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Title: Ba2TeO as an optoelectronic material: First-principles study

Abstract

The band structure, optical, and defects properties of Ba2TeO are systematically investigated using density functional theory with a view to understanding its potential as an optoelectronic or transparent conducting material. Ba2TeO crystallizes with tetragonal structure (space group P4/nmm) and with a 2.93 eV optical bandgap [Besara et al., J. Solid State Chem. 222, 60 (2015)]. We find relatively modest band masses for both electrons and holes suggesting applications. Optical properties show infrared-red absorption when doped. This could potentially be useful for combining wavelength filtering and transparent conducting functions. Furthermore, our defect calculations show that Ba2TeO is intrinsically p-type conducting under Ba-poor condition. Furthermore, the spontaneous formation of the donor defects may constrain the p-type transport properties and would need to be addressed to enable applications.

Authors:
 [1];  [1];  [1];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Florida State Univ., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Florida State Univ., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Contributing Org.:
National High Magnetic Field Laboratory; Oak Ridge National Laboratory
OSTI Identifier:
1185958
Alternate Identifier(s):
OSTI ID: 1333508
Grant/Contract Number:  
AC05-00OR22725; SC0008832
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 19; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; electronic-structures; optical absorption; oxytelluride; oxides; doping; vacancies; materials properties; band gap; optical properties

Citation Formats

Sun, Jifeng, Shi, Hongliang, Du, Mao-Hua, Siegrist, Theo, and Singh, David J. Ba2TeO as an optoelectronic material: First-principles study. United States: N. p., 2015. Web. doi:10.1063/1.4921585.
Sun, Jifeng, Shi, Hongliang, Du, Mao-Hua, Siegrist, Theo, & Singh, David J. Ba2TeO as an optoelectronic material: First-principles study. United States. https://doi.org/10.1063/1.4921585
Sun, Jifeng, Shi, Hongliang, Du, Mao-Hua, Siegrist, Theo, and Singh, David J. Thu . "Ba2TeO as an optoelectronic material: First-principles study". United States. https://doi.org/10.1063/1.4921585. https://www.osti.gov/servlets/purl/1185958.
@article{osti_1185958,
title = {Ba2TeO as an optoelectronic material: First-principles study},
author = {Sun, Jifeng and Shi, Hongliang and Du, Mao-Hua and Siegrist, Theo and Singh, David J.},
abstractNote = {The band structure, optical, and defects properties of Ba2TeO are systematically investigated using density functional theory with a view to understanding its potential as an optoelectronic or transparent conducting material. Ba2TeO crystallizes with tetragonal structure (space group P4/nmm) and with a 2.93 eV optical bandgap [Besara et al., J. Solid State Chem. 222, 60 (2015)]. We find relatively modest band masses for both electrons and holes suggesting applications. Optical properties show infrared-red absorption when doped. This could potentially be useful for combining wavelength filtering and transparent conducting functions. Furthermore, our defect calculations show that Ba2TeO is intrinsically p-type conducting under Ba-poor condition. Furthermore, the spontaneous formation of the donor defects may constrain the p-type transport properties and would need to be addressed to enable applications.},
doi = {10.1063/1.4921585},
journal = {Journal of Applied Physics},
number = 19,
volume = 117,
place = {United States},
year = {Thu May 21 00:00:00 EDT 2015},
month = {Thu May 21 00:00:00 EDT 2015}
}

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