Microstructure analysis and thermoelectric properties of iron doped CuGaTe2
Chalcopyrite related compounds have attracted much attention in recent years due to their promising thermoelectric properties. In this research we report Fe doping in chalcopyrite-type CuGaTe2 and its influence on structural and thermal transport properties. We synthesized polycrystalline samples wi...
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| Format: | Article |
| Language: | English |
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Elsevier
2018-09-01
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| Series: | Journal of Materiomics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847817300862 |
| _version_ | 1797706526299783168 |
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| author | Fahim Ahmed Naohito Tsujii Takao Mori |
| author_facet | Fahim Ahmed Naohito Tsujii Takao Mori |
| author_sort | Fahim Ahmed |
| collection | DOAJ |
| description | Chalcopyrite related compounds have attracted much attention in recent years due to their promising thermoelectric properties. In this research we report Fe doping in chalcopyrite-type CuGaTe2 and its influence on structural and thermal transport properties. We synthesized polycrystalline samples with composition CuGa1-xFexTe2 with x = 0.0 to 0.05 by spark plasma sintering method. For structural analysis powder X-ray diffraction and electron probe micro analysis were employed. Solubility of Fe in CuGaTe2 was found to be very small, and other phases like FeTe2 and CuTe were identified. Thermal conductivity showed a significant decrease with the addition of Fe up to x = 0.02, which started to increase for x ≥ 0.03. On the other hand, the addition of Fe caused slight increase in the power factor from 1.3 mW/K2m for x = 0.0 to 1.6 mW/K2m for x = 0.02 at T = 770 K. As a result, ZT peak value of 0.92 is recorded for x = 0.02 at 870 K, which corresponds to an enhancement of 60% from that of non-doped CuGaTe2. This work demonstrates that thermoelectric properties of composite materials can be greatly improved by controlling its microstructure. Keywords: Thermoelectric, CuGaTe2, Microstructure, Seebeck coefficient, Thermal conductivity, Composite material |
| first_indexed | 2024-03-12T05:53:37Z |
| format | Article |
| id | doaj.art-8adb5efa4fc449f78a5c983127ec1ffe |
| institution | Directory Open Access Journal |
| issn | 2352-8478 |
| language | English |
| last_indexed | 2024-03-12T05:53:37Z |
| publishDate | 2018-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materiomics |
| spelling | doaj.art-8adb5efa4fc449f78a5c983127ec1ffe2023-09-03T04:54:05ZengElsevierJournal of Materiomics2352-84782018-09-0143221227Microstructure analysis and thermoelectric properties of iron doped CuGaTe2Fahim Ahmed0Naohito Tsujii1Takao Mori2International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan; Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, JapanInternational Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan; Corresponding author.International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan; Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan; Corresponding author. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan.Chalcopyrite related compounds have attracted much attention in recent years due to their promising thermoelectric properties. In this research we report Fe doping in chalcopyrite-type CuGaTe2 and its influence on structural and thermal transport properties. We synthesized polycrystalline samples with composition CuGa1-xFexTe2 with x = 0.0 to 0.05 by spark plasma sintering method. For structural analysis powder X-ray diffraction and electron probe micro analysis were employed. Solubility of Fe in CuGaTe2 was found to be very small, and other phases like FeTe2 and CuTe were identified. Thermal conductivity showed a significant decrease with the addition of Fe up to x = 0.02, which started to increase for x ≥ 0.03. On the other hand, the addition of Fe caused slight increase in the power factor from 1.3 mW/K2m for x = 0.0 to 1.6 mW/K2m for x = 0.02 at T = 770 K. As a result, ZT peak value of 0.92 is recorded for x = 0.02 at 870 K, which corresponds to an enhancement of 60% from that of non-doped CuGaTe2. This work demonstrates that thermoelectric properties of composite materials can be greatly improved by controlling its microstructure. Keywords: Thermoelectric, CuGaTe2, Microstructure, Seebeck coefficient, Thermal conductivity, Composite materialhttp://www.sciencedirect.com/science/article/pii/S2352847817300862 |
| spellingShingle | Fahim Ahmed Naohito Tsujii Takao Mori Microstructure analysis and thermoelectric properties of iron doped CuGaTe2 Journal of Materiomics |
| title | Microstructure analysis and thermoelectric properties of iron doped CuGaTe2 |
| title_full | Microstructure analysis and thermoelectric properties of iron doped CuGaTe2 |
| title_fullStr | Microstructure analysis and thermoelectric properties of iron doped CuGaTe2 |
| title_full_unstemmed | Microstructure analysis and thermoelectric properties of iron doped CuGaTe2 |
| title_short | Microstructure analysis and thermoelectric properties of iron doped CuGaTe2 |
| title_sort | microstructure analysis and thermoelectric properties of iron doped cugate2 |
| url | http://www.sciencedirect.com/science/article/pii/S2352847817300862 |
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