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Influence of Te Vacancies on the Thermoelectric Properties of <i>n</i>-type Cu<sub>0.008</sub>Bi<sub>2</sub>Te<sub>2.7-x</sub>Se<sub>0.3</sub>
n-type Cu0.008Bi2Te2.7-xSe0.3 열전 합금에서 Te 공공 형성에 의한 열전 성능 연구
Yerim Yang, TaeWan Kim, Seokown Hong, Jiwoo An, Sang-il Kim
양예림, 김태완, 홍석원, 안지우, 김상일
Korean J. Met. Mater. 2020;58(10):721-727.   Published online 2020 Oct 5
DOI: https://doi.org/10.3365/KJMM.2020.58.10.721

In this study, we report the influence of Te vacancy formation on the thermoelectric properties of n-type Cu0.008Bi2Te2.7Se0.3 alloys, including their electronic and thermal transport properties. Te-deficient Cu0.008Bi2Te2.7-xSe0.3 (x = 0, 0.005, 0.01 and 0.02) samples were systematically synthesized and characterized. Regarding electronic transport properties, carrier concentration was increased with..... More

Influence of Cu Doping on Bipolar Conduction Suppression for <i>p</i>-type Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3</sub> and Bi<sub>0.4</sub>Sb<sub>1.6</sub>Te<sub>3</sub> Alloys
Cu 첨가에 따른 p-type Bi0.5Sb1.5Te3 및 Bi0.4Sb1.6Te3 합금의 양극성 전도 저감 효과
Hyun-Jun Cho, Hyun-Sik Kim, Woong-hee Sohn, Sang-il Kim
조현준, 김현식, 손웅희, 김상일
Korean J. Met. Mater. 2020;58(6):439-445.   Published online 2020 May 21
DOI: https://doi.org/10.3365/KJMM.2020.58.6.439

In this study, we report how Cu doping can modify the thermoelectric performance of p-type Bi0.5Sb1.5Te3 and Bi0.4Sb1.6Te3 thermoelectric alloys, including their electronic and thermal transport properties. For electronic transport, the power factors of both Bi0.5Sb1.5Te3 and Bi0.4Sb1.6Te3 compositions were increased by Cu doping. The origins of the enhanced power..... More

Thermoelectric Transport Properties of N-type Bi<sub>2</sub>Te<sub>2.7</sub>Se<sub>0.3</sub> Compound Prepared by Oxide-Reduction Process
산화물 환원공정에 의해 제작된 n-형 Bi2Te2.7Se0.3 화합물의 열전특성연구
Young Soo Lim, Bae Gun Park, Gil-Geun Lee
임영수, 박배건, 이길근
Korean J. Met. Mater. 2020;58(5):334-339.   Published online 2020 Apr 20
DOI: https://doi.org/10.3365/KJMM.2020.58.5.334

We report the thermoelectric transport properties of n-type Bi2Te2.7Se0.3 compounds prepared by oxide-reduction process. The oxide-reduction process is a recently developed method that can synthesize Bi2Te3-based compounds using only oxide starting materials, which is advantageous in terms of the diversity of the starting materials and cost efficiency. In this study,..... More

Thermoelectric Transport Properties of Interface-Controlled <i>n</i>-type Bismuth Telluride Selenide Composites by Reduced Graphene Oxide
환원 그래핀 산화물을 이용하여 계면제어된 n형 Bismuth Telluride Selenide 복합체의 열전수송특성에 대한 연구
Ui Gyeong Hwang, Young Soo Lim
황의경, 임영수
Korean J. Met. Mater. 2019;57(9):603-608.   Published online 2019 Aug 21
DOI: https://doi.org/10.3365/KJMM.2019.57.9.603

We report the effect of interface control using reduced graphene oxide (RGO) on the thermoelectric transport properties of Bi2Te2.7Se0.3 (BTS)-RGO composites. The interface-controlled BTS-RGO composites were prepared by the consolidation of BTS-RGO hybrid powders using spark plasma sintering (SPS). The RGO-hybridization reduced the grain size in the BTS-RGO composites because..... More

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