in terms of a difference in symmetries of high-order multiexcitons resulting from significant disparity in degeneracies of the lowest-energy quantized states.

Original languageEnglish
Article number195324
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number19
DOIs
Publication statusPublished - May 23 2008

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Nanocrystals
nanocrystals
Semiconductor materials
scaling
life (durability)
multiplication
Excitons
Electron energy levels
lasing
Solar cells
solar cells
excitons
symmetry
decay
cells
energy
lead selenide
LDS 751

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Scaling of multiexciton lifetimes in semiconductor nanocrystals. / Klimov, Victor I; McGuire, J. A.; Schaller, Richard D; Rupasov, V. I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 77, No. 19, 195324, 23.05.2008.

Research output: Contribution to journalArticle

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