The use of silicon-germanium superlattices for thermoelectric devices and microfabricated generators

Ferre Llin, L. et al. (2016) The use of silicon-germanium superlattices for thermoelectric devices and microfabricated generators. ECS Transactions, 75(8), pp. 469-478. (doi: 10.1149/07508.0469ecst)

Abstract

Low dimensional structures such as superlattices have the potential to improve the thermoelectric properties of materials by engineering the scattering of phonons to reduce the thermal conductivity and therefore improve the thermeoelectric performance. Here we demonstrate the reduction in thermal conductivity in Ge/SiGe superlattices using multiple barrier engineering to scatter acoustic phonons at the key wavelengths for thermal transport. The approach allows ZT to be increased in wide quantum well superlattices through the reduction of heterointerfaces which scatter both electrons and phonons.

• Item Type: Articles
• Additional Information: PRiME 2016/230th ECS Meeting, Honolulu, HI, USA, 2-7 Oct 2016.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Mirando, Mr Francesco and Ferre Llin, Dr Lourdes and Samarelli, Mr Antonio and Paul, Professor Douglas and Gallacher, Dr Kevin
• Authors: Ferre Llin, L., Mirando, F., Frigerio, J., Samarelli, A., Frigerio, J.B.J., Giliberti, V., Pellegrini, G., Gallacher, K., Fischer, M., Brida, D., Isella, G., Biagioni, P., Paul, D. J., and Ortolani, M.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering; College of Science and Engineering > School of Physics and Astronomy
• Journal Name: ECS Transactions
• Publisher: The Electrochemical Society
• ISSN: 1938-6737
• ISSN (Online): 1938-6737
• Copyright Holders: Copyright © 2016 The Eletrochemical Society
• First Published: First published in ECS Transactions 75(8):469-478
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher