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Factors governing the quality of aqueous CdTe nanocrystals: calculations and experiment
Alexey Shavel1, Nikolai Gaponik, Alexander Eychmüller
1Physical Chemistry, Technische Universitaet Dresden, Bergstrasse 66b, 01062 Dresden, Germany.
Abstract:
The aqueous synthesis of thiol-stabilized semiconductor CdTe colloidal nanocrystals has been revisited. We found optimal conditions for the synthesis of high-quality CdTe NCs through a study of the influence of the initial conditions (structure and concentration of Cd-thiol complexes) on the quality of the CdTe nanocrystals. A numerical calculation shows a clear correlation between the concentration of CdL (where L is (SCH(2)COO)(2-)) in the initial solution and the photoluminescence quantum efficiency of the CdTe nanocrystals.
