Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition
Ag-doped Ca3Co4O9 thin films with nominal composition of Ca3−xAgxCo4O9 (x = 0∼0.4) have been prepared on sapphire (0 0 0 1) substrates by pulsed laser deposition (PLD). Structural characterizations and surface chemical states analysis have shown that Ag substitution for Ca in the thin films can be a...
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| Format: | Journal Article |
| Language: | English |
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2012
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| Online Access: | https://hdl.handle.net/10356/94211 http://hdl.handle.net/10220/7519 |
| _version_ | 1826112347578564608 |
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| author | Sun, T. Hng, Huey Hoon Yan, Qingyu Ma, Jan |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Sun, T. Hng, Huey Hoon Yan, Qingyu Ma, Jan |
| author_sort | Sun, T. |
| collection | NTU |
| description | Ag-doped Ca3Co4O9 thin films with nominal composition of Ca3−xAgxCo4O9 (x = 0∼0.4) have been prepared on sapphire (0 0 0 1) substrates by pulsed laser deposition (PLD). Structural characterizations and surface chemical states analysis have shown that Ag substitution for Ca in the thin films can be achieved with doping amount of x ≤ 0.15; while x > 0.15, excessive Ag was found as isolated and metallic species, resulting in composite structure. Based on the perfect c-axis orientation of the thin films, Ag-doping has been found to facilitate a remarkable decrease in the in-plane electrical resistivity. However, if doped beyond the substitution limit, excessive Ag was observed to severely reduce the Seebeck coefficient. Through carrier concentration adjustment by Ag-substitution, power factor of the Ag-Ca3Co4O9 thin films could reach |
| first_indexed | 2024-10-01T03:05:51Z |
| format | Journal Article |
| id | ntu-10356/94211 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:05:51Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/942112023-07-14T15:53:38Z Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition Sun, T. Hng, Huey Hoon Yan, Qingyu Ma, Jan School of Materials Science & Engineering DRNTU::Engineering::Materials Ag-doped Ca3Co4O9 thin films with nominal composition of Ca3−xAgxCo4O9 (x = 0∼0.4) have been prepared on sapphire (0 0 0 1) substrates by pulsed laser deposition (PLD). Structural characterizations and surface chemical states analysis have shown that Ag substitution for Ca in the thin films can be achieved with doping amount of x ≤ 0.15; while x > 0.15, excessive Ag was found as isolated and metallic species, resulting in composite structure. Based on the perfect c-axis orientation of the thin films, Ag-doping has been found to facilitate a remarkable decrease in the in-plane electrical resistivity. However, if doped beyond the substitution limit, excessive Ag was observed to severely reduce the Seebeck coefficient. Through carrier concentration adjustment by Ag-substitution, power factor of the Ag-Ca3Co4O9 thin films could reach Accepted version 2012-02-09T06:48:54Z 2019-12-06T18:52:31Z 2012-02-09T06:48:54Z 2019-12-06T18:52:31Z 2011 2011 Journal Article Sun, T., Hng, H. H., Yan, Q., & Ma, J. (2011). Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition. Journal of Alloys and Compounds, 511(1), 133–138. https://hdl.handle.net/10356/94211 http://hdl.handle.net/10220/7519 10.1016/j.jallcom.2011.09.008 162124 en Journal of alloys and compounds © 2011 Elsevier B. V. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Alloys and Compounds, Elsevier B. V.. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org/10.1016/j.jallcom.2011.09.008 . application/pdf |
| spellingShingle | DRNTU::Engineering::Materials Sun, T. Hng, Huey Hoon Yan, Qingyu Ma, Jan Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition |
| title | Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition |
| title_full | Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition |
| title_fullStr | Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition |
| title_full_unstemmed | Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition |
| title_short | Effect of Ag-doping on crystal structure and high temperature thermoelectric properties of c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition |
| title_sort | effect of ag doping on crystal structure and high temperature thermoelectric properties of c axis oriented ca3co4o9 thin films by pulsed laser deposition |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/94211 http://hdl.handle.net/10220/7519 |
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