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Improvement in thermoelectric performance of In6Se7 by substitution of Sn for In.
- Source :
-
Physica Status Solidi. A: Applications & Materials Science . Aug2016, Vol. 213 Issue 8, p2176-2182. 7p. - Publication Year :
- 2016
-
Abstract
- In this work we have observed a remarkable improvement in the thermoelectric (TE) performance of In6- xSn xSe7 ( ZT = ∼0.28 at x = 0.1, 833 K) compared to that of pristine In6Se7 ( ZT = 0.015 at 640 K). This improvement is mainly attributed to the creation of active donor defects SnIn3+ as Sn(4+) is energetically favorable to In+ sites. Although Sn (2+), which generates a defect SnIn− as an acceptor when it is incorporated into the In3+ sites, has a negative effect on the transport properties, the counter effect from Sn(4+) and Sn(2+) suggests that In6Se7-based alloys are prospectively good thermoelectric candidates if their chemical compositions are well optimized. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18626300
- Volume :
- 213
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Physica Status Solidi. A: Applications & Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 117343541
- Full Text :
- https://doi.org/10.1002/pssa.201600003