Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterials
In this paper, we reported the cerium (Ce) doped thermoelectric materials with composition Bi2−xRxTe3 (R = Ce, x = 0.0, 0.1, and 0.2), which were prepared by using different wet chemical methods. The selected synthesis methods that were used included a simplified sol-gel method (Without Water and Su...
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Elsevier
2023-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423001552 |
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| author | Faisal Ghafoor Bilal Ghafoor Deok-kee Kim Muhammad Farooq Khan M. Anis-ur-Rehman |
| author_facet | Faisal Ghafoor Bilal Ghafoor Deok-kee Kim Muhammad Farooq Khan M. Anis-ur-Rehman |
| author_sort | Faisal Ghafoor |
| collection | DOAJ |
| description | In this paper, we reported the cerium (Ce) doped thermoelectric materials with composition Bi2−xRxTe3 (R = Ce, x = 0.0, 0.1, and 0.2), which were prepared by using different wet chemical methods. The selected synthesis methods that were used included a simplified sol-gel method (Without Water and Surfactants-WOWS) and the Composite Mediated Hydrothermal Method (CMHM). The structural analysis of the samples showed rhombohedral and hexagonal structures. In addition, the surface morphology revealed a flower-like structure for the synthesized samples. The thermal stability was determined using differential scanning calorimetry and thermogravimetric analysis. The electrical conductivity of the samples with a doping ratio of x = 0.1 showed maximum conductivity of (19.10 × 103 (S/cm))-WOWS; (9.10 × 103 (S/cm)) – (CMHM) as compared to than that of other samples (x = 0.0 and 0.2). Interestingly, the doping of Ce increased the Seebeck effect, which also increased the power factor. The power factor of the samples x = 0.1 was higher than that of the undoped samples, which had a magnitude of 12.30 μW/cm.K2 (WOWS) and 7.02 μW/cm.K2 (CMHM). Moreover, we measured the thermal conductivity of the samples using the Advantageous Transient Plane Source (ATPS) method. Therefore, we found the higher figure of merit (ZT) value (0.41) at x = 0.1, which was prepared using a simplified sol-gel method, which is among the highest values that was reported for Bi2−xRxTe3 at room temperature. Because of its potential applications this material has great interest as a thermoelectric material and chip cooling sensing. |
| first_indexed | 2024-04-09T21:19:12Z |
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| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-09T21:19:12Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2945fd7d854f4363b40e90c6ada4942a2023-03-28T06:46:24ZengElsevierJournal of Materials Research and Technology2238-78542023-03-012336173625Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterialsFaisal Ghafoor0Bilal Ghafoor1Deok-kee Kim2Muhammad Farooq Khan3M. Anis-ur-Rehman4Applied Thermal Physics Laboratory, Department of Physics, COMSATS University Islamabad, Islamabad 45550, Pakistan; Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, South KoreaFederal University of Rio Grande Do Sul, Porto Alegre, BrazilDepartment of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, South KoreaDepartment of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, South Korea; Corresponding author.Applied Thermal Physics Laboratory, Department of Physics, COMSATS University Islamabad, Islamabad 45550, Pakistan; Corresponding author.In this paper, we reported the cerium (Ce) doped thermoelectric materials with composition Bi2−xRxTe3 (R = Ce, x = 0.0, 0.1, and 0.2), which were prepared by using different wet chemical methods. The selected synthesis methods that were used included a simplified sol-gel method (Without Water and Surfactants-WOWS) and the Composite Mediated Hydrothermal Method (CMHM). The structural analysis of the samples showed rhombohedral and hexagonal structures. In addition, the surface morphology revealed a flower-like structure for the synthesized samples. The thermal stability was determined using differential scanning calorimetry and thermogravimetric analysis. The electrical conductivity of the samples with a doping ratio of x = 0.1 showed maximum conductivity of (19.10 × 103 (S/cm))-WOWS; (9.10 × 103 (S/cm)) – (CMHM) as compared to than that of other samples (x = 0.0 and 0.2). Interestingly, the doping of Ce increased the Seebeck effect, which also increased the power factor. The power factor of the samples x = 0.1 was higher than that of the undoped samples, which had a magnitude of 12.30 μW/cm.K2 (WOWS) and 7.02 μW/cm.K2 (CMHM). Moreover, we measured the thermal conductivity of the samples using the Advantageous Transient Plane Source (ATPS) method. Therefore, we found the higher figure of merit (ZT) value (0.41) at x = 0.1, which was prepared using a simplified sol-gel method, which is among the highest values that was reported for Bi2−xRxTe3 at room temperature. Because of its potential applications this material has great interest as a thermoelectric material and chip cooling sensing.http://www.sciencedirect.com/science/article/pii/S2238785423001552ThermoelectricBi2−xRxTe3Simplified sol-gel method (WOWS)Composite mediated hydrothermal method (CMHM)Seebeck coefficientZT = figure of merit |
| spellingShingle | Faisal Ghafoor Bilal Ghafoor Deok-kee Kim Muhammad Farooq Khan M. Anis-ur-Rehman Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterials Journal of Materials Research and Technology Thermoelectric Bi2−xRxTe3 Simplified sol-gel method (WOWS) Composite mediated hydrothermal method (CMHM) Seebeck coefficient ZT = figure of merit |
| title | Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterials |
| title_full | Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterials |
| title_fullStr | Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterials |
| title_full_unstemmed | Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterials |
| title_short | Enhancement in figure of merit in N-type Bi(R)-Te thermoelectric nanomaterials |
| title_sort | enhancement in figure of merit in n type bi r te thermoelectric nanomaterials |
| topic | Thermoelectric Bi2−xRxTe3 Simplified sol-gel method (WOWS) Composite mediated hydrothermal method (CMHM) Seebeck coefficient ZT = figure of merit |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423001552 |
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