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Precipitation of dopants and its long term effect on thermoelectric performance

de Haas, Winfried (2018) Precipitation of dopants and its long term effect on thermoelectric performance. Master's Internship Report, Chemistry.


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In this internship the precipitation over time in SiGe alloys at several temperatures was investigated. The Lifshitz-Slyozov model was applied to find out long term degradation of thermoelectric performance. Precipitation rate and equilibrium concentration was fitted to the measured results. The fit for the p-type thermoelectric materials were good although the precipitation rate was higher than expected. The reason for this deviation will lie mostly in the difference in the experimental procedures compared to literature. Due to this there are more defects which greatly increase diffusion. For phosphorus more work is needed for obtaining a good fit of the parameters used here.

Item Type: Thesis (Master's Internship Report)
Supervisor name: Blake, G.R.
Degree programme: Chemistry
Thesis type: Master's Internship Report
Language: English
Date Deposited: 06 Jul 2018
Last Modified: 06 Jul 2018 12:06

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