Bark, Hyunwoo Kim, Jin-Sang Kim, Heesuk Yim, Ju-Hyuk Lee, Hyunjung 2024-01-20T12:02:42Z 2024-01-20T12:02:42Z 2021-09-05 2013-07 1567-1739 https://pubs.kist.re.kr/handle/201004/127907 Carbon nanotubes (CNTs) have been not attractive for thermal energy conversion applications because of their high thermal conductivities and low Seebeck coefficient. In other words, traditional thermoelectric materials are basically low bandgap semiconductors such as bismuth telluride and antimony telluride, which have shown outstanding performance. In this report, we studied the effect of a network consisting of CNTs as an impurity in a matrix of bismuth telluride (Bi2Te3) particles. We dispersed Bi2Te3 particles and CNTs together in a solvent and fabricated composite samples under vacuum filtration. Seven different CNTs concentration, 0, 10, 20, 50, 70, 90, 100 vol% were used to compare the influence of CNTs on electrical conductivity and thermopower of the composites. At the low contents (10 and 20 vol%) of CNTs, the electrical conductivity and the thermopower were a little increased, which can be attributed to p-typed doping effect of CNTs on Bi2Te3 particles. At the high contents (50, 70 and 90 vol%) of CNTs, the electrical conductivity and the thermopower were decreased, which can be attributed to hindered carrier mobility. (C) 2013 Elsevier B.V. All rights reserved. English ELSEVIER PERFORMANCE Effect of multiwalled carbon nanotubes on the thermoelectric properties of a bismuth telluride matrix Article 10.1016/j.cap.2013.01.019 1 CURRENT APPLIED PHYSICS, v.13, pp.S111 - S114 CURRENT APPLIED PHYSICS 13 S111 S114 scie scopus kci 000323140300021 2-s2.0-84887036653 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article; Proceedings Paper PERFORMANCE Thermoelectrics Bismuth telluride Carbon nanotube Seebeck coefficient