Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction
Ferrite perovskites have exhibited promising p-type conductivity and oxygen evolution reaction (OER) activity. In this work, we investigate heteroepitaxial p-n junctions formed by La0.88Sr0.12FeO3 and n-SrTiO3(001). Sr substitution for La in LaFeO3 is shown to be effective for introducing p-type con...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/89761 http://hdl.handle.net/10220/46364 |
| _version_ | 1826113682121162752 |
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| author | Wang, L. Du, Y. Chang, L. Stoerzinger, K. A. Bowden, M. E. Wang, J. Chambers, S. A. |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Wang, L. Du, Y. Chang, L. Stoerzinger, K. A. Bowden, M. E. Wang, J. Chambers, S. A. |
| author_sort | Wang, L. |
| collection | NTU |
| description | Ferrite perovskites have exhibited promising p-type conductivity and oxygen evolution reaction (OER) activity. In this work, we investigate heteroepitaxial p-n junctions formed by 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. |
| first_indexed | 2024-10-01T03:27:13Z |
| format | Journal Article |
| id | ntu-10356/89761 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:27:13Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/897612023-07-14T15:51:12Z Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction Wang, L. Du, Y. Chang, L. Stoerzinger, K. A. Bowden, M. E. Wang, J. Chambers, S. A. School of Materials Science & Engineering X-ray Photoelectron Spectroscopy Band Gap DRNTU::Engineering::Materials Ferrite perovskites have exhibited promising p-type conductivity and oxygen evolution reaction (OER) activity. In this work, we investigate heteroepitaxial p-n junctions formed by 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. MOE (Min. of Education, S’pore) Published version 2018-10-18T04:32:25Z 2019-12-06T17:32:53Z 2018-10-18T04:32:25Z 2019-12-06T17:32:53Z 2018 Journal Article Wang, L., Du, Y., Chang, L., Stoerzinger, K. A., Bowden, M. E., Wang, J., & Chambers, S. A. (2018). Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction. Applied Physics Letters, 112(26), 261601-. doi:10.1063/1.5030897 0003-6951 https://hdl.handle.net/10356/89761 http://hdl.handle.net/10220/46364 10.1063/1.5030897 en Applied Physics Letters © 2018 The Author(s) (Published by AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of The Author(s) (Published by AIP). The published version is available at: [http://dx.doi.org/10.1063/1.5030897]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf |
| spellingShingle | X-ray Photoelectron Spectroscopy Band Gap DRNTU::Engineering::Materials 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 |
| title | Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction |
| title_full | Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction |
| title_fullStr | Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction |
| title_full_unstemmed | Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction |
| title_short | Band alignment and electrocatalytic activity at the p-n La0.88Sr0.12FeO3/SrTiO3(001) heterojunction |
| title_sort | band alignment and electrocatalytic activity at the p n la0 88sr0 12feo3 srtio3 001 heterojunction |
| topic | X-ray Photoelectron Spectroscopy Band Gap DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/89761 http://hdl.handle.net/10220/46364 |
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