Journal
SCRIPTA MATERIALIA
Volume 145, Issue -, Pages 41-44Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.10.009
Keywords
Thermoelectric materials; Spark plasma sintering; Thermal conductivity; Electrical properties; Point defects
Categories
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2014R1A2A1A10053869]
- Priority Research Centers Program [2009-0093823]
- National Research Foundation of Korea [2009-0093823, 2014R1A2A1A10053869, 2017R1A2A1A17069528] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Herein, we report the results of a systematic study on the effect of Pb doping on the thermoelectric transport properties of p-type BiSbTe alloys to validate its potential applications for low-temperature power generation. The maximum power factor (similar to 4.4 mW m(-1) K-2) at 300 K was obtained using 0.31 at.% Pb-doped Bi0.52Sb1.Te-48(3) and was found to originate from an enlarged density of states effective mass as a result of the band engineering effect. The maximum efficiency of thermoelectric power generation (eta(max)) could be enhanced by 150% at Delta T = 220 K when the Pb concentration was optimized. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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