Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 44, Issue 17, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0022-3727/44/17/174034
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Funding
- German Research Foundation (DFG) [SPP 1386, SFB 445]
- European Union
- Ministry of Economic Affairs and Energy of the State North Rhine-Westphalia in Germany
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The utilization of silicon-based materials for thermoelectrics is studied with respect to the synthesis and processing of doped silicon nanoparticles from gas phase plasma synthesis. It is found that plasma synthesis enables the formation of spherical, highly crystalline and soft-agglomerated materials. We discuss the requirements for the formation of dense sintered bodies, while keeping the crystallite size small. Small particles a few tens of nanometres and below that are easily achievable from plasma synthesis, and a weak surface oxidation, both lead to a pronounced sinter activity about 350K below the temperature usually needed for the successful densification of silicon. The thermoelectric properties of our sintered materials are comparable to the best results found for nanocrystalline silicon prepared by methods other than plasma synthesis.
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