Partial capture and effective modulation of the high-pressure thermoelectric properties of PbSe via high pressure synthesis
| Autor: | Hongan Ma, Jiaxiang Chen, Guangyao Ji, Haiqiang Liu, Xiaopeng Jia, Baomin Liu, Yuewen Zhang |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Band gap Mechanical Engineering Metals and Alloys Thermodynamics 02 engineering and technology Power factor 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Mechanics of Materials Modulation Electrical resistivity and conductivity Seebeck coefficient High pressure Thermoelectric effect Materials Chemistry 0210 nano-technology Ambient pressure |
| Zdroj: | Journal of Alloys and Compounds. 789:881-886 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.03.097 |
| Popis: | This study investigated the relationship of synthesis pressure and corresponding thermoelectric parameters of PbSe. These thermoelectric parameters include the energy gap (Eg), resistivity (R), and the Seebeck coefficient (S). The variation tendency of these parameters with synthesis pressure is similar to the in-situ measurement results of the measurement pressure dependence of Eg, R, and S. Moreover, high-pressure synthesis achieved the best power factor with sample synthesized at 1.5 GPa synthesis pressure. With regard to the high pressure in-situ measurement of PbSe, there is a possible best measurement pressure interval. The 1.5 GPa (synthesis pressure) here is consistent with the “best pressure interval”. These results indicate that high-temperature and high-pressure synthesis is able to capture partial high pressure features of PbSe to the ambient pressure. Despite several innovative properties of PbSe in the high-pressure environment, it does not have direct applied value for the ambient pressure state. However, the high-pressure synthesis, perhaps, could provide an alternative way. |
| Databáze: | OpenAIRE |
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