Dense dislocation arrays embedded in grain boundaries for high-performance bulk thermoelectrics
Top Cited Papers
- 3 April 2015
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 348 (6230), 109-114
- https://doi.org/10.1126/science.aaa4166
Abstract
Squeezing out efficient thermoelectrics: Thermoelectric materials hold the promise of converting waste heat into electricity. The challenge is to develop high-efficiency materials that are not too expensive. Kim et al. suggest a pathway for developing inexpensive thermoelectrics. They show a dramatic improvement of efficiency in bismuth telluride samples by quickly squeezing out excess liquid during compaction. This method introduces grain boundary dislocations in a way that avoids degrading electrical conductivity, which makes a better thermoelectric material. With the potential for scale-up and application to cheaper materials, this discovery presents an attractive path forward for thermoelectrics. Science , this issue p. 109Keywords
Funding Information
- National Research Foundation of Korea (2013R1A1A1008025)
- Human Resources Development (2.01E+13)
- Korea government Ministry of Trade, Industry, and Energy
- AFOSR MURI (FA9550-10-1-0533)
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