Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/74965
Title: | Enhanced thermoelectric properties of SnSe thin films grown by pulsed laser glancing-angle deposition | Authors: | Suen, CH Shi, D Su, Y Zhang, Z Chan, CH Tang, X Li, Y Lam, KH Chen, X Huang, BL Zhou, XY Dai, JY |
Issue Date: | Dec-2017 | Source: | Journal of materiomics, Dec, 2017, v. 3, no. 4, p. 293-298 | Abstract: | SnSe single crystals have been demonstrated to possess excellent thermoelectric properties. In this work, we demonstrate a grain size control method in growing nanocrystalline SnSe thin films through a glancing angle pulsed-laser deposition approach. Structural characterization reveals that the SnSe film deposited at a normal angle has a preferred orientation along a axis, while by contrast, the SnSe film deposited at an 80° glancing angle develops a nanopillar structure with the growth direction towards the incident atomic flux. The glancing angle deposition greatly reduces the grain size of the thin film due to a shadowing effect to the adatoms, resulting in significantly increased power factor for more than 100%. The maximum Seebeck coefficient and power factor are 498.5μV/K and 18.5μWcm−1K−2, respectively. The enhancement of thermoelectric property can be attributed to the potential barrier scattering at grain boundaries owing to the reduced grain size and increased grain boundaries in the film. Given this enhanced power factor, and considering the fact that the nanopillar structure should have much lower thermal conductivity than a plain film, the zT value of such made SnSe film could be significantly larger than the corresponding single crystal film, making it a good candidate for thin film-based thermoelectric device. | Keywords: | Glancing angle Potential barrier scattering SnSe Thermoelectric |
Publisher: | Chinese Ceramic Society | Journal: | Journal of materiomics | ISSN: | 2352-8478 | DOI: | 10.1016/j.jmat.2017.05.001 | Rights: | © 2017 The Chinese Ceramic Society. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). The following publication Suen, C. H., Shi, D., Su, Y., Zhang, Z., Chan, C. H., Tang, X., . . . Dai, J. -. (2017). Enhanced thermoelectric properties of SnSe thin films grown by pulsed laser glancing-angle deposition. Journal of Materiomics, 3(4), 293-298 is available at https://dx.doi.org/10.1016/j.jmat.2017.05.001 |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Suen_SnSe_Thin_Films.pdf | 1.41 MB | Adobe PDF | View/Open |
Page views
151
Last Week
3
3
Last month
Citations as of May 5, 2024
Downloads
56
Citations as of May 5, 2024
SCOPUSTM
Citations
47
Last Week
0
0
Last month
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
46
Last Week
0
0
Last month
Citations as of Feb 22, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.