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Title: Contrasting role of antimony and bismuth dopants on the thermoelectric performance of lead selenide

Increasing the conversion efficiency of thermoelectric materials is a key scientific driver behind a worldwide effort to enable heat to electricity power generation at competitive cost. Here we report an increased performance for antimony-doped lead selenide with a thermoelectric figure of merit of ~1.5 at 800 K. This is in sharp contrast to bismuth doped lead selenide, which reaches a figure of merit of <1. Substituting antimony or bismuth for lead achieves maximum power factors between ~23–27μW cm –1 K –2 at temperatures above 400 K. The addition of small amounts (~0.25 mol%) of antimony generates extensive nanoscale precipitates, whereas comparable amounts of bismuth results in very few or no precipitates. The antimony-rich precipitates are endotaxial in lead selenide, and appear remarkably effective in reducing the lattice thermal conductivity. As a result, the corresponding bismuth-containing samples exhibit smaller reduction in lattice thermal conductivity.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [2] ;  [1] ;  [4]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Northwestern Univ., Evanston, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Materials Sciences and Engineering Division; National Science Foundation (NSF); W.M. Keck Foundation; Northwestern University
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; thermoelectrics
OSTI Identifier:
1355912

Lee, Yeseul, Lo, Shih -Han, Chen, Changqiang, Sun, Hui, Chung, Duck -Young, Chasapis, Thomas C., Uher, Ctirad, Dravid, Vinayak P., and Kanatzidis, Mercouri G.. Contrasting role of antimony and bismuth dopants on the thermoelectric performance of lead selenide. United States: N. p., Web. doi:10.1038/ncomms4640.
Lee, Yeseul, Lo, Shih -Han, Chen, Changqiang, Sun, Hui, Chung, Duck -Young, Chasapis, Thomas C., Uher, Ctirad, Dravid, Vinayak P., & Kanatzidis, Mercouri G.. Contrasting role of antimony and bismuth dopants on the thermoelectric performance of lead selenide. United States. doi:10.1038/ncomms4640.
Lee, Yeseul, Lo, Shih -Han, Chen, Changqiang, Sun, Hui, Chung, Duck -Young, Chasapis, Thomas C., Uher, Ctirad, Dravid, Vinayak P., and Kanatzidis, Mercouri G.. 2014. "Contrasting role of antimony and bismuth dopants on the thermoelectric performance of lead selenide". United States. doi:10.1038/ncomms4640. https://www.osti.gov/servlets/purl/1355912.
@article{osti_1355912,
title = {Contrasting role of antimony and bismuth dopants on the thermoelectric performance of lead selenide},
author = {Lee, Yeseul and Lo, Shih -Han and Chen, Changqiang and Sun, Hui and Chung, Duck -Young and Chasapis, Thomas C. and Uher, Ctirad and Dravid, Vinayak P. and Kanatzidis, Mercouri G.},
abstractNote = {Increasing the conversion efficiency of thermoelectric materials is a key scientific driver behind a worldwide effort to enable heat to electricity power generation at competitive cost. Here we report an increased performance for antimony-doped lead selenide with a thermoelectric figure of merit of ~1.5 at 800 K. This is in sharp contrast to bismuth doped lead selenide, which reaches a figure of merit of <1. Substituting antimony or bismuth for lead achieves maximum power factors between ~23–27μW cm–1 K–2 at temperatures above 400 K. The addition of small amounts (~0.25 mol%) of antimony generates extensive nanoscale precipitates, whereas comparable amounts of bismuth results in very few or no precipitates. The antimony-rich precipitates are endotaxial in lead selenide, and appear remarkably effective in reducing the lattice thermal conductivity. As a result, the corresponding bismuth-containing samples exhibit smaller reduction in lattice thermal conductivity.},
doi = {10.1038/ncomms4640},
journal = {Nature Communications},
number = ,
volume = 5,
place = {United States},
year = {2014},
month = {5}
}