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Contribution of radial dopant concentration to the thermoelectric properties of core-shell nanowires
- Source :
- Applied Physics Letters. 102:103101
- Publication Year :
- 2013
- Publisher :
- AIP Publishing, 2013.
-
Abstract
- We report the thermoelectric characteristics of core-shell p-type germanium nanowires (GeNWs) (lightly doped core, heavily doped shell). Overall, the thermoelectric characteristics are dominated by the heavily doped shell. Experimental data indicate that surface states produce dopant deactivation when the heavily doped shell is removed. Under this situation, the thermoelectric figure of merit is degraded. Etching the heavily doped shell resulted in a rough germanium nanowire with a thermal conductivity close to 1.1 W/m-K at 300 K, which is one of the smallest k measured for nanowires and comparable to the thermal conductivity of bulk SiO2.
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........608719c06bad5c58a41959aada75bbad