(608h) Temperature-Dependent Modeling of Formation and Growth of II-VI Semiconductor Nanocrystals
The experimental model system selected is cadmium selenide (CdSe) because of the good control and reproducibility offered by this class of semiconductor nanocrystals. Performing microfluidic experiments in-situ absorption spectroscopy, we obtain average time-dependent properties of CdSe QDs (i.e. concentration, average size and distribution width) at temperatures between 160-220oC. Based on population-balance equations, a kinetic deterministic model is developed and the formation of CdSe QDs is described in good agreement with the CdSe experimental data. The present model opens up the possibility to optimize the synthesis of II-VI QDs, while providing temperature dependent kinetic rates for different stages of the QD formation (e.g. nucleation, growth, and dissociation).
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