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한국전기전자재료학회> 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)

전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) update

Journal of the Korean Institute of Electrical and Electronic Material Engineers

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  • : 전기전자재료학회지(~1997)→전기전자재료학회논문지

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수록범위 : 1권1호(1988)~32권3호(2019) |수록논문 수 : 4,372
전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.)
32권3호(2019년 05월) 수록논문
최근 권호 논문
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1도전재 종류에 따른 리튬이차전지 음극재 SiOx의 전기화학적 특성

저자 : 연지수 ( Ji-su Yun ) , 장보윤 ( Boyun Jang ) , 김성수 ( Sung-soo Kim ) , 김향연 ( Hyang-yeon Kim )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 179-186 (8 pages)

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This work investigated the effects of different conductive agents on the electrochemical properties of anodes. SiOx possesses high theoretical capacity and shows excellent cycle performance; however, the low initial coulombic efficiency and poor electrical conductivity limit its applications in real batteries. In this study, electrodes were fabricated using two different conductive agents, and the resulting physical and electrochemical properties were analyzed. SEM observations confirmed the formation of a CNT conductive network throughout the electrodes, while the electrical conductivity contributed to the electrode was confirmed by impedance measurements. Thus, the electrode fabricated with the CNT conductive agent showed greater capacity and superior cycle performance than did the electrode fabricated using the DB conductive agent.

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2레이저 스크라이빙에 의한 결정질 실리콘 태양전지의 분할 및 특성 분석

저자 : 박지수 ( Ji Su Park ) , 오원제 ( Won Je Oh ) , 이수호 ( Soo Ho Lee ) , 이재형 ( Jae Hyeong Lee )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 187-191 (5 pages)

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Advances in laser technology have enabled ultra-high-speed ultra-precise processing, thus expanding potential applications to the semiconductor, medical, and photovoltaic industries. In particular, laser scribing technology has been applied to the production of shingled solar modules. In this work, we analyze the effect of laser scribing conditions, e.g., scribing depth, on the characteristics of the resulting divided solar cells. When the scribing depth was greater than 100 ㎛, the solar cells were well separated. In addition, the desired scribing depths were reached in fewer scans when the laser spot overlap was 100%. The efficiency of the divided cells decreased due to the high series resistance at scribing depths of less than 100 ㎛. However, at scribing depths of approximately 100 ㎛, the series resistance was low and efficiency reduction was minimized.

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3가속기 백색광 X-Ray Topography를 이용한 CVD 단결정 다이아몬드 내부 전위 분석

저자 : 유영재 ( Yeong-jae Yu ) , 정성민 ( Seong-min Jeong ) , 배시영 ( Si-young Bae )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 192-195 (4 pages)

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Single-crystal diamond obtained by chemical vapor deposition (CVD) exhibits great potential for use in next-generation power devices. Low defect density is required for the use of such power devices in high-power operations; however, plastic deformation and lattice strain increase the dislocation density during diamond growth by CVD. Therefore, characterization of the dislocations in CVD diamond is essential to ensure the growth of high-quality diamond. In this work, we analyze the characteristics of the dislocations in CVD diamond through synchrotron white beam X-ray topography. In estimate, many threading edge dislocations and five mixed dislocations were identified over the whole surface.

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4ZnO 기판의 불순물 속박 엑시톤 발광을 이용한 물성 분석

저자 : 최준석 ( Jun Seck Choi ) , 고동완 ( Dong Wan Ko ) , 정민지 ( Min Ji Jeong ) , 이상태 ( Sang Tae Lee ) , 장지호 ( Ji Ho Chang )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 196-200 (5 pages)

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In this study, photoluminescence (PL) analysis was performed to evaluate the optical properties of commercial ZnO substrates. Particular attention was paid to the bound exciton (BX) luminescence, which is usually the strongest emission intensity of commercial substrates. At 15 K, PL analysis revealed that the BX peak due to donor-type impurities (donor-bound-exciton; DX) dominated, while two-electron satellite (TES) emission, donor-accepter pair (DAP) emission, and LO-phonon replica emission were also observed. The impurity concentration of the ZnO substrate was determined to be 1015 to 1016/cm3 by examination of the temperature variation of DAP, while the half width and intensity change of the luminescence revealed that the temperature change of BX can be interpreted almost the same as the analysis of free-exciton emission.

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5고전압 β-산화갈륨(β-Ga2O3) 전력 MOSFETs

저자 : 문재경 ( Jae-kyoung Mun ) , 조규준 ( Kyujun Cho ) , 장우진 ( Woojin Chang ) , 이형석 ( Hyungseok Lee ) , 배성범 ( Sungbum Bae ) , 김정진 ( Jeongjin Kim ) , 성호근 ( Hokun Sung )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 201-206 (6 pages)

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This report constitutes the first demonstration in Korea of single-crystal lateral gallium oxide (Ga2O3) as a metal-oxide-semiconductor field-effect-transistor (MOSFET), with a breakdown voltage in excess of 480 V. A Si-doped channel layer was grown on a Fe-doped semi-insulating β-Ga2O3 (010) substrate by molecular beam epitaxy. The single-crystal substrate was grown by the edge-defined film-fed growth method and wafered to a size of 10×15 mm2. Although we fabricated several types of power devices using the same process, we only report the characterization of a finger-type MOSFET with a gate length (Lg) of 2 μm and a gate-drain spacing (Lgd) of 5 μm. The MOSFET showed a favorable drain current modulation according to the gate voltage swing. A complete drain current pinch-off feature was also obtained for Vgs<-6 V, and the three-terminal off-state breakdown voltage was over 482 V in a Lgd=5 μm device measured in Fluorinert ambient at Vgs=-10 V. A low drain leakage current of 4.7 nA at the off-state led to a high on/off drain current ratio of approximately 5.3×105. These device characteristics indicate the promising potential of Ga2O3-based electrical devices for next-generation high-power device applications, such as electrical autonomous vehicles, railroads, photovoltaics, renewable energy, and industry.

