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Resonant carrier scattering by core-shell nanoparticles for thermoelectric power factor enhancement.
- Source :
-
Applied Physics Letters . 1/2/2012, Vol. 100 Issue 1, p012102. 4p. 1 Diagram, 3 Graphs. - Publication Year :
- 2012
-
Abstract
- We theoretically investigate the use of energetically sharp resonances of core-shell nanoparticles embedded in semiconductors to selectively scatter carriers and thereby enhance the thermoelectric power factor and figure of merit. Appropriate selection of materials for the core-shell band structure can lead to the formation of quasi-bound states inside the nanoparticles, which strongly scatter carriers near these energy levels, making sharp features in the energy-dependent electron relaxation time. We find that the power factor of PbTe at 80 K is enhanced by more than 80% when core-shell nanoparticles of 3 nm core diameter and 1.5 nm shell width are introduced with density 1 × 1018 cm-3. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 100
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 70166438
- Full Text :
- https://doi.org/10.1063/1.3673615