Ag (I) and Cu (II) Doped Colloidal CdSe Nanocrystals: Partial Cation Exchange and Effect on Photoluminescence

Abstract

Optical properties of the silver and copper doped CdSe nanocrystals has been investigated. Partial cation exchange with impurity ions is done using trioctylphosphine (TOP) to facilitate the controlled doping levels. Doping is as low as few impurity ions per nanocrystal. Finally, the role of dopant ions at very low concentrations and effect of TOPon photoluminescence of the CdSe nanocrystals is explained.