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Title: New stable ternary alkaline-earth metal Pb(II) oxides: Ca / Sr / BaPb 2 O 3 and BaPbO 2

Journal Article · · Physical Review Materials
 [1];  [2];  [3]
  1. Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy; Jilin Univ., Changchun (China). Key Lab. of Automobile Materials of MOE, College of Materials Science and Engineering
  2. Jilin Univ., Changchun (China). Key Lab. of Automobile Materials of MOE, College of Materials Science and Engineering
  3. Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy

The different but related chemical behaviors of Pb(II) oxides compared to Sn(II) oxides, and the existence of known alkali/alkali-earth metal Sn(II) ternary phases, suggest that there should be additional ternary Pb(II) oxide phases. Here, we report structure searches on the ternary alkaline-earth metal Pb(II) oxides leading to four new phases. These are two ternary Pb(II) oxides, SrPb2O3 and BaPb2O3, which have larger chemical potential stability ranges compared with the corresponding Sn(II) oxides, and additionally two other ternary Pb(II) oxides, CaPb2O3 and BaPbO2, for which there are no corresponding Sn(II) oxides. Those Pb(II) oxides are stabilized by Pb-rich conditions. These structures follow the Zintl behavior and consist of basic structural motifs of (PbO3)4- anionic units separated and stabilized by the alkaline-earth metal ions. They show wide band gaps ranging from 2.86 to 3.12 eV, and two compounds (CaPb2O3 and SrPb2O3) show rather light hole effective masses (around 2m0). The valence band maxima of these compounds have a Pb-6s/O-2p antibonding character, which may lead to p-type defect (or doping) tolerant behavior. This then suggests alkaline-earth metal Pb(II) oxides may be potential p-type transparent conducting oxides.

Research Organization:
Univ. of Missouri, Columbia, MO (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014607; SC0001299; FG02-09ER46577
OSTI ID:
1399366
Alternate ID(s):
OSTI ID: 1399629
Journal Information:
Physical Review Materials, Vol. 1, Issue 5; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Cited By (3)

Discovery of TaFeSb-based half-Heuslers with high thermoelectric performance journal January 2019
Transparent conducting materials discovery using high-throughput computing journal June 2019
First principles based screen for identification of transparent conductors journal January 2019

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