Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 3, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3462936
Keywords
elemental semiconductors; phonons; porosity; porous semiconductors; silicon; thermal conductivity
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Funding
- Direccion General de Investigacion of the Spanish Ministry of Science and Innovation [FIS 2009-13370-C02-01]
- Direccio General of the Generalitat of Catalonia [2009SGR-00164]
- University of Basilicata
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Phonon hydrodynamics is used to analyze the influence of porosity and of pore size on reduction in thermal conductivity in porous silicon, with respect to crystalline silicon. The expressions predict that the thermal conductivity is lower for higher porosity and for smaller pore radius, as a consequence of phonon ballistic effects. The theoretical results describe experimental data better than the assumption that they only depend on porosity. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3462936]
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