Synthesis kinetics of CdSe quantum dots in trioctylphosphine oxide and in stearic acid

Files
TR Number
Date
2005-04-01
Journal Title
Journal ISSN
Volume Title
Publisher
AIP Publishing
Abstract

A diffusion-barrier model described the early evolution of size-dependent photoluminescence emission from CdSe quantum dots formed by organometallic synthesis. Emission peak widths, emission redshift rates, and nanocrystal growth rates all decreased to a minimum at a reaction completion time. Growth after the completion time by Ostwald ripening was marked by a doubling of the activation energy. The temperature dependence of both reaction completion rates and photoluminescence redshift rates followed Arrhenius behavior governed by activation energies that increased with solvent molecular weight, in this limited case. In stearic acid and in trioctylphosphine oxide, the typical activation energies were 0.6 +/- 0.1 and 0.92 +/- 0.26 eV/molecule, respectively. (c) 2005 American Institute of Physics.

Description
Keywords
Alternative routes, CDTE nanocrystals, Ii-vi, Monodisperse, Evolution, Growth, Physics
Citation
Dickerson, BD; Irving, DM; Herz, E; et al., "Synthesis kinetics of CdSe quantum dots in trioctylphosphine oxide and in stearic acid," Appl. Phys. Lett. 86, 171915 (2005); http://dx.doi.org/10.1063/1.1921347