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  5. CVD diamond foils for thermoelectric applications

CVD diamond foils for thermoelectric applications

In page navigation: Research
  • Additive Manufacturing
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      • Development and Up-Scaling of the hot filament process for diamond CVD
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CVD diamond foils for thermoelectric applications

Doping and varying the grain sizes via manipulation of CVD process parameters allow the production of diamond foils with application specific properties. On the one hand, micro crystalline diamond foils with a very high heat conductivity (around 2000 W/mK)  and a very low electrical conductivity can be produced, while on the other hand boron doped (p-conduction) diamond foils  with corresponding micro and nano grain sizes can have electrical conductivities of up to 40.000 S/m and a thermal conductivity of significantly less than 100 W/mK.

It was already possible to measure Seebeck coefficients above 350 µV/K. These completely different diamond foils are being further developed to improve thermoelectrical properties.

The doping of Titanium and Vanadium for the n-conduction of diamond is another topic of research.

Contact:

apl. Prof. Dr.-Ing. habil. Stefan M. Rosiwal

Publications:

  • Borchardt R., Fromm T., Haase A., Fecher J., Rosiwal S.:
    World's First Thermoelectric Generator Made of Tailored Carbon Allotropes
    In: Advanced Engineering Materials (2020)
    ISSN: 1438-1656
    DOI: 10.1002/adem.202000108
  • Haase A., Peters A., Rosiwal S.:
    Growth and thermoelectric properties of nitrogen-doped diamond/graphite
    In: Diamond and Related Materials 63 (2016), p. 222-226
    ISSN: 0925-9635
    DOI: 10.1016/j.diamond.2015.10.023
  • Fecher J., Wormser M., Rosiwal S.:
    Long term oxidation behavior of micro- and nano-crystalline CVD diamond foils
    In: Diamond and Related Materials 61 (2016), p. 41-45
    ISSN: 0925-9635
    DOI: 10.1016/j.diamond.2015.11.009
  • Engenhorst M., Fecher J., Notthoff C., Schierning G., Schmechel R., Rosiwal S.:
    Thermoelectric transport properties of boron-doped nanocrystalline diamond foils
    In: Carbon 81 (2015), p. 650-662
    ISSN: 0008-6223
    DOI: 10.1016/j.carbon.2014.10.002
  • Sobolewski S., Lodes M., Rosiwal S., Singer R.:
    Surface energy of growth and seeding side of free standing nanocrystalline diamond foils
    In: Surface & Coatings Technology 232 (2013), p. 640-644
    ISSN: 0257-8972
    DOI: 10.1016/j.surfcoat.2013.06.051



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