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Journal Reference
Advanced Materials, Volume 27, Issue 24, pages 3681–3686, 2015.
Joonki Suh1,2, Kin Man Yu1,2, Deyi Fu1,2,Xinyu Liu3, Fan Yang4, Jin Fan5, David J. Smith5, Yong-Hang Zhang6, Jacek K. Furdyna3, Chris Dames4, Wladyslaw Walukiewicz1,2 , Junqiao Wu1,2,*
[expand title=”Show Affiliations”]- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Department of Physics, University of Notre Dame, Notre Dame, IN, USA
- Department of Mechanical Engineering, University of California, Berkeley, CA, USA
- Department of Physics, Arizona State University, Tempe, AZ, USA
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, USA
Abstract
Simultaneous increases in electrical conductivity (up to 200%) and thermopower (up to 70%) are demonstrated by introducing native defects in Bi2Te3 films, leading to a high power factor of 3.4 × 10−3 W m−1 K−2. The maximum enhancement of the power factor occurs when the native defects act beneficially both as electron donors and energy filters to mobile electrons. They also act as effective phonon scatterers.
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