Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentration
Polycrystalline Mn1-xCuxTe (x = 0, 0.025, 0.05, 0.075) thermoelectric materials were prepared by a combined method of melt-quenching and hot press. The effect of Cu doping on the electrical resistivity, band gap, the Seebeck coefficient and thermal conductivity was investigated. The power factors of...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2016-06-01
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| Series: | Journal of Materiomics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847816300107 |
| _version_ | 1797724826417233920 |
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| author | Yangyang Ren Qinghui Jiang Junyou Yang Yubo Luo Dan Zhang Yudong Cheng Zhiwei Zhou |
| author_facet | Yangyang Ren Qinghui Jiang Junyou Yang Yubo Luo Dan Zhang Yudong Cheng Zhiwei Zhou |
| author_sort | Yangyang Ren |
| collection | DOAJ |
| description | Polycrystalline Mn1-xCuxTe (x = 0, 0.025, 0.05, 0.075) thermoelectric materials were prepared by a combined method of melt-quenching and hot press. The effect of Cu doping on the electrical resistivity, band gap, the Seebeck coefficient and thermal conductivity was investigated. The power factors of the Cu-doped samples increase greatly due to the decrease of electrical resistivity and the higher Seebeck coefficient in high temperatures. In addition, the thermal conductivities of the Cu-doped samples also reduce due to the extra phonon scattering from the point defects introduced by Cu doping. As a result, the thermoelectric performance of MnTe is greatly enhanced, and a maximum ZT value of ∼0.55 in the Mn0.925Cu0.075Te sample at 773 K is achieved, which is 35% greater than that of the pristine MnTe sample. |
| first_indexed | 2024-03-12T10:22:23Z |
| format | Article |
| id | doaj.art-2141292d80fb49f990527584f26fcef8 |
| institution | Directory Open Access Journal |
| issn | 2352-8478 |
| language | English |
| last_indexed | 2024-03-12T10:22:23Z |
| publishDate | 2016-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materiomics |
| spelling | doaj.art-2141292d80fb49f990527584f26fcef82023-09-02T10:00:20ZengElsevierJournal of Materiomics2352-84782016-06-012217217810.1016/j.jmat.2016.05.008Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentrationYangyang RenQinghui JiangJunyou YangYubo LuoDan ZhangYudong ChengZhiwei ZhouPolycrystalline Mn1-xCuxTe (x = 0, 0.025, 0.05, 0.075) thermoelectric materials were prepared by a combined method of melt-quenching and hot press. The effect of Cu doping on the electrical resistivity, band gap, the Seebeck coefficient and thermal conductivity was investigated. The power factors of the Cu-doped samples increase greatly due to the decrease of electrical resistivity and the higher Seebeck coefficient in high temperatures. In addition, the thermal conductivities of the Cu-doped samples also reduce due to the extra phonon scattering from the point defects introduced by Cu doping. As a result, the thermoelectric performance of MnTe is greatly enhanced, and a maximum ZT value of ∼0.55 in the Mn0.925Cu0.075Te sample at 773 K is achieved, which is 35% greater than that of the pristine MnTe sample.http://www.sciencedirect.com/science/article/pii/S2352847816300107MnTeThermoelectric materialsDopingCarrier concentration |
| spellingShingle | Yangyang Ren Qinghui Jiang Junyou Yang Yubo Luo Dan Zhang Yudong Cheng Zhiwei Zhou Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentration Journal of Materiomics MnTe Thermoelectric materials Doping Carrier concentration |
| title | Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentration |
| title_full | Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentration |
| title_fullStr | Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentration |
| title_full_unstemmed | Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentration |
| title_short | Enhanced thermoelectric performance of MnTe via Cu doping with optimized carrier concentration |
| title_sort | enhanced thermoelectric performance of mnte via cu doping with optimized carrier concentration |
| topic | MnTe Thermoelectric materials Doping Carrier concentration |
| url | http://www.sciencedirect.com/science/article/pii/S2352847816300107 |
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