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

Snedaker, Matthew L. and Zhang, Yichi and Birkel, Chistina S. and Wang, Heng and Day, Tristan and Shi, Yifeng and Ji, Xiulei and Kraemer, Stephan and Mills, Carolyn E. and Moosazadeh, Armin and Moskovits, Martin and Snyder, G. Jeffrey and Stucky, Galen D. (2013) Silicon-Based Thermoelectrics Made from a Boron-Doped Silicon Dioxide Nanocomposite. Chemistry of Materials, 25 (24). pp. 4867-4873. ISSN 0897-4756.

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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.

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Snyder, G. Jeffrey0000-0003-1414-8682
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.
Funding AgencyGrant Number
Department of Energy (DOE) Office of Basic Energy SciencesDE-SC0001009
NSF Materials Research Science and Engineering Centers (MRSEC)DMR05-20415
NSF Materials Research Science and Engineering Centers (MRSEC)DMR11-21053
Feodor Lynen Research FellowshipUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Corning FellowshipUNSPECIFIED
Corning Science FoundationUNSPECIFIED
Department of Energy (DOE) Office of Science, Office of Basic Energy SciencesDE-AC02-06CH11357
Subject Keywords:thermoelectrics; silicon germanium; magnesiothermic reduction; silica; germania
Issue or Number:24
Record Number:CaltechAUTHORS:20140203-130601076
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Official Citation: Silicon-Based Thermoelectrics Made from a Boron-Doped Silicon Dioxide Nanocomposite Matthew L. Snedaker, Yichi Zhang, Christina S. Birkel, Heng Wang, Tristan Day, Yifeng Shi, Xiulei Ji, Stephan Kraemer, Carolyn E. Mills, Armin Moosazadeh, Martin Moskovits, G. Jeffrey Snyder, and Galen D. Stucky Chemistry of Materials 2013 25 (24), 4867-4873
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43625
Deposited By: Ruth Sustaita
Deposited On:03 Feb 2014 22:10
Last Modified:03 Oct 2019 06:09

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