Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer
Thermoelectric figure-of-merit (ZT) of ∼1.6 at 700 °C is achieved in β-phase copper selenide (Cu2Se) made by ball milling and hot pressing. The β-phase of such material possesses a natural superlattice-like structure that combines ordered selenium (Se) and disordered copper (Cu) layers in its unit c...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2017
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| Online Access: | http://hdl.handle.net/1721.1/110574 https://orcid.org/0000-0002-3968-8530 |
| _version_ | 1826206357308571648 |
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| author | Yu, Bo Liu, Weishu Chen, Shuo Wang, Hui Wang, Hengzhi Chen, Gang Ren, Zhifeng |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Yu, Bo Liu, Weishu Chen, Shuo Wang, Hui Wang, Hengzhi Chen, Gang Ren, Zhifeng |
| author_sort | Yu, Bo |
| collection | MIT |
| description | Thermoelectric figure-of-merit (ZT) of ∼1.6 at 700 °C is achieved in β-phase copper selenide (Cu2Se) made by ball milling and hot pressing. The β-phase of such material possesses a natural superlattice-like structure that combines ordered selenium (Se) and disordered copper (Cu) layers in its unit cell, resulting in a low lattice thermal conductivity of 0.4–0.5 W m−1 K−1. A λ-shaped specific heat peak indicates a phase transition from cubic β-phase to tetragonal α-phase at around 140 °C upon cooling and vice versa. An abnormal decrease in specific heat with increasing temperature was also observed due to the increased random motion of disordered Cu atoms. These features indicate that β-phase Cu[subscript 2]Se could be potentially an interesting thermoelectric material, competing with other conventional thermoelectric materials. |
| first_indexed | 2024-09-23T13:28:12Z |
| format | Article |
| id | mit-1721.1/110574 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:28:12Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1105742022-10-01T15:29:42Z Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer Yu, Bo Liu, Weishu Chen, Shuo Wang, Hui Wang, Hengzhi Chen, Gang Ren, Zhifeng Massachusetts Institute of Technology. Department of Mechanical Engineering Chen, Gang Yu, Bo Chen, Shuo Chen, Gang Thermoelectric figure-of-merit (ZT) of ∼1.6 at 700 °C is achieved in β-phase copper selenide (Cu2Se) made by ball milling and hot pressing. The β-phase of such material possesses a natural superlattice-like structure that combines ordered selenium (Se) and disordered copper (Cu) layers in its unit cell, resulting in a low lattice thermal conductivity of 0.4–0.5 W m−1 K−1. A λ-shaped specific heat peak indicates a phase transition from cubic β-phase to tetragonal α-phase at around 140 °C upon cooling and vice versa. An abnormal decrease in specific heat with increasing temperature was also observed due to the increased random motion of disordered Cu atoms. These features indicate that β-phase Cu[subscript 2]Se could be potentially an interesting thermoelectric material, competing with other conventional thermoelectric materials. 2017-07-10T14:30:57Z 2017-07-10T14:30:57Z 2012-03 2012-02 Article http://purl.org/eprint/type/JournalArticle 22112855 http://hdl.handle.net/1721.1/110574 Yu, Bo, Weishu Liu, Shuo Chen, Hui Wang, Hengzhi Wang, Gang Chen, and Zhifeng Ren. “Thermoelectric Properties of Copper Selenide with Ordered Selenium Layer and Disordered Copper Layer.” Nano Energy 1, no. 3 (May 2012): 472–478. doi:10.1016/j.nanoen.2012.02.010. https://orcid.org/0000-0002-3968-8530 en_US http://dx.doi.org/10.1016/j.nanoen.2012.02.010 Nano Energy Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Gang Chen |
| spellingShingle | Yu, Bo Liu, Weishu Chen, Shuo Wang, Hui Wang, Hengzhi Chen, Gang Ren, Zhifeng Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer |
| title | Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer |
| title_full | Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer |
| title_fullStr | Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer |
| title_full_unstemmed | Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer |
| title_short | Thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer |
| title_sort | thermoelectric properties of copper selenide with ordered selenium layer and disordered copper layer |
| url | http://hdl.handle.net/1721.1/110574 https://orcid.org/0000-0002-3968-8530 |
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