International Journal of Photoenergy 
Volume 2006 (2006), Article ID 90242, 7 pages
doi:10.1155/IJP/2006/90242

Photophysical properties of self-aggregated porphyrin: semiconductor nanoassemblies

E. Zenkevich,1 T. Blaudeck,2 M. Abdel-Mottaleb,3 F. Cichos,2 A. Shulga,1 and C. von Borczyskowski3

 1National Academy of Science, Frantsishak Skaryna Avenue, Minsk 220072, Belarus
2Photonics and Optical Materials Group, Center for Nanostructured Materials and Analytics (NanoMA), Chemnitz University of Technology, Chemnitz 09107, Germany
3Optical Spectroscopy and Molecular Physics Group, Center for Nanostructured Materials and Analytics (NanoMA), Chemnitz University of Technology, Chemnitz 09107, Germany
Received 4 July 2005; Accepted 5 January 2006

Abstract

Colloidal semiconductor nanocrystals from CdSe show photoluminescence quenching via titration with porphyrin derivatives. This quenching is an indication of the formation of nanoassemblies via surface attachment of pyridyl linker groups. As a consequence of the complex formation, dynamic and/or static interactions between QD and porphyrins are induced. Quenching efficiencies depend critically on sample stability, temperature, solvent, and electronic properties of the porphyrins. In order to optimize photoinduced dynamic processes these parameters have to be under control.