Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric Performance
Recent studies have revealed the outstanding thermoelectric performance of Bi-doped n-type SnSe. In this regard, we analyzed the band parameters for Sn<sub>1−<i>x</i></sub>Bi<i><sub>x</sub></i>Se (<i>x</i> = 0.00, 0.02, 0.04, and 0.06) usin...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Ceramics |
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| Online Access: | https://www.mdpi.com/2571-6131/6/1/29 |
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| author | Hyunjin Park Sang-il Kim Jeong-Yeon Kim Seong-Mee Hwang Hyun-Sik Kim |
| author_facet | Hyunjin Park Sang-il Kim Jeong-Yeon Kim Seong-Mee Hwang Hyun-Sik Kim |
| author_sort | Hyunjin Park |
| collection | DOAJ |
| description | Recent studies have revealed the outstanding thermoelectric performance of Bi-doped n-type SnSe. In this regard, we analyzed the band parameters for Sn<sub>1−<i>x</i></sub>Bi<i><sub>x</sub></i>Se (<i>x</i> = 0.00, 0.02, 0.04, and 0.06) using simple equations and the Single Parabolic Band model. Bi doping suppresses the carrier-phonon coupling while increasing the density-of-states effective mass. The n-type SnSe is known to have two conduction bands converge near 600 K. Bi doping changes the temperature at which the band convergence occurs. When <i>x</i> = 0.04, its weighted mobility maximized near 500 K, which indicated the possible band convergence. The highest <i>zT</i> of the <i>x</i> = 0.04 sample at mid-temperatures (473–573 K) can be attributed to the engineered band convergence via Bi doping. |
| first_indexed | 2024-03-11T06:46:43Z |
| format | Article |
| id | doaj.art-7bc58ec9a71c435fb342fa13181a835f |
| institution | Directory Open Access Journal |
| issn | 2571-6131 |
| language | English |
| last_indexed | 2024-03-11T06:46:43Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
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| series | Ceramics |
| spelling | doaj.art-7bc58ec9a71c435fb342fa13181a835f2023-11-17T10:14:52ZengMDPI AGCeramics2571-61312023-02-016150451310.3390/ceramics6010029Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric PerformanceHyunjin Park0Sang-il Kim1Jeong-Yeon Kim2Seong-Mee Hwang3Hyun-Sik Kim4Department of Materials Science and Engineering, University of Seoul, 163 Seoulsiripdae-ro, Seoul 02504, Republic of KoreaDepartment of Materials Science and Engineering, University of Seoul, 163 Seoulsiripdae-ro, Seoul 02504, Republic of KoreaDepartment of Materials Science and Engineering, University of Seoul, 163 Seoulsiripdae-ro, Seoul 02504, Republic of KoreaDepartment of Materials Science and Engineering, University of Seoul, 163 Seoulsiripdae-ro, Seoul 02504, Republic of KoreaDepartment of Materials Science and Engineering, University of Seoul, 163 Seoulsiripdae-ro, Seoul 02504, Republic of KoreaRecent studies have revealed the outstanding thermoelectric performance of Bi-doped n-type SnSe. In this regard, we analyzed the band parameters for Sn<sub>1−<i>x</i></sub>Bi<i><sub>x</sub></i>Se (<i>x</i> = 0.00, 0.02, 0.04, and 0.06) using simple equations and the Single Parabolic Band model. Bi doping suppresses the carrier-phonon coupling while increasing the density-of-states effective mass. The n-type SnSe is known to have two conduction bands converge near 600 K. Bi doping changes the temperature at which the band convergence occurs. When <i>x</i> = 0.04, its weighted mobility maximized near 500 K, which indicated the possible band convergence. The highest <i>zT</i> of the <i>x</i> = 0.04 sample at mid-temperatures (473–573 K) can be attributed to the engineered band convergence via Bi doping.https://www.mdpi.com/2571-6131/6/1/29thermoelectricSnSe<i>B</i>-factorweighted mobilitysingle parabolic band model |
| spellingShingle | Hyunjin Park Sang-il Kim Jeong-Yeon Kim Seong-Mee Hwang Hyun-Sik Kim Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric Performance Ceramics thermoelectric SnSe <i>B</i>-factor weighted mobility single parabolic band model |
| title | Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric Performance |
| title_full | Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric Performance |
| title_fullStr | Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric Performance |
| title_full_unstemmed | Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric Performance |
| title_short | Estimation of Temperature-Dependent Band Parameters for Bi-Doped SnSe with High Thermoelectric Performance |
| title_sort | estimation of temperature dependent band parameters for bi doped snse with high thermoelectric performance |
| topic | thermoelectric SnSe <i>B</i>-factor weighted mobility single parabolic band model |
| url | https://www.mdpi.com/2571-6131/6/1/29 |
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