Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materials
The previous works commonly adjust the carrier concentration through acceptor doping, but at the same time, the decrease of the Seebeck coefficient limits the further improvement of electrical properties in Cu3SbSe4-based materials. In this work, a microwave-assisted hydrothermal synthesis method wa...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-09-01
|
| Series: | Journal of Materiomics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847822000557 |
| _version_ | 1797756506742980608 |
|---|---|
| author | Sitong Wei Boyi Wang Zipei Zhang Wenhao Li Lu Yu Shikai Wei Zhen Ji Weiyu Song Shuqi Zheng |
| author_facet | Sitong Wei Boyi Wang Zipei Zhang Wenhao Li Lu Yu Shikai Wei Zhen Ji Weiyu Song Shuqi Zheng |
| author_sort | Sitong Wei |
| collection | DOAJ |
| description | The previous works commonly adjust the carrier concentration through acceptor doping, but at the same time, the decrease of the Seebeck coefficient limits the further improvement of electrical properties in Cu3SbSe4-based materials. In this work, a microwave-assisted hydrothermal synthesis method was used to synthesize Cu3SbSe4/TiO2 hollow microspheres. Part of TiO2 participates in the reaction, replaces the Sb site of Cu3SbSe4 to form holes, and the rest is dispersed in the matrix in the form of the second phase. The first-principles calculations reveal that the doping of Ti significantly changes the band structure and phonon spectrum, thereby regulating carrier concentration while increasing phonon scattering. In addition, experimental results show that the energy filtering effect generated by the extra-mixed TiO2 nano particles, which suppresses the decrease of Seebeck coefficient by acceptor doping. Consequently, the highest average power factor 897.5 μW m−1 K−2 and the zT peak value of 0.70 can be obtained in Cu3SbSe4/6%TiO2 sample at 298–623 K. This work provides a new sight to improve the thermoelectric properties in Cu3SbSe4 through carrier concentration regulation and nano-phase composition. |
| first_indexed | 2024-03-12T18:02:30Z |
| format | Article |
| id | doaj.art-6c2f52abb366403e8dde48a04f34e703 |
| institution | Directory Open Access Journal |
| issn | 2352-8478 |
| language | English |
| last_indexed | 2024-03-12T18:02:30Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materiomics |
| spelling | doaj.art-6c2f52abb366403e8dde48a04f34e7032023-08-02T09:34:30ZengElsevierJournal of Materiomics2352-84782022-09-0185929936Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materialsSitong Wei0Boyi Wang1Zipei Zhang2Wenhao Li3Lu Yu4Shikai Wei5Zhen Ji6Weiyu Song7Shuqi Zheng8College of New Energy and Materials, China University of Petroleum, Beijing, 102249, ChinaBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, ChinaCollege of New Energy and Materials, China University of Petroleum, Beijing, 102249, ChinaCollege of New Energy and Materials, China University of Petroleum, Beijing, 102249, ChinaCollege of New Energy and Materials, China University of Petroleum, Beijing, 102249, ChinaCollege of New Energy and Materials, China University of Petroleum, Beijing, 102249, ChinaCollege of New Energy and Materials, China University of Petroleum, Beijing, 102249, ChinaCollege of Science, China University of Petroleum, Beijing, 102249, ChinaCollege of New Energy and Materials, China University of Petroleum, Beijing, 102249, China; Corresponding author.The previous works commonly adjust the carrier concentration through acceptor doping, but at the same time, the decrease of the Seebeck coefficient limits the further improvement of electrical properties in Cu3SbSe4-based materials. In this work, a microwave-assisted hydrothermal synthesis method was used to synthesize Cu3SbSe4/TiO2 hollow microspheres. Part of TiO2 participates in the reaction, replaces the Sb site of Cu3SbSe4 to form holes, and the rest is dispersed in the matrix in the form of the second phase. The first-principles calculations reveal that the doping of Ti significantly changes the band structure and phonon spectrum, thereby regulating carrier concentration while increasing phonon scattering. In addition, experimental results show that the energy filtering effect generated by the extra-mixed TiO2 nano particles, which suppresses the decrease of Seebeck coefficient by acceptor doping. Consequently, the highest average power factor 897.5 μW m−1 K−2 and the zT peak value of 0.70 can be obtained in Cu3SbSe4/6%TiO2 sample at 298–623 K. This work provides a new sight to improve the thermoelectric properties in Cu3SbSe4 through carrier concentration regulation and nano-phase composition.http://www.sciencedirect.com/science/article/pii/S2352847822000557Cu3SbSe4/Nano-TiO2Energy filtering effectThermoelectricSynergistic modulation |
| spellingShingle | Sitong Wei Boyi Wang Zipei Zhang Wenhao Li Lu Yu Shikai Wei Zhen Ji Weiyu Song Shuqi Zheng Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materials Journal of Materiomics Cu3SbSe4/Nano-TiO2 Energy filtering effect Thermoelectric Synergistic modulation |
| title | Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materials |
| title_full | Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materials |
| title_fullStr | Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materials |
| title_full_unstemmed | Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materials |
| title_short | Achieving high thermoelectric performance through carrier concentration optimization and energy filtering in Cu3SbSe4-based materials |
| title_sort | achieving high thermoelectric performance through carrier concentration optimization and energy filtering in cu3sbse4 based materials |
| topic | Cu3SbSe4/Nano-TiO2 Energy filtering effect Thermoelectric Synergistic modulation |
| url | http://www.sciencedirect.com/science/article/pii/S2352847822000557 |
| work_keys_str_mv | AT sitongwei achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT boyiwang achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT zipeizhang achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT wenhaoli achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT luyu achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT shikaiwei achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT zhenji achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT weiyusong achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials AT shuqizheng achievinghighthermoelectricperformancethroughcarrierconcentrationoptimizationandenergyfilteringincu3sbse4basedmaterials |