Size-dependent oxygen-related electronic states in silicon nanocrystals

J. S. Biteen, N. S. Lewis, H. A. Atwater, A. Polman

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)


The isolation of silicon nanocrystals embedded in SiO 2 and isolated nanocrystals' excitonic emission energy were investigated during controlled oxidation. The nanocrystals with diameters of ∼2.9-3.4 nm exhibited photoluminescence (PL) blueshift upon oxidatively induced size reduction. The oxidation of smaller Si nanocrystals resulted in a PL blueshift, but a redshift in the PL was observed after growth of ∼0.3 monolayers of native oxide. The results show that decrease in excitonic emission energy during oxidation is consistent with formation of an oxygen-related excitonic recombination state.

Original languageEnglish
Pages (from-to)5389-5391
Number of pages3
JournalApplied Physics Letters
Issue number26
Publication statusPublished - Jun 28 2004

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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