Assessing the thermoelectric properties of single InSb nanowires: The role of thermal contact resistance
| Autor: | Ilaria Zardo, Gerhard Abstreiter, Stefano Roddaro, M. De Luca, Lucia Sorba, M.Y. Swinkels, E.A. Hoffmann, Sara Yazji, Epam Erik Bakkers, Daniele Ercolani |
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| Přispěvatelé: | Photonics and Semiconductor Nanophysics, Yazji, S, Swinkels, M. Y, De Luca, M, Hoffmann, E. A, Ercolani, Daniele, Roddaro, Stefano, Abstreiter, G, Sorba, Lucia, Bakkers, E. P. A. M, Zardo, Ilaria |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
InSb nanowires TE figure of merit thermal conductivity thermal contact resistance thermoelectric Nanowire 02 engineering and technology 010402 general chemistry 01 natural sciences Thermal conductivity Thermal bridge Thermoelectric effect Materials Chemistry Figure of merit Electrical measurements Electrical and Electronic Engineering Thermal contact conductance business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics Thermoelectric materials 0104 chemical sciences Electronic Optical and Magnetic Materials Optoelectronics 0210 nano-technology business |
| Zdroj: | Semiconductor Science and Technology, 31(6):064001. Institute of Physics Semiconductor science and technology 31 (2016). doi:10.1088/0268-1242/31/6/064001 info:cnr-pdr/source/autori:Yazji S.; Swinkels M.Y.; De Luca M.; Hoffmann E.A.; Ercolani D.; Roddaro S.; Abstreiter G.; Sorba L.; Bakkers E.P.A.M.; Zardo I./titolo:Assessing the thermoelectric properties of single InSb nanowires: The role of thermal contact resistance/doi:10.1088%2F0268-1242%2F31%2F6%2F064001/rivista:Semiconductor science and technology (Print)/anno:2016/pagina_da:/pagina_a:/intervallo_pagine:/volume:31 |
| ISSN: | 0268-1242 |
| Popis: | The peculiar shape and dimensions of nanowires (NWs) have opened the way to their exploitation in thermoelectric applications. In general, the parameters entering into the thermoelectric figure of merit are strongly interdependent, which makes it difficult to realize an optimal thermoelectric material. In NWs, instead, the power factor can be increased and the thermal conductivity reduced, thus boosting the thermoelectric efficiency compared to bulk materials. However, the assessment of all the thermoelectric properties of a NW is experimentally very challenging. Here, we focus on InSb NWs, which have proved to be promising thermoelectric materials. The figure of merit is accurately determined by using a novel method based on a combination of Raman spectroscopy and electrical measurements. Remarkably, this type of experiment provides a powerful approach allowing us to neglect the role played by thermal contact resistance. Furthermore, we compare the thermal conductivity determined by this novel method to the one determined on the same sample by the thermal bridge method. In this latter approach, the thermal contact resistance is a non-negligible parameter, especially in NWs with large diameters. We provide experimental evidence of the crucial role played by thermal contact resistance in the assessment of the thermal properties of nanostructures, using two different measurement methods of the thermal conductivity. |
| Databáze: | OpenAIRE |
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