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Enhanced high temperature thermoelectric properties of Bi-doped c-axis oriented Ca3Co4O9 thin films by pulsed laser deposition
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hng, Huey Hoon |
| Copyright Year | 2010 |
| Abstract | Ca3−xBixCo4O9 (x=0–0.4) thin films were deposited on single-crystal sapphire (0001) substrates by pulsed laser deposition. Structural characterizations indicated that these thin films exhibited perfect c-axis orientation and were well crystallized. Surface chemical states analysis confirmed Bi-substitution for Ca in the thin films with x<0.4. For the thin film with x=0.4, excessive Bi were found isolated within the film. Due to their perfect orientation, in-plane electrical properties of these thin films measured from 300 to 740 K were found to be comparable to those of the single crystals. Furthermore, Bi-substitution was noted for the reduced electrical resistivity and enhanced Seebeck coefficient. The above superior properties resulted in a high power factor of 0.81 mW m−1 K−2 at 740 K for thin film Ca2.7Bi0.3Co4O9, which was about 29% improvement as compared to that of pure Ca3Co4O9 thin film. The results suggested that Bi-doped Ca3Co4O9 thin films could be a promising candidate for thermoelectric app... |
| Starting Page | 083709 |
| Ending Page | 083709 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.3499324 |
| Volume Number | 108 |
| Alternate Webpage(s) | https://dr.ntu.edu.sg/bitstream/handle/10220/18821/8.%20Enhanced%20high%20temperature%20thermoelectric%20properties%20of%20Bi-doped%20c-axis%20oriented%20Ca3Co4O9%20thin%20films%20by%20pulsed%20laser%20deposition.pdf?isAllowed=y&sequence=1 |
| Alternate Webpage(s) | https://dr.ntu.edu.sg/bitstream/handle/10220/18821/8.%20Enhanced%20high%20temperature%20thermoelectric%20properties%20of%20Bi-doped%20c-axis%20oriented%20Ca3Co4O9%20thin%20films%20by%20pulsed%20laser%20deposition.pdf;jsessionid=7297DA9F135FF4B495CEF54EA62FB325?sequence=1 |
| Alternate Webpage(s) | https://dr.ntu.edu.sg/bitstream/handle/10220/18821/8.%20Enhanced%20high%20temperature%20thermoelectric%20properties%20of%20Bi-doped%20c-axis%20oriented%20Ca3Co4O9%20thin%20films%20by%20pulsed%20laser%20deposition.pdf;jsessionid=2FF32162CF19D751DFE63DDF3CA7CE99?sequence=1 |
| Alternate Webpage(s) | https://doi.org/10.1063/1.3499324 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
