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Synthesis and Thermal Instability of High-Quality Bi2Te3/Sb2Te3 Super lattice Thin Film Thermoelectrics.
Hansen, Anna-Lena, Dankwort, Torben, Winkler, Markus, Ditto, Jeffrey, Johnson, Dave C., Koenig, Jan D., Bartholome, Kilian, Kienle, Lorenz and Bensch, Wolfgang (2014) Synthesis and Thermal Instability of High-Quality Bi2Te3/Sb2Te3 Super lattice Thin Film Thermoelectrics. Chemistry of Materials, 26 (22). pp. 6518-6522. DOI 10.1021/cm5031574.
Full text not available from this repository.Abstract
The quality and temperature stability of 1 nm Bi2Te3/5 nm Sb2Te3 superlattices prepared by molecular beam epitaxy for the first time was investigated by in situ and ex situ X-ray diffraction and transmission electron microscopy. Upon heating, the superlattice structures are not stable against interdiffusion of the components, with micro- and nanostructural changes occurring at temperatures as low as 200 degrees C. The interdiffusion preferably starts next to superlattice defects. At 300 degrees C the Bi2Te3 and Sb2Te3 layers were mostly interdiffused, forming the thermodynamically stable Sb1.66Bi0.33Te3 alloy. The data suggests that structural integrity of Bi2Te3/Sb2Te3 superlattices will not be stable for extended times above 200 degrees C, thus inhibiting application of such superlattices over a wide temperature range.
Document Type: | Article |
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Additional Information: | Times Cited: 0 0 |
Research affiliation: | Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence Kiel University |
Refereed: | Yes |
Open Access Journal?: | No |
Publisher: | American Chemical Society |
Projects: | Future Ocean |
Date Deposited: | 30 Mar 2015 12:18 |
Last Modified: | 23 Aug 2019 08:54 |
URI: | https://oceanrep.geomar.de/id/eprint/27706 |
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