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http://dx.doi.org/10.6117/kmeps.2021.28.4.091

Enhanced Thermoelectric Properties in n-Type Bi2Te3 using Control of Grain Size  

Lee, Nayoung (Department of Advanced Science and Technology Convergence, Kyungpook National University)
Ye, Sungwook (School of Nano & Materials Science and Engineering, Kyungpook National University)
Jamil Ur, Rahman (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Tak, Jang-Yeul (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Cho, Jung Young (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Seo, Won Seon (Department of Materials Science & Engineering, Yonsei University)
Shin, Weon Ho (Electronic Materials Engineering, Kwangwoon University)
Nam, Woo Hyun (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Roh, Jong Wook (Department of Advanced Science and Technology Convergence, Kyungpook National University)
Publication Information
Journal of the Microelectronics and Packaging Society / v.28, no.4, 2021 , pp. 91-96 More about this Journal
Abstract
The enhancement of thermoelectric figure of merit was achieved by the simple processes of sieving and high energy ball milling, respectively, which are enable to reduce the grain size of n-type Bi2Te3 thermoelectric materials. By optimizing the grain size, the electrical conductivities and thermal conductivities were controlled. In this study, spark plasma sintering was employed for hindering the grain growth during the sintering process. The thermoelectric figure of merit was measured to be 0.78 in the samples with 30 min high energy ball milling process. Notably, this value was 40 % higher than that of pristine Bi2Te3 sample. This result shows the properties of thermoelectric materials can be readily controlled by optimization of grain size via simple ball milling process.
Keywords
Thermoelectrics; Seebeck effect; Milling; $Bi_2Te_3$; Grain size;
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  • Reference
1 G. Tan, L. D. Zhao, and M. G. Kanatzidis, "Rationally Designing High-Performance Bulk Thermoelectric Materials," Chem. Rev., vol. 116, no. 19, pp. 12123-12149, (2016).   DOI
2 B. Poudel et al., "High-thermoelectric performance of nanostructured bismuth antimony telluride bulk alloys." Science 320(5876) 634 (2008).   DOI
3 G. S. Nolas, D. T. Morelli, and T. M. Tritt, "Skutterudites: a phonon-glass-electron crystal approach to advanced thermoelectric energy conversion applications," Annu. Rev. Mater. Sci., vol. 29, pp. 89-116, (1999).   DOI
4 S. Cho et al., "Antisite defects of Bi 2 Te 3 thin films." Applied physics letters 75(10), 1401 (1999).   DOI
5 S. S. Lin and C. N. Liao, "Effect of ball milling and post treatment on crystal defects and transport properties of Bi2(Se,Te)3 compounds," J. Appl. Phys., vol. 110, no. 9, (2011).
6 G. J. Snyder, E. S. Toberer, "Complex thermoelectric materials", Nature Materials, 7, 105 (2008).   DOI
7 J. H. Son et al., "Effect of ball milling time on the thermoelectric properties of p-type (Bi,Sb)2Te3," J. Alloys Compd., 566, 168 (2013).   DOI
8 Y. G. Gurevich et al., "Nature of the thermopower in bipolar semiconductors." Physical Review B 51.11 : 6999. (1995).   DOI
9 S. Yoon et al., "The effect of grain size and density on the thermoelectric properties of Bi2Te3-PbTe compounds," J. Electron. Mater., vol. 42, no. 12, pp. 3390-3396, (2013).   DOI
10 J. J. Gong et al., "Investigation of the bipolar effect in the thermoelectric material CaMg 2 Bi 2 using a first-principles study." Physical Chemistry Chemical Physics 18(24), 16566 (2016).   DOI
11 C. H. Kuo, C. S. Hwang, M. S. Jeng, W. S. Su, Y. W. Chou, and J. R. Ku, "Thermoelectric transport properties of bismuth telluride bulk materials fabricated by ball milling and spark plasma sintering," J. Alloys Compd., vol. 496, no. 1-2, pp. 687-690, (2010).   DOI
12 L. P. Hu, T. J. Zhu, Y. G. Wang, H. H. Xie, Z. J. Xu, and X. B. Zhao, "Shifting up the optimum figure of merit of p-type bismuth telluride-based thermoelectric materials for power generation by suppressing intrinsic conduction," NPG Asia Mater., vol. 6, no. 2, pp. e88-8, (2014).   DOI
13 T. M. Tritt and M. A. Subramanian, "Thermoelectric Materials, Phenomena, and Applications: A Bird's Eye View," MRS Bulletin, vol. 31, no. March, (2006).
14 D. M. Rowe, C. M. Bhandari, Modern Thermoelectric, Reston Publishing Company, Inc., Reston, (1983).