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6평판형 적층 세라믹 초음파 압전 트랜스미터의 제조와 성능 평가

저자 : 나용현 ( Yong-hyeon Na ) , 이민선 ( Min-seon Lee ) , 조정호 ( Jeong-ho Cho ) , 백종후 ( Jong-hoo Paik ) , 이정우 ( Jung Woo Lee ) , 정영훈 ( Young-hun Jeong )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 207-212 (6 pages)

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A flat-type piezoelectric ceramic ultrasonic transmitter was successfully fabricated for application in acoustic devices with cone-free diaphragms. The transmitter, possessing a center frequency of 40.6 kHz, exhibited a higher displacement characteristic for a multilayer type compared with a single layer type. Surface roughness treatment of an Al elastic diaphragm influenced a slight increase (1.1 dB) in the sound pressure level (SPL) at 10 Vrms due to the enlarged surface area. The fabricated multilayer piezoelectric ceramic ultrasonic transmitter showed increasing SPL with increasing input voltage, with a maximum SPL of approximately 123.6 dB at 10 Vrms. This implies a doubly increased SPL density of 3.6 dB/mm3, superior to that of a commercial open-type transmitter with a cone.

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7팽창질석 첨가에 따른 전선용 실리콘 고무의 난연 및 트래킹 특성에 관한 연구

저자 : 박승호 ( Seung Ho Park ) , 이성일 ( Sung Ill Lee )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 213-218 (6 pages)

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In this study, a high-temperature vulcanizing (HTV) method was used to achieve a shore a hardness of 70. The basic base was composed of 60% silicon gum (GUM) which is a high-viscosity polymer, 30% fumed silica (FS), and 5% of plasticizer. The GUM and FS were mixed well with less than 1% silane to improve rubber strength. Expanded vermiculite was added as a filler at 10%, 15%, and 20%. The curing conditions were 170℃ for 10 min and a molding method was applied. We report herein, the results of inorganic analysis and flame-retardant and tracking tests on the expanded vermiculite. The flame retardance and tracking test outcomes for a shore a hardness of 70 were found to be optimal when the expanded vermiculite content was 10%.

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8낮은 TCR 특성을 가지는 플레이트 션트저항의 전기적 특성

저자 : 임영택 ( Youngtaek Lim ) , 김은민 ( Eun-min Kim ) , 이상원 ( Sang-won Lee ) , 안정래 ( Jeong-rae Ahn ) , 이선우 ( Sunwoo Lee )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 219-222 (4 pages)

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In this study, we fabricated plate-type shunt resistors with thermal stability by parallelly connecting metal alloy plates with positive temperature coefficient of resistance (TCR) and carbon nanotube (CNT) plates with negative TCR. The metal alloy plates, which were prepared by alloying Cu and Mn with a composition of 91 wt% of Cu and 9 wt% of Mn, showed around 800 ppm/℃ of TCR, and the CNT plates prepared from the CNT solution by using the vacuum filtration method showed around -800 ppm/℃ of TCR. The shunt resistor that was fabricated by stacking metal alloy plates and CNT plates in this work showed about 46.93 ppm/℃ of TCR. Therefore, we conclude that a shunt resistor with low TCR can be realized by simply adjusting the TCR of the metal alloy only, because the TCR of the CNT plate has an identical value.

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9Ag:CNT 인쇄박막 액체 센서의 위험유해물질 검출 특성

저자 : 고동완 ( Dongwan Ko ) , 최준석 ( Junseck Choi ) , 이상태 ( Sangtae Lee ) , 장지호 ( Jiho Chang )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 223-228 (6 pages)

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We fabricated a printed Ag:CNT film as a liquid sensor for the detection of HNS (hazardous and noxious substances) in seawater. The paste required for printing was prepared using Ag powder, MWCNTs (multi-walled carbon nanotubes), and an organic binder. The heat treatment process for binder removal was optimized. In order to confirm that the sensor was operational, the resistance change characteristics in brine (3.5%) and methanol (99.8%) were assessed at 20℃. EDL (electrical double layer) formation and redox reactivity were confirmed as the most important reactions affect each electrical property of sensor in brine and methanol. From these results, it was determined that printed Ag:CNT film can be applied as a sensor to detect HNS in seawater.

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10Eu와 V 동시 도핑에 의한 BiFeO3 박막의 구조와 전기적 특성

저자 : 장성근 ( Sung-keun Chang ) , 김윤장 ( Youn-jang Kim )

발행기관 : 한국전기전자재료학회 간행물 : 전기전자재료학회논문지(J. Korean Inst. Electr. Electron. Mater. Eng.) 32권 3호 발행 연도 : 2019 페이지 : pp. 229-233 (5 pages)

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Pure BiFeO3 (BFO) and (Eu, V) co-doped Bi0.9Eu0.1Fe0.975V0.025O3+δ (BEFVO) thin films were deposited on Pt(111)/Ti/SiO2/Si(100) substrates by chemical solution deposition. The effects of co-doping were observed by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy (SEM). The electrical properties of the BEFVO thin film were improved as compared to those of the pure BFO thin film. The remnant polarization (2Pr) of the BEFVO thin film was approximately 26 μC/cm2 at a maximum electric field of 1,190 kV/cm with a frequency of 1 kHz. The leakage current density of the co-doped BEFVO thin film (4.81×10-5 A/cm2 at 100 kV/cm) was two orders of magnitude lower than of that of the pure BFO thin film.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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