| MATERIALS AND SUSTAINABLE DEVELOPMENT-- ADVANCED MATERIALS FOR CLEAN ENERGY UTILIZATION |
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| Pulsed Laser Deposition of c-Axis Oriented BiCuSeO Epitaxial Film and Its Thermoelectric Properties |
| YUAN Dachao1,2, GUO Shuang2, HAO Jianjun1, MA Yuejin1, WANG Shufang2
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1 College of Mechanical and Electrical Engineering, Agricultural University of Hebei, Baoding 071001
2 College of Physical Science and Technology, Hebei University, Baoding 071002 |
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Abstract BiCuSeO thin films were prepared on single crystal SrTiO3 substrates by pulsed laser deposition, and the impact of deposition temperature on the crystal structure, micromophology and thermoelectric transport properties of the films was investigated in detail. At the optimal deposition temperature of 330 ℃, pure phase and c-axis oriented BiCuSeO thin films could be obtained, showing a epitaxial relationships between the substrates and the films of [010]SrTiO3∥[010]BiCuSeO and [001]SrTiO3∥[100]BiCuSeO. It could be found from the results of electrical properties test that the film exhibited a metallic-like conducting behavior over range of 20—350 K, with the room temperature resistivity of only 12.5 mΩ·cm, which was much lower than that of the corresponding polycrystalline bulk materials. The calculated room temperature power factor (PF) of the films was about 3.3 μW·cm-1·K-2, which was higher than that of the corresponding polycrystalline bulk materials, indicating a great application prospect of c-axis oriented BiCuSeO epitaxial thin films in the field of thin-film thermoelectric devices.
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Published: 24 January 2019
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| Fund:This project was supported by the National Natural Science Foundation of China (51372064,11703004), the Nature Science Foundation of Hebei Province, China (E2017201227,E2017201209,QN2017017). |
| About author:: Dachao Yuan received her bachelor degree in Material Science and Engineering from Northeast University at Qinhuangdao in 2012, and master degree in Integrated Circuit Engineering from Shanghai University in 2014. She is currently pursuing her Ph.D. at the College of Mechanical and Electrical Engineering, Agricultural University of Hebei, under the supervision of Prof. Yuejin Ma. Her research has focused on thermoelectric thin films.Yuejin Ma received his bachelor degree from Agricultural University of Hebei in 1982, master degree from China Agricultural university in 1995, and Ph.D. degrees in Material Processing Engineering from Tianjin University in 2009. He is currently a full professor and president of the College of Mechanical and Electrical Engineering, Agricultural University of Hebei. His research interests are surface engineering. |
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2019, Vol. 33 
