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.
World's First Thermoelectric Generator Made of Tailored Carbon Allotropes
In: Advanced Engineering Materials (2020)
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Growth and thermoelectric properties of nitrogen-doped diamond/graphite
In: Diamond and Related Materials 63 (2016), p. 222-226
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Long term oxidation behavior of micro- and nano-crystalline CVD diamond foils
In: Diamond and Related Materials 61 (2016), p. 41-45
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Thermoelectric transport properties of boron-doped nanocrystalline diamond foils
In: Carbon 81 (2015), p. 650-662
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Surface energy of growth and seeding side of free standing nanocrystalline diamond foils
In: Surface & Coatings Technology 232 (2013), p. 640-644
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