Journal
ADVANCED MATERIALS
Volume 28, Issue 30, Pages 6436-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201601256
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Funding
- National Science Foundation [ECCS 1002280, CMMI 1100933]
- Alexander von Humboldt foundation
- Department of Energy, Office of Science, Basic Energy Sciences through S3TEC an Energy Frontier Research Center [DE-SC0001299/DE-FG02-09ER46577]
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Dilute isovalent sulfur doping simultaneously increases electrical conductivity and Seebeck coefficient in Bi2Te2Se nanoplates, and bulk pellets made from them. This unusual trend at high electron concentrations is underpinned by multifold increases in electron effective mass attributable to sulfur-induced band topology effects, providing a new way for accessing a high thermoelectric figure-of-merit in topological-insulator-based nanomaterials through doping.
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