Effects of crystal-alignment and grain shape on the thermoelectric properties of Bi0.5Sb1.5Te3 alloys
- Title
- Effects of crystal-alignment and grain shape on the thermoelectric properties of Bi0.5Sb1.5Te3 alloys
- Author(s)
- Je, Koo-Chul ; Ko, Beyungduk ; Kim, Cham ; Kim, Hoyoung ; Kim, Dong Hwan
- DGIST Authors
- Je, Koo-Chul ; Ko, Beyungduk ; Kim, Cham ; Kim, Hoyoung ; Kim, Dong Hwan
- Issued Date
- 2012-03
- Type
- Article
- Article Type
- Article
- Author Keywords
- Alignment ; Grain shape ; Quantum confinement ; Thermoelectric properties
- Keywords
- LATTICE THERMAL CONDUCTIVITY ; TRANSPORT-PROPERTIES ; SEMICONDUCTORS ; FABRICATION ; ANISOTROPY ; MOBILITY ; MODEL
- ISSN
- 0925-8388
- Abstract
- We investigated the thermoelectric properties of sintered Bi 0.5Sb 1.5Te 3 alloys containing grains for their alignment, sizes and shapes. The figure of merit can be improved as the result of lower resistivity by increasing the alignment, which is realized by using the spark plasma sintering method and a strong magnetic field. In addition, making the grains more spherical can improve the thermoelectric efficiency as a result of carrier quantum confinement and enhancement of the band gap energy. © 2011 Elsevier B.V. All rights reserved.
- Publisher
- Elsevier
- Related Researcher
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Kim, Cham
- Research Interests
-
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- Appears in Collections:
- Division of Nanotechnology 1. Journal Articles
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