Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric properties
<p>It is common sense that a phase interface (or grain boundary) could be used to scatter phonons in thermoelectric (TE) materials, resulting in low thermal conductivity (<italic>κ</italic>). However, a large number of impurity phases are always so harmful to the transport of carri...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Tsinghua University Press
2023-08-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2023.9220768 |
| _version_ | 1797662617235357696 |
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| author | Wenpei Li Zhonghai Yu Chengyan Liu Ying Peng Baoquan Feng Jie Gao Guojing Wu Xiaobo Bai Junliang Chen Xiaoyang Wang Lei Miao |
| author_facet | Wenpei Li Zhonghai Yu Chengyan Liu Ying Peng Baoquan Feng Jie Gao Guojing Wu Xiaobo Bai Junliang Chen Xiaoyang Wang Lei Miao |
| author_sort | Wenpei Li |
| collection | DOAJ |
| description | <p>It is common sense that a phase interface (or grain boundary) could be used to scatter phonons in thermoelectric (TE) materials, resulting in low thermal conductivity (<italic>κ</italic>). However, a large number of impurity phases are always so harmful to the transport of carriers that poor TE performance is obtained. Here, we demonstrate that numerous superior multiphase (AgCuTe, Ag<sub>2</sub>Te, copper telluride (Cu<sub>2</sub>Te and Cu<sub>2−<italic>x</italic></sub>Te), and nickel telluride (NiTe)) interfaces with simultaneous strong phonon scattering and weak electron scattering could be realized in AgCuTe-based TE materials. Owing to the similar chemical bonds in these phases, the depletion region at phase interfaces, which acts as carrier scattering centers, could be ignored. Therefore, the power factor (PF) is obviously enhanced from ~609 to ~832 μW·m<sup>−1</sup>·K<sup>−2</sup>, and <italic>κ</italic> is simultaneously decreased from ~0.52 to ~0.43 W·m<sup>−1</sup>·K<sup>−1</sup> at 636 K. Finally, a peak figure of merit (<italic>zT</italic>) of ~1.23 at 636 K and an average <italic>zT</italic> (<italic>zT</italic><sub>avg</sub>) of ~1.12 in the temperature range of 523–623 K are achieved, which are one of the best values among the AgCuTe-based TE materials. This study could provide new guidance to enhance the performance by designing superior multiphase interfaces in the TE materials.</p> |
| first_indexed | 2024-03-11T19:02:50Z |
| format | Article |
| id | doaj.art-dc080bab1c364f25b6fe54ae4cd28828 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-11T19:02:50Z |
| publishDate | 2023-08-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-dc080bab1c364f25b6fe54ae4cd288282023-10-10T11:18:12ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082023-08-011281511152010.26599/JAC.2023.9220768Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric propertiesWenpei Li0Zhonghai Yu1Chengyan Liu2Ying Peng3Baoquan Feng4Jie Gao5Guojing Wu6Xiaobo Bai7Junliang Chen8Xiaoyang Wang9Lei Miao10Guangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Precision Navigation Technology and Application, School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China<p>It is common sense that a phase interface (or grain boundary) could be used to scatter phonons in thermoelectric (TE) materials, resulting in low thermal conductivity (<italic>κ</italic>). However, a large number of impurity phases are always so harmful to the transport of carriers that poor TE performance is obtained. Here, we demonstrate that numerous superior multiphase (AgCuTe, Ag<sub>2</sub>Te, copper telluride (Cu<sub>2</sub>Te and Cu<sub>2−<italic>x</italic></sub>Te), and nickel telluride (NiTe)) interfaces with simultaneous strong phonon scattering and weak electron scattering could be realized in AgCuTe-based TE materials. Owing to the similar chemical bonds in these phases, the depletion region at phase interfaces, which acts as carrier scattering centers, could be ignored. Therefore, the power factor (PF) is obviously enhanced from ~609 to ~832 μW·m<sup>−1</sup>·K<sup>−2</sup>, and <italic>κ</italic> is simultaneously decreased from ~0.52 to ~0.43 W·m<sup>−1</sup>·K<sup>−1</sup> at 636 K. Finally, a peak figure of merit (<italic>zT</italic>) of ~1.23 at 636 K and an average <italic>zT</italic> (<italic>zT</italic><sub>avg</sub>) of ~1.12 in the temperature range of 523–623 K are achieved, which are one of the best values among the AgCuTe-based TE materials. This study could provide new guidance to enhance the performance by designing superior multiphase interfaces in the TE materials.</p>https://www.sciopen.com/article/10.26599/JAC.2023.9220768thermoelectric (te) materialsagcutephase interfacecarrier scatteringphonon scattering |
| spellingShingle | Wenpei Li Zhonghai Yu Chengyan Liu Ying Peng Baoquan Feng Jie Gao Guojing Wu Xiaobo Bai Junliang Chen Xiaoyang Wang Lei Miao Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric properties Journal of Advanced Ceramics thermoelectric (te) materials agcute phase interface carrier scattering phonon scattering |
| title | Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric properties |
| title_full | Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric properties |
| title_fullStr | Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric properties |
| title_full_unstemmed | Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric properties |
| title_short | Superior multiphase interfaces in AgCuTe-based composite with significantly enhanced thermoelectric properties |
| title_sort | superior multiphase interfaces in agcute based composite with significantly enhanced thermoelectric properties |
| topic | thermoelectric (te) materials agcute phase interface carrier scattering phonon scattering |
| url | https://www.sciopen.com/article/10.26599/JAC.2023.9220768 |
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