Solid thin films of CdSe and CdSe/ZnS nanoparticles on different templates have been investigated under influence of power visible laser radiation. Composite structures including organic semiconductors and CdSe and CdSe/ZnS nanoparticles films have been fabricated. Luminescent and electron properties of the structures have been investigated. Luminescence quantum yield of these nanocomposite structures is shown to exceed that of the films of organic dyes by two orders of magnitude for CdSe nanoparticles with ZnS shell. As for quantum dots without the shell their luminescence quantum yield appears to fall drastically in the films and even in the matrices of organic semiconductors compared to the solution. The presence of CdSe films in multi-layer structures of polyimides leads to abrupt increase in their conductivity by several orders of magnitude. The prospects of development of photovoltaic elements and light-emitting devices including the films with high concentration of CdSe and CdSe/ZnS quantum dots are discussed.

Date Published: 23 April 2008
PDF: 8 pages
Proc. SPIE 6988, Nanophotonics II, 69881H (23 April 2008); doi: 10.1117/12.781616

Published in SPIE Proceedings Vol. 6988:
Nanophotonics II
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)