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 I 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 publicationACS National Meeting Book of Abstracts
Publication statusPublished - 2007
Event234th ACS National Meeting - Boston, MA, United States
Duration: Aug 19 2007Aug 23 2007

Other

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

Fingerprint

Interfacial energy
Energy transfer
Nanocrystals
Semiconductor quantum dots
Charge transfer
Photoluminescence
Absorption spectra
Energy conversion
Solar energy
Quenching
Semiconductor materials
Liquids

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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

Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes. / Sykora, Milan; Petruska, Melissa A.; Alstrum-Acevedo, James H.; Leonard, Jason; Meyer, Thomas J.; Klimov, Victor I.

ACS National Meeting Book of Abstracts. 2007.

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

Sykora, M, Petruska, MA, Alstrum-Acevedo, JH, Leonard, J, Meyer, TJ & Klimov, VI 2007, Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes. in ACS National Meeting Book of Abstracts. 234th ACS National Meeting, Boston, MA, United States, 8/19/07.
Sykora M, Petruska MA, Alstrum-Acevedo JH, Leonard J, Meyer TJ, Klimov VI. Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes. In ACS National Meeting Book of Abstracts. 2007
Sykora, Milan ; Petruska, Melissa A. ; Alstrum-Acevedo, James H. ; Leonard, Jason ; Meyer, Thomas J. ; Klimov, Victor I. / Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes. ACS National Meeting Book of Abstracts. 2007.
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AU - Leonard, Jason

AU - Meyer, Thomas J.

AU - Klimov, Victor I

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