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Heterogeneous Distribution of Sodium for High Thermoelectric Performance of p-type Multiphase Lead-Chalcogenides

Yamini, Sima Aminorroaya and Mitchell, David R. G. and Gibbs, Zachary M. and Santos, Rafael and Patterson, Vaughan and Lin, Sean and Pei, Yan Zhong and Dou, Shi Xue and Snyder, G. Jeffrey (2015) Heterogeneous Distribution of Sodium for High Thermoelectric Performance of p-type Multiphase Lead-Chalcogenides. Advanced Energy Materials, 5 (21). Art. No. 1501047. ISSN 1614-6832. https://resolver.caltech.edu/CaltechAUTHORS:20151217-095050688

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Abstract

Despite the effectiveness of sodium as a p-type dopant for lead chalcogenides, its solubility is shown to be very limited in these hosts. Here, a high thermoelectric efficiency of ≈2 over a wide temperature range is reported in multiphase quaternary (PbTe)_(0.65)(PbS)_(0.25)(PbSe)_(0.1) compounds that are doped with sodium at concentrations greater than the solubility limits of the matrix. Although these compounds present room temperature thermoelectric efficiencies similar to sodium doped PbTe, a dramatically enhanced Hall carrier mobility at temperatures above 600 K for heavily doped compounds results in significantly enhanced thermoelectric efficiencies at elevated temperatures. This is achieved through the composition modulation doping mechanism resulting from heterogeneous distribution of the sodium dopant between precipitates and the matrix at elevated temperatures. These results can lead to further advances in designing high performance multiphase thermoelectric materials with intrinsically heterogeneous dopant distributions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/aenm.201501047DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/aenm.201501047/abstractPublisherArticle
ORCID:
AuthorORCID
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2015 John Wiley & Sons, Inc. Manuscript Received: 27 May 2015; Manuscript Revised: 26 July 2015; Article first published online: 14 August 2015. Funded by Australian Research Council. Grant Number: DE130100310; ARC-Linkage, Infrastructure, Equipment and Facilities. Grant Number: LE120100104.
Funders:
Funding AgencyGrant Number
Australian Research CouncilDE130100310
Australian Research CouncilLE120100104
Issue or Number:21
Record Number:CaltechAUTHORS:20151217-095050688
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151217-095050688
Official Citation:Yamini S. A., Mitchell D. R. G., Gibbs Z. M., Santos R., Patterson V., Li S., Pei Y. Z., Dou S. X., Snyder G. J. (2015). Heterogeneous Distribution of Sodium for High Thermoelectric Performance of p-type Multiphase Lead-Chalcogenides. Adv. Energy Mater., 5: 1501047. doi: 10.1002/aenm.201501047
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63030
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:17 Dec 2015 18:05
Last Modified:03 Oct 2019 09:24

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