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Abstract
Recently, epitaxially connected at facets semiconductor nanocrystals (NCs) have been introduced to fascilitate the electron transport between nanocrystals. To fully deploy their potential, a better understanding of the exciton transfer between connected NCs is needed. We go beyond the two well-known transfer mechanisms suggested by Förster and Dexter and propose a third mechanism of exciton tandem tunneling. The tandem tunneling occurs through the intermediate state in which the electron and hole are in different NCs. The corresponding rate for exciton hops is larger than the Dexter rate and for Si is even much larger that the Förster one.
Original language | English (US) |
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Pages (from-to) | 10267-10274 |
Number of pages | 8 |
Journal | ACS nano |
Volume | 10 |
Issue number | 11 |
DOIs | |
State | Published - Nov 22 2016 |
Bibliographical note
Funding Information:We are grateful to A. V. Chubukov, P. Crowell, Al. L. Efros, H. Fu, R. Holmes, A. Kamenev, U. R. Kortshagen, A. V. Rodina, I. Rousochatzakis, M. Sammon, B. Skinner, M.V. Voloshin, D. R. Yakovlev, and I. N. Yassievich for helpful discussions. This work was supported primarily by the National Science Foundation through the University of Minnesota MRSEC under Award No. DMR-1420013
Publisher Copyright:
© 2016 American Chemical Society.
Keywords
- Dexter mechanism
- energy transfer
- epitaxially connected nanocrystals
- exciton
- Förster mechanism
- nanocrystals
How much support was provided by MRSEC?
- Primary
Reporting period for MRSEC
- Period 3
PubMed: MeSH publication types
- Journal Article
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MRSEC IRG-2: Sustainable Nanocrystal Materials
Kortshagen, U. R., Aydil, E. S., Campbell, S. A., Francis, L. F., Haynes, C. L., Hogan, C., Mkhoyan, A., Shklovskii, B. I. & Wang, X.
9/1/98 → …
Project: Research project
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