期刊
NANO LETTERS
卷 9, 期 4, 页码 1419-1422出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl803235n
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资金
- DOE [DEFG02-00ER45805, DE-FG02-02ER45977, DE-FG0208ER46516]
- NSF NIRT [0506830]
- NSF CMMI [0833084]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0833084] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0506830] Funding Source: National Science Foundation
The microstructures of bulk nanograined p-type bismuth antimony telluride with a thermoelectric dimensionless figure-of-merit ZT = 1.4 are investigated using transmission electron microscopy. It is found that the bulk material contains both nano- and microsized grains. Between the nanograins, bismuth-rich interface regions with a 4 nm thickness were detected. In addition, nanoprecipitates as well as other defects are also found to be embedded in the nanograins. The high ZT is attributed to the slight increase in the electrical conductivity, and to the large decrease of the thermal conductivity.
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