Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes

Milan Sykora, Melissa A. Petruska, James H. Alstrum-Acevedo, Jason Leonard, Thomas J. Meyer, Victor Klimov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Understanding of energy and charge transfer processes at the semiconductor/liquid junction interfaces is important for design of new type of electronic and photovoltaic devices. We have investigated interfacial energy and charge transfer processes in assemblies consisting of CdSe NQDs and Ru-polypyridine complexes. We show that in the NQD/Ru-complex assemblies the NQD photoluminescence (PL) is quenched with efficiencies up to 100%. The mechanism of quenching is either ET or CT, depending on NC size. In the case of small NCs, the dominant interaction mechanism is dipole-dipole type ET due to the large overlap of the NC PL and the absorption spectrum of the complex. For large NCs, the overlap of the NC PL and the absorption spectrum of the complex is small and the dominant interaction mechanism is rapid CT. Demonstrated sensitization of complexes with NQDs opens interesting opportunities for designing new types of photocatalytic materials for solar energy conversion applications.

Original languageEnglish
Title of host publication234th ACS National Meeting, Abstracts of Scientific Papers
Publication statusPublished - Dec 31 2007
Event234th ACS National Meeting - Boston, MA, United States
Duration: Aug 19 2007Aug 23 2007

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other234th ACS National Meeting
CountryUnited States
CityBoston, MA
Period8/19/078/23/07

    Fingerprint

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Sykora, M., Petruska, M. A., Alstrum-Acevedo, J. H., Leonard, J., Meyer, T. J., & Klimov, V. (2007). Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes. In 234th ACS National Meeting, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).