Title :
Effect of nanostructuration on the thermal conductivity of thermoelectric materials
Author :
Grauby, Stephane ; Puyoo, Etienne ; Munoz Rojo, Miguel ; Martin-Gonzalez, Marisol ; Claeys, Wilfrid ; Dilhaire, S.
Author_Institution :
LOMA, Univ. Bordeaux 1, Talence, France
Abstract :
We have investigated various kinds of nanowires (Si, Bi2Te3, SiGe) in order to evaluate the influence of the nanostructuration on their thermal conductivity. The method used is a 3ω-SThM (Scanning Thermal Microscopy) technique which enables to simultaneously measure the topography and the thermal conductivity on an assembly of NWs. We detail the procedure from the measurement itself to the nanowire thermal conductivity estimation. We show that the nanostructuration leads to a thermal conductivity reduction for the 3 materials we have studied and that Si and SiGe nanowire samples seem more promising than Bi2Te3 NWs in terms of thermoelectric applications.
Keywords :
Ge-Si alloys; bismuth compounds; elemental semiconductors; nanowires; scanning tunnelling microscopy; semiconductor materials; silicon; surface topography; thermal conductivity; thermoelectricity; Bi2Te3; STM; Si; SiGe; nanostructuration effect; nanowires; scanning thermal microscopy; surface topography; thermal conductivity; thermoelectric materials;
Conference_Titel :
Thermal Investigations of ICs and Systems (THERMINIC), 2013 19th International Workshop on
Conference_Location :
Berlin
Print_ISBN :
978-1-4799-2271-0
DOI :
10.1109/THERMINIC.2013.6675191