Electron Transfer in Quantum-Dot-Sensitized ZnO Nanowires: Ultrafast Time-Resolved Absorption and Terahertz Study

Summary, in English

Photoinduced electron injection dynamics from CdSe quantum dots to ZnO nanowires is studied by transient absorption and time-resolved terahertz spectroscopy measurements. Ultrafast electron transfer from the CdSe quantum dots to ZnO is proven to be efficient already on a picoseconds time scale (tau = 3-12 ps). The measured kinetics was found to have a two-component character, whose origin is discussed in detail. The obtained results suggest that electrons are injected into ZnO via an intermediate charge transfer state.

• Författare: Karel Zidek; Kaibo Zheng; Carlito Ponseca; Maria Messing; Reine Wallenberg; Pavel Chabera; Mohamed Qenawy; Villy Sundström; Tönu Pullerits
• Avdelning/ar: Kemisk fysik; Fasta tillståndets fysik; Centrum för analys och syntes; NanoLund: Centre for Nanoscience
• Publiceringsår: 2012
• Språk: Engelska
• Sidor: 12110-12117
• Publikation/Tidskrift/Serie: Journal of the American Chemical Society
• Volym: 134
• Issue: 29
• Länkar: http://dx.doi.org/10.1021/ja3029679
• Dokumenttyp: Artikel i tidskrift
• Förlag: The American Chemical Society (ACS)
• Ämne: Condensed Matter Physics; Atom and Molecular Physics and Optics; Chemical Sciences
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1520-5126