Yim, Ju-Hyuk Jung, Kyooho Yoo, Myong-Jae Park, Hyung-Ho Kim, Jin-Sang Park, Chan 2024-01-20T16:35:23Z 2024-01-20T16:35:23Z 2021-09-04 2011-07 1567-1739 https://pubs.kist.re.kr/handle/201004/130235 Quaternary In-Se-Bi-Te compounds (7.5Bi(2)Te(3)-In(2)Se(3) and 7.5Bi(2)Te(3)-In(4)Se(3)) were prepared by water quenching and annealing, and the microstructures and thermoelectric properties were investigated. These materials were solidified to near-eutectic compositions in order to obtain micro-scale hetero-interfaces. The formation of sub-micrometer-scale lamellae layers of Bi(2)Te(3) and In-Se-Te compounds was observed. Through quenching, the 7.5Bi(2)Te(3)-In(2)Se(3) consisted of a Bi(2)Te(3) and In-Se-Te compound, while the 7.5Bi(2)Te(3)-In(4)Se(3) was composed of Bi(2)Te(3), BiTe, and In(4)Se(3) and In-Se-Te. Both the microstructure and the constituent phases changed after annealing. The reduction of thermal conductivities, as compared to that of bulk Bi(2)Te(3), was confirmed. This result can be attributed to the increased number of phase boundary areas. The size of the decomposed phase could be controlled by changing the parameters of the annealing process, which could further decrease the thermal conductivity. (C) 2011 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV DEVICES Preparation and thermoelectric properties of quaternary bismuth telluride-indium selenide compound Article 10.1016/j.cap.2011.02.026 1 CURRENT APPLIED PHYSICS, v.11, no.4, pp.S46 - S49 CURRENT APPLIED PHYSICS 11 4 S46 S49 scie scopus kci 000296726300013 2-s2.0-80455173962 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article; Proceedings Paper DEVICES Bi(2)Te(3)-Indium selenide Thermoelectric Phase separation Thermal conductivity