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Polymer-Chain Aggregation-induced Electrical Gating at the H- and J-aggregate P3HT
Byoungnam Park
Korean J. Met. Mater. 2024;62(6):455-463.   Published online 2024 May 31
DOI: https://doi.org/10.3365/KJMM.2024.62.6.455

Abstract
This research explores how aggregation influences the electrical behavior at both the planar - heterojunction poly(3-hexylthiophene) (P3HT)/SiO2 and P3HT/ZnO nanocrystal (NC) interfaces. The formation of H- and J-type aggregates leads to distinct molecular ordering and packing structures, manifesting as changes in threshold voltage shifts (electrical gating) as well as absorption..... More

                
Mg-Composition Dependent Cycle Stability in Zn<sub>1-x</sub>Mg<sub>x</sub>O Li-ion Battery: Transition from Electronic Transport-Limited to Ionic Transport Limited Cycles
Byoungnam Park
Korean J. Met. Mater. 2024;62(5):377-384.   Published online 2024 May 5
DOI: https://doi.org/10.3365/KJMM.2024.62.5.377

Abstract
This study explores Mg-composition dependent cycle stability in a Zn1-xMgxO Li-ion battery, where battery cycles transition from an electronic transport-limited to an ionic transport limited regime. We investigated the impact of Mg doping in Zn1-xMgxO nanocrystals on Li-ion battery performance, focusing on Mg compositions between x=0.05 and x=0.15. Mg composition..... More

                
Characterization of Electronic Transport Properties of Narrow-Band Gap Fe(Se<sub>1-x</sub>Te<sub>x</sub>)<sub>2</sub> Alloys via the Two-Band Model
Two-Band 모델을 이용한 작은 밴드 갭을 가진 Fe(Se1-xTex)2 열전합금의 전기적 수송 특성 분석
Seong-Mee Hwang, Sang-il Kim, Min-Su Heo, Kiyoung Lee, Heesun Yang, Won-Seon Seo, Hyun-Sik Kim
황성미, 김상일, 허민수, 이기영, 양희선, 서원선, 김현식
Korean J. Met. Mater. 2023;61(2):98-106.   Published online 2023 Jan 27
DOI: https://doi.org/10.3365/KJMM.2023.61.2.98

Abstract
Environmentally sustainable thermoelectric technologies can be more broadly applied in industries once the performance of thermoelectric materials is improved. Several approaches have been proposed to improve the electronic transport properties of thermoelectric materials. The effects of each approach on the electronic properties can be evaluated by changes in the band..... More

                
Study of Phase Formation Behavior and Electronic Transport Properties in the FeSe<sub>2</sub> -FeTe<sub>2</sub> System
FeSe2-FeTe2 계 다결정 소재의 상 형성 거동 및 전기 전도 특성에 관한 연구
Okmin Park, TaeWan Kim, Se Woong Lee, Hyun-Sik Kim, Weon Ho Shin, Jamil Ur Rahman, Sang-il Kim
박옥민, 김태완, 이세웅, 김현식, 신원호, , 김상일
Korean J. Met. Mater. 2022;60(4):315-320.   Published online 2022 Mar 28
DOI: https://doi.org/10.3365/KJMM.2022.60.4.315

Abstract
In this study, we investigated the phase formation behavior of the FeSe2-FeTe2 system and the evolution of their thermoelectric transport properties. A series of Fe(Se1-xTex)2(x = 0, 0.2, 0.6, 0.8 and 1) compounds were synthesized by conventional solid-state reaction. Single phase orthorhombic structures were formed, except for FeSe0.4Te1.6(x = 0.2)...... More

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