Au-PbS core-shell nanocrystals: Plasmonic absorption enhancement and electrical doping via intra-particle charge transfer

Jong Soo Lee, Elena V. Shevchenko, Dmitri V. Talapin

Research output: Contribution to journalArticlepeer-review

330 Scopus citations

Abstract

We present a comparative study of optical and electronic properties for PbS nanocrystals and Au-PbS core-shell nanostructures. In Au-PbS nanostructures, we observed two nontrivial synergistic effects: (i) extinction enhancement due to coupling of surface plasmon resonance in the Au core to the excitonic states in the semiconducting PbS shell, and (ii) strong p-type electronic doping of Au-PbS nanocrystal solids that we explained by the intraparticle charge transfer between the PbS shell and the Au core.

Original languageEnglish
Pages (from-to)9673-9675
Number of pages3
JournalJournal of the American Chemical Society
Volume130
Issue number30
DOIs
StatePublished - 30 Jul 2008

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