Porous Silicon and Thermoelectrics

Yimin Chao

doi:10.1007/978-3-319-04508-5_110-1

Porous Silicon and Thermoelectrics

Research output: Chapter in Book/Report/Conference proceeding › Chapter (peer-reviewed) › peer-review

Abstract

The motivation for, and performance of, silicon nanostructures including porous silicon in thermoelectrics is reviewed. A high thermoelectric figure of merit ZT ~1 has been achieved with a single silicon nanowire and ZT ~0.5 for a porous nanowire array. Very high Seebeck coefficients (3.2 mVK−1) have been achieved in compressed nanoparticles. Data is also presented relevant to two key factors limiting performance in bulk powders. The original size of silicon particles has a significant effect on the thermal conductivities of densified pellets. The intrinsic low electric conductivity can be improved by doping either nanocrystals or surface conductive ligands.

Original language	English
Title of host publication	Handbook of Porous Silicon
Editors	Leigh Canham
Publisher	Springer
ISBN (Electronic)	978-3-319-04508-5
ISBN (Print)	978-3-319-04508-5
DOIs	https://doi.org/10.1007/978-3-319-04508-5_110-1
Publication status	Published - 24 Dec 2016

Keywords

Porous silicon
Nanowire
Nanostructure
Thermoelectrics
Seebeck coefficient

Access to Document

10.1007/978-3-319-04508-5_110-1

Cite this

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AB - The motivation for, and performance of, silicon nanostructures including porous silicon in thermoelectrics is reviewed. A high thermoelectric figure of merit ZT ~1 has been achieved with a single silicon nanowire and ZT ~0.5 for a porous nanowire array. Very high Seebeck coefficients (3.2 mVK−1) have been achieved in compressed nanoparticles. Data is also presented relevant to two key factors limiting performance in bulk powders. The original size of silicon particles has a significant effect on the thermal conductivities of densified pellets. The intrinsic low electric conductivity can be improved by doping either nanocrystals or surface conductive ligands.

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KW - Nanostructure

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KW - Seebeck coefficient

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