Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published September 25, 2012 | public
Journal Article

A Mesoporous Anisotropic n-Type Bi_2Te_3 Monolith with Low Thermal Conductivity as an Efficient Thermoelectric Material

Abstract

A mesoporous Bi_2Te_3 monolith with ≈20% porosity is fabricated by hot-pressing mesoporous powders. The mesostructures are able to transport carriers and scatter phonons efficiently. The reduction (≈60%) of the thermal conductivity is sufficient to compensate for the loss of electrical conductivity perpendicular to the direction of applied pressure, leading to an enhanced zT of 0.7, highest among all reported self-doped, n-type Bi_2Te_3 at similar temperatures.

Additional Information

© 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Issue published online: 18 Sep 2012; Article first published online: 23 Jul 2012; Manuscript Received: 16 May 2012. The authors sincerely thank Dr. Deryck Stave for assistance with instrument use. This work was supported by the Center for Energy Efficient Materials (CEEM), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Basic Energy Sciences under Award Number DESC0001009. The MRL Central Facilities are supported by the MRSEC Program of the NSF under Award No. DMR 1121053; a member of the NSF-funded Materials Research Facilities Network (www. mrfn.org). Y.Z. is a recipient of the Corning Fellowship supported by the Corning Science Foundation and C.S.B. is a recipient of the Feodor Lynen Research Fellowship supported by the Alexander von Humboldt foundation. X.J. is funded by a postdoctoral fellowship from Natural Sciences and Engineering Council of Canada. G.J.S. thanks the AFOSR MURI FA9550-10-1-0533 for support.

Additional details

Created:
August 22, 2023
Modified:
October 20, 2023