Manifestation of the structural stability of Mg-doped Zn4Sb3 via atomic fine structure investigation
| Autor: | Kongchao Shen, Shaomin Feng, Haoliang Sun, Yingguo Yang, Fei Song, Zhonghong Jiang, Yingxia Wang, Gengwu Ji, J. Q. Li |
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| Rok vydání: | 2017 |
| Předmět: |
Absorption spectroscopy
Scanning electron microscope business.industry Chemistry Magnesium Doping Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Thermoelectric materials 01 natural sciences 0104 chemical sciences X-ray absorption fine structure Semiconductor Materials Chemistry Thermal stability 0210 nano-technology business |
| Zdroj: | Solid State Communications. 261:26-31 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/j.ssc.2017.05.024 |
| Popis: | The structural stability is crucially important for thermoelectric material from the point view of energy harvesting applications. Herein, p-type Zn-Sb semiconductor doped with magnesium (Mg 0.04 Zn 3.96 Sb 3 ) was experimentally investigated after thermal cycles to verify its structure stability, via a combination of synchrotron-based X-ray absorption spectroscopy (XAFS), grazing-incidence X-ray diffraction (GI-XRD), scanning electron microscopy (SEM), and energy dispersive spectrometer (EDS). While no visible structure change was discovered from XRD measurement after annealed to 573 K in air, well-preserved atomic structure of Mg-doped Zn-Sb was also demonstrated by XAFS. Interestingly, SEM indicated significantly improved surface morphology whilst EDS clearly showed the relative steadiness of each element's spatial distribution on surface. On basis of these findings, it was concluded in the end that the doping of magnesium substantially improves the thermal stability of zinc-antimonite compounds, and the possible mechanism underneath was also demonstrated. |
| Databáze: | OpenAIRE |
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