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A Reasonable DFT Calculation Method for Hybrid Organic-Inorganic Halide Perovskites
MAPbI3 구조를 기반으로 한 하이브리드 유무기 할라이드 페로브스카이트 구조의 합리적인 DFT 계산 방법 연구
Jin-Woong Lee, Woon Bae Park
이진웅, 박운배
Korean J. Met. Mater. 2021;59(4):256-261.   Published online 2021 Mar 24
DOI: https://doi.org/10.3365/KJMM.2021.59.4.256

Abstract
Hybrid Organic-Inorganic Perovskites (HOIP) have received a great deal of attention as a key material for applications like solar cells and light emitting devices because of their many advantages, in spite of their stability and toxicity issues. Attempting to discover and characterize novel HOIPs using just an experimental approach would..... More

      
Impact of Fermi Surface Shape Engineering on Calculated Electronic Transport Properties of Bi-Sb-Te
페르미 면 형상제어에 따른 Bi-Sb-Te 이론 전자수송 특성 변화
Sang-il Kim, Jong-Chan Lim, Heesun Yang, Hyun-Sik Kim
김상일, 임종찬, 양희선, 김현식
Korean J. Met. Mater. 2021;59(1):54-60.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.54

Abstract
Using thermoelectric refrigerators can address climate change because they do not utilize harmful greenhouse gases as refrigerants. To compete with current vapor compression cycle refrigerators, the thermoelectric performance of materials needs to be improved. However, improving thermoelectric performance is challenging because of the trade-off relationship between the Seebeck coefficient and..... 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

Abstract
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

                        
Enhanced Thermoelectric Transport Properties of <i>n</i>-type InSe by Sn doping
Sung-sil Choo, Seok-won Hong, Hyun-Sik Kim, Sang-il Kim
Korean J. Met. Mater. 2020;58(5):348-352.   Published online 2020 Apr 20
DOI: https://doi.org/10.3365/KJMM.2020.58.5.348

Abstract
Layered post transition metal chalcogenides such as SnSe, SnSe2, In2Se3, and In4Se3 have attracted attention as promising thermoelectric materials due to their intrinsically low lattice thermal conductivities. Recently, n-type indium selenide (InSe) based materials have also been suggested as good candidates for thermoelectric materials by optimizing their electrical properties, i.e.,..... More

                        
Effect of Cu/In Doping on the Thermoelectric Transport Properties of Bi-Sb-Te Alloys
Bi-Sb-Te계 합금의 열전물성에 대한 Cu 및 In 첨가 영향
Hyun Jun Cho, Hyun-Sik Kim, Sang-Il Kim
조현준, 김현식, 김상일
Korean J. Met. Mater. 2019;57(10):673-678.   Published online 2019 Sep 23
DOI: https://doi.org/10.3365/KJMM.2019.57.10.673

Abstract
Herein we report the effect of Cu/In doping on the electronic and thermal transport properties of Bi-Sb-Te thermoelectric alloys. To closely examine the role of each doping element when incorporated in a Bi0.4Sb1.6Te3 alloy, different groups of samples were prepared and characterized, including undoped Bi0.4Sb1.6Te3, In single-doped samples and In..... More

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