Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion
Bismuth tellurides is one of the most promising thermoelectric (TE) material candidates in low-temperature application circumstances, but the n-type thermoelectric property is relatively low compared to the p-type counterpart and still needs to be improved. Herein, we incorporated different copper s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/23/8183 |
| _version_ | 1797462677734293504 |
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| author | Longbin Li Jianchao Jia Chaosheng Shi Wei Zeng |
| author_facet | Longbin Li Jianchao Jia Chaosheng Shi Wei Zeng |
| author_sort | Longbin Li |
| collection | DOAJ |
| description | Bismuth tellurides is one of the most promising thermoelectric (TE) material candidates in low-temperature application circumstances, but the n-type thermoelectric property is relatively low compared to the p-type counterpart and still needs to be improved. Herein, we incorporated different copper selenides (CuSe, Cu<sub>3</sub>Se<sub>2</sub> and Cu<sub>2−x</sub>Se) into a Bi<sub>2</sub>Te<sub>3</sub> matrix to create the alloy by grinding and successive sintering to enable higher thermoelectric performance. The results demonstrated that all alloys achieved n-type TE characteristics and Bi<sub>2</sub>Te<sub>3</sub>-CuSe exhibited the best Seebeck coefficient and power factor among them. Along with the low thermal conductivity, the maximum dimensionless TE figure of merit (ZT) value of 1.64 at 573 K was delivered for Bi<sub>2</sub>Te<sub>3</sub>-CuSe alloy, which is among the best reported results in the n-type Bi<sub>2</sub>Te<sub>3</sub>-based TE materials to the best of our knowledge. The improved TE properties should be related to the co-doping process of Se and Cu. Our investigation shows a new method to enhance the performance of n-type TE materials by appropriate co-doping or alloying. |
| first_indexed | 2024-03-09T17:40:02Z |
| format | Article |
| id | doaj.art-cd6035f6910548edbfa61981f14d0765 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T17:40:02Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-cd6035f6910548edbfa61981f14d07652023-11-24T11:38:02ZengMDPI AGMolecules1420-30492022-11-012723818310.3390/molecules27238183Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric ConversionLongbin Li0Jianchao Jia1Chaosheng Shi2Wei Zeng3Flexible Sensing Technology Research Center, Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, ChinaFlexible Sensing Technology Research Center, Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, ChinaFlexible Sensing Technology Research Center, Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, ChinaFlexible Sensing Technology Research Center, Guangdong Provincial Key Laboratory of Industrial Surfactant, Institute of Chemical Engineering, Guangdong Academy of Sciences, Guangzhou 510665, ChinaBismuth tellurides is one of the most promising thermoelectric (TE) material candidates in low-temperature application circumstances, but the n-type thermoelectric property is relatively low compared to the p-type counterpart and still needs to be improved. Herein, we incorporated different copper selenides (CuSe, Cu<sub>3</sub>Se<sub>2</sub> and Cu<sub>2−x</sub>Se) into a Bi<sub>2</sub>Te<sub>3</sub> matrix to create the alloy by grinding and successive sintering to enable higher thermoelectric performance. The results demonstrated that all alloys achieved n-type TE characteristics and Bi<sub>2</sub>Te<sub>3</sub>-CuSe exhibited the best Seebeck coefficient and power factor among them. Along with the low thermal conductivity, the maximum dimensionless TE figure of merit (ZT) value of 1.64 at 573 K was delivered for Bi<sub>2</sub>Te<sub>3</sub>-CuSe alloy, which is among the best reported results in the n-type Bi<sub>2</sub>Te<sub>3</sub>-based TE materials to the best of our knowledge. The improved TE properties should be related to the co-doping process of Se and Cu. Our investigation shows a new method to enhance the performance of n-type TE materials by appropriate co-doping or alloying.https://www.mdpi.com/1420-3049/27/23/8183bismuth telluridecopper selenidealloyn-type thermoelectric material |
| spellingShingle | Longbin Li Jianchao Jia Chaosheng Shi Wei Zeng Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion Molecules bismuth telluride copper selenide alloy n-type thermoelectric material |
| title | Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion |
| title_full | Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion |
| title_fullStr | Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion |
| title_full_unstemmed | Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion |
| title_short | Fine-Tuning Bi<sub>2</sub>Te<sub>3</sub>-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion |
| title_sort | fine tuning bi sub 2 sub te sub 3 sub copper selenide alloys enables an efficient n type thermoelectric conversion |
| topic | bismuth telluride copper selenide alloy n-type thermoelectric material |
| url | https://www.mdpi.com/1420-3049/27/23/8183 |
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