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 language | English |
|---|---|
| Title of host publication | ACS National Meeting Book of Abstracts |
| Publication status | Published - 2007 |
| Event | 234th ACS National Meeting - Boston, MA, United States Duration: Aug 19 2007 → Aug 23 2007 |
Other
| Other | 234th ACS National Meeting |
|---|---|
| Country | United States |
| City | Boston, MA |
| Period | 8/19/07 → 8/23/07 |
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ASJC Scopus subject areas
- Chemistry(all)
Cite this
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 proceeding › Conference contribution
}
TY - GEN
T1 - Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes
AU - Sykora, Milan
AU - Petruska, Melissa A.
AU - Alstrum-Acevedo, James H.
AU - Leonard, Jason
AU - Meyer, Thomas J.
AU - Klimov, Victor I
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=37349033683&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=37349033683&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:37349033683
SN - 0841269556
SN - 9780841269552
BT - ACS National Meeting Book of Abstracts
ER -