CaltechAUTHORS
Published December 24, 2013 | Version Supplemental Material
Journal Article Open

Silicon-Based Thermoelectrics Made from a Boron-Doped Silicon Dioxide Nanocomposite

Creators

  • 1. ROR icon University of California, Santa Barbara
  • 2. ROR icon California Institute of Technology
  • 3. ROR icon Hangzhou Normal University
  • 4. ROR icon Oregon State University

Abstract

We report a method for preparing p-type silicon germanium bulk alloys directly from a boron-doped silica germania nanocomposite. This is the first successful attempt to produce and characterize the thermoelectric properties of SiGe-based thermoelectric materials prepared at temperatures below the alloy's melting point through a magnesiothermic reduction of the silica-germania nanocomposite. We observe a thermoelectric power factor that is competitive with the literature record obtained for high energy ball milled nanocomposites. The large grain size in our hot pressed samples limits the thermoelectric figure of merit to 0.5 at 800 °C for an optimally doped Si_(80)Ge_(20) alloy.

Additional Information

© 2013 American Chemical Society. Publication Date (Web): December 5, 2013. Received: June 19, 2013; Revised: November 20, 2013. This work was supported by the Center for Energy Efficient Materials, an Energy Frontier Research Center, funded by the U.S. D.O.E., Office of Basic Energy Science, under Award No. DE-SC0001009. The MRL Central Facilities are supported by the MRSEC Program of the NSF under Award Nos. DMR05- 20415 and DMR11-21053, a member of the NSF-funded Materials Research Facilities Network. C.S.B. is a recipient of the Feodor Lynen Research Fellowship supported by the Alexander von Humboldt foundation. Y.Z. is a recipient of the Corning Fellowship, supported by the Corning Science Foundation. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. H.W., T.D., and G.J.S. thank NASA/JPL for support. Y.S. thanks NSFC (21103038) for support. We would like to thank Ben Curtin, Peter Burke, Dr. Thomas E. Mates, and Deryck Stave for their valuable insight and contributions.

Attached Files

Supplemental Material - cm401990c_si_001.pdf

Files

cm401990c_si_001.pdf

Files (2.5 MB)

Name Size
md5:53651dfccbc2b7842e21406e66ade74b
2.5 MB Preview Download

Additional details

Identifiers

Eprint ID
43625
DOI
10.1021/cm401990c
Resolver ID
CaltechAUTHORS:20140203-130601076

Funding

Department of Energy (DOE) Office of Basic Energy Sciences
DE-SC0001009
NSF Materials Research Science and Engineering Centers (MRSEC)
DMR05-20415
NSF Materials Research Science and Engineering Centers (MRSEC)
DMR11-21053
Feodor Lynen Research Fellowship
Alexander von Humboldt Foundation
Corning Fellowship
Corning Science Foundation
Department of Energy (DOE) Office of Science, Office of Basic Energy Sciences
DE-AC02-06CH11357
NSFC
21103038
NASA/JPL

Dates

Created
2014-02-03
Created from EPrint's datestamp field
Updated
2021-11-10
Created from EPrint's last_modified field