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Title: Band Alignment and Electrocatalytic Activity at the p - n La 0.88Sr 0.12FeO 3/SrTiO 3 (001) Heterojunction

Abstract

Ferrites perovskites have exhibited promising p-type conductivity and oxygen evolution reaction (OER) activity. In this work, we investigate heteroepitaxial p-n junctions formed with La 0.88Sr 0.12FeO 3 and n-SrTiO 3(001). Sr substitution for La in LaFeO 3 is shown to be effective for introducing p-type conductivity, lowering the optical bandgap, and enhancing electrocatalytic OER. A staggered, type-II band alignment with a large built-in potential within the LSFO forms due to the polar interface. This electronic structure facilitates charge transfer across the p-n junction and accounts for the strongly thickness-dependent extent of OER we observe.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [3];  [2];  [1]
  1. Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, 902 Battelle Blvd., Richland, Washington 99352, USA
  2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
  3. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1495391
Report Number(s):
PNNL-SA-135023
Journal ID: ISSN 0003-6951
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 112; Journal Issue: 26; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English

Citation Formats

Wang, L., Du, Y., Chang, L., Stoerzinger, K. A., Bowden, M. E., Wang, J., and Chambers, S. A. Band Alignment and Electrocatalytic Activity at the p - n La0.88Sr0.12FeO3/SrTiO3 (001) Heterojunction. United States: N. p., 2018. Web. doi:10.1063/1.5030897.
Wang, L., Du, Y., Chang, L., Stoerzinger, K. A., Bowden, M. E., Wang, J., & Chambers, S. A. Band Alignment and Electrocatalytic Activity at the p - n La0.88Sr0.12FeO3/SrTiO3 (001) Heterojunction. United States. doi:10.1063/1.5030897.
Wang, L., Du, Y., Chang, L., Stoerzinger, K. A., Bowden, M. E., Wang, J., and Chambers, S. A. Mon . "Band Alignment and Electrocatalytic Activity at the p - n La0.88Sr0.12FeO3/SrTiO3 (001) Heterojunction". United States. doi:10.1063/1.5030897.
@article{osti_1495391,
title = {Band Alignment and Electrocatalytic Activity at the p - n La0.88Sr0.12FeO3/SrTiO3 (001) Heterojunction},
author = {Wang, L. and Du, Y. and Chang, L. and Stoerzinger, K. A. and Bowden, M. E. and Wang, J. and Chambers, S. A.},
abstractNote = {Ferrites perovskites have exhibited promising p-type conductivity and oxygen evolution reaction (OER) activity. In this work, we investigate heteroepitaxial p-n junctions formed with La0.88Sr0.12FeO3 and n-SrTiO3(001). Sr substitution for La in LaFeO3 is shown to be effective for introducing p-type conductivity, lowering the optical bandgap, and enhancing electrocatalytic OER. A staggered, type-II band alignment with a large built-in potential within the LSFO forms due to the polar interface. This electronic structure facilitates charge transfer across the p-n junction and accounts for the strongly thickness-dependent extent of OER we observe.},
doi = {10.1063/1.5030897},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 26,
volume = 112,
place = {United States},
year = {2018},
month = {6}
}

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