Effects of Sn-deficiency on thermoelectric properties of polycrystalline Sn1-xSe compounds
The effects of Sn-deficiency on the thermoelectric properties of polycrystalline Sn1-xSe (x = 0, 0.01, 0.02, and 0.04) compounds were investigated. The Sn-deficiency caused the formation of the SnSe2 secondary phase in the compounds, and the charge and thermal transport properties were affected sign...
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| Published in | Current applied physics Vol. 17; no. 5; pp. 732 - 737 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
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Elsevier B.V
01.05.2017
한국물리학회 |
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| Online Access | Get full text |
| ISSN | 1567-1739 1878-1675 |
| DOI | 10.1016/j.cap.2017.02.007 |
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| Abstract | The effects of Sn-deficiency on the thermoelectric properties of polycrystalline Sn1-xSe (x = 0, 0.01, 0.02, and 0.04) compounds were investigated. The Sn-deficiency caused the formation of the SnSe2 secondary phase in the compounds, and the charge and thermal transport properties were affected significantly by the secondary phase. Although the Sn-deficient compounds exhibited higher thermal conductivities than stoichiometric compound due to its high thermal conductivity of SnSe2, significantly improved power factors led to the enhancement of ZT. The highest ZT of 0.61 at 848 K was achieved in Sn0.98Se compound, and detailed effects of SnSe2 on the enhancement were discussed.
•The first study on the thermoelectric properties of Sn1-xSe compounds.•Significant role of SnSe2 secondary phase on the thermoelectric transport properties.•Enhancement of ZT by Sn-deficiency without intentional doping of foreign elements. |
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| AbstractList | The effects of Sn-deficiency on the thermoelectric properties of polycrystalline Sn1-xSe (x ¼ 0, 0.01, 0.02, and 0.04) compounds were investigated. The Sn-deficiency caused the formation of the SnSe2 secondary phase in the compounds, and the charge and thermal transport properties were affected significantly by the secondary phase. Although the Sn-deficient compounds exhibited higher thermal conductivities than stoichiometric compound due to its high thermal conductivity of SnSe2, significantly improved power factors led to the enhancement of ZT. The highest ZT of 0.61 at 848 K was achieved in Sn0.98Se compound, and detailed effects of SnSe2 on the enhancement were discussed. KCI Citation Count: 8 The effects of Sn-deficiency on the thermoelectric properties of polycrystalline Sn1-xSe (x = 0, 0.01, 0.02, and 0.04) compounds were investigated. The Sn-deficiency caused the formation of the SnSe2 secondary phase in the compounds, and the charge and thermal transport properties were affected significantly by the secondary phase. Although the Sn-deficient compounds exhibited higher thermal conductivities than stoichiometric compound due to its high thermal conductivity of SnSe2, significantly improved power factors led to the enhancement of ZT. The highest ZT of 0.61 at 848 K was achieved in Sn0.98Se compound, and detailed effects of SnSe2 on the enhancement were discussed. •The first study on the thermoelectric properties of Sn1-xSe compounds.•Significant role of SnSe2 secondary phase on the thermoelectric transport properties.•Enhancement of ZT by Sn-deficiency without intentional doping of foreign elements. |
| Author | Seo, Won-Seon Lee, Soonil Kim, Sung Gyoo Lee, Gil-Geun Lim, Young Soo Lee, Sang Tae Kim, Min Ji |
| Author_xml | – sequence: 1 givenname: Sang Tae surname: Lee fullname: Lee, Sang Tae organization: Department of Materials System Engineering, Pukyong National University, Busan, 48513, South Korea – sequence: 2 givenname: Min Ji surname: Kim fullname: Kim, Min Ji organization: Department of Materials System Engineering, Pukyong National University, Busan, 48513, South Korea – sequence: 3 givenname: Gil-Geun surname: Lee fullname: Lee, Gil-Geun organization: Department of Materials System Engineering, Pukyong National University, Busan, 48513, South Korea – sequence: 4 givenname: Sung Gyoo surname: Kim fullname: Kim, Sung Gyoo organization: Department of Materials System Engineering, Pukyong National University, Busan, 48513, South Korea – sequence: 5 givenname: Soonil surname: Lee fullname: Lee, Soonil organization: Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology, Jinju, 52851, South Korea – sequence: 6 givenname: Won-Seon surname: Seo fullname: Seo, Won-Seon organization: Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology, Jinju, 52851, South Korea – sequence: 7 givenname: Young Soo surname: Lim fullname: Lim, Young Soo email: yslim@pknu.ac.kr organization: Department of Materials System Engineering, Pukyong National University, Busan, 48513, South Korea |
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| Snippet | The effects of Sn-deficiency on the thermoelectric properties of polycrystalline Sn1-xSe (x = 0, 0.01, 0.02, and 0.04) compounds were investigated. The... The effects of Sn-deficiency on the thermoelectric properties of polycrystalline Sn1-xSe (x ¼ 0, 0.01, 0.02, and 0.04) compounds were investigated. The... |
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| SubjectTerms | Polycrystal SnSe SnSe2 Thermoelectric 물리학 |
| Title | Effects of Sn-deficiency on thermoelectric properties of polycrystalline Sn1-xSe compounds |
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