Journal
APPLIED PHYSICS LETTERS
Volume 119, Issue 26, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0076547
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Funding
- Ministry of the Economic Development (MiSE) [CUP I34I19005780001]
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Boron-hyperdoped nanocrystalline thin films without hydrogen embedded during deposition show an increased power factor of up to 33mW K-2 m(-1)at 300K, making nanocrystalline silicon a realistic competitor to Bi2Te3 for low-temperature heat harvesting due to its greater geo-availability and lower cost.
Single-crystalline silicon is well known to be a poor thermoelectric material due to its high thermal conductivity. Most excellent research has focused on ways to decrease its thermal conductivity while retaining acceptably large power factors (PFs). Less effort has been spent to enhance the PF in poly- and nanocrystalline silicon, instead. Here, we show that in boron-hyperdoped nanocrystalline thin films, the PF may be increased up to 33 mW K-2 m(-1) at 300 K when hydrogen embedded in the film during deposition is removed. The result makes nanocrystalline Si a realistic competitor of Bi2Te3 for low-temperature heat harvesting, also due to its greater geo-availability and lower cost.
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