Multiexciton engineering in seeded core/shell nanorods: Transfer from type-I to quasi-type-ll regimes

Amit Sift, Fabio Della Sala, Gabi Menagen, Uri Banin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

177 Scopus citations

Abstract

Multiple excitations In core/shell CdSe/CdS-seeded nanorods of different core diameters are studied by quasi-cw multiexciton spectroscopy and envelope function theoretical calculations. For core diameters below 2.8 nm, a transfer from binding to repulsive behavior is detected for the biexciton, accompanied by significant reduction of the triexciton oscillator strength. These characteristics indicate a transition of the electronic excited states from type-I localization In the core to a quasi-type-II derealization along the entire rod as the core diameter decreases, in agreement with theoretical calculations.

Original languageAmerican English
Pages (from-to)3470-3476
Number of pages7
JournalNano Letters
Volume9
Issue number10
DOIs
StatePublished - 14 Oct 2009

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