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Title: Computational discovery of promising new n-type dopable ABX Zintl thermoelectric materials

Abstract

Computational prediction of good thermoelectric (TE) performance in several n-type doped Zintl phases, combined with successful experimental realization, has sparked interest in discovering new n-type dopable members of this family of materials. However, most known Zintls are typically only p-type dopable; prior successes in finding n-type Zintl phases have been largely serendipitous. Here in this paper, we go beyond previously synthesized Zintl phases and perform chemical substitutions in known n-type dopable ABX Zintl phases to discover new ones. We use first-principles calculations to predict their stability, potential for TE performance as well as their n-type dopability. Using this approach, we find 17 new ABX Zintl phases in the KSnSb structure type that are predicted to be stable. Several of these newly predicted phases (KSnBi, RbSnBi, NaGeP) are found to exhibit promising n-type TE performance and are n-type dopable. We propose these compounds for further experimental studies, especially KSnBi and RbSnBi, which are both predicted to be good TE materials with high electron concentrations due to self-doping by native defects, when grown under alkali-rich conditions.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [2];  [1]
  1. Colorado School of Mines, Golden, CO (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1637303
Alternate Identifier(s):
OSTI ID: 1617079
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Materials Horizons
Additional Journal Information:
Journal Volume: 7; Journal Issue: 7; Journal ID: ISSN 2051-6347
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Gorai, Prashun, Ganose, Alex, Faghaninia, Alireza, Jain, Anubhav, and Stevanović, Vladan. Computational discovery of promising new n-type dopable ABX Zintl thermoelectric materials. United States: N. p., 2020. Web. doi:10.1039/d0mh00197j.
Gorai, Prashun, Ganose, Alex, Faghaninia, Alireza, Jain, Anubhav, & Stevanović, Vladan. Computational discovery of promising new n-type dopable ABX Zintl thermoelectric materials. United States. https://doi.org/10.1039/d0mh00197j
Gorai, Prashun, Ganose, Alex, Faghaninia, Alireza, Jain, Anubhav, and Stevanović, Vladan. Mon . "Computational discovery of promising new n-type dopable ABX Zintl thermoelectric materials". United States. https://doi.org/10.1039/d0mh00197j. https://www.osti.gov/servlets/purl/1637303.
@article{osti_1637303,
title = {Computational discovery of promising new n-type dopable ABX Zintl thermoelectric materials},
author = {Gorai, Prashun and Ganose, Alex and Faghaninia, Alireza and Jain, Anubhav and Stevanović, Vladan},
abstractNote = {Computational prediction of good thermoelectric (TE) performance in several n-type doped Zintl phases, combined with successful experimental realization, has sparked interest in discovering new n-type dopable members of this family of materials. However, most known Zintls are typically only p-type dopable; prior successes in finding n-type Zintl phases have been largely serendipitous. Here in this paper, we go beyond previously synthesized Zintl phases and perform chemical substitutions in known n-type dopable ABX Zintl phases to discover new ones. We use first-principles calculations to predict their stability, potential for TE performance as well as their n-type dopability. Using this approach, we find 17 new ABX Zintl phases in the KSnSb structure type that are predicted to be stable. Several of these newly predicted phases (KSnBi, RbSnBi, NaGeP) are found to exhibit promising n-type TE performance and are n-type dopable. We propose these compounds for further experimental studies, especially KSnBi and RbSnBi, which are both predicted to be good TE materials with high electron concentrations due to self-doping by native defects, when grown under alkali-rich conditions.},
doi = {10.1039/d0mh00197j},
journal = {Materials Horizons},
number = 7,
volume = 7,
place = {United States},
year = {Mon Apr 27 00:00:00 EDT 2020},
month = {Mon Apr 27 00:00:00 EDT 2020}
}

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