• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2008년도 춘계학술대회 및 기술 세미나 논문집 디스플레이 광소자
• /
• pp.67-68
• /
• 2008

A simple bi-layer structure of organic light emitting diode (OLED) was used to study the characteristics of anode preparation. Indium tin oxide (ITO) anode surface treatment of OLEDs was performed to get the optimum condition for the ITO anode. The ITO surface was treated by $O_2$ or $O_2$ / Ar mixed gas plasma with different processing time. The electrical characteristics of OLED were improved by plasma treatment. The operating voltage of OLED with $O_2$ or $O_2$/Ar mixed gas plasma treated anodes decreases from 8.2 to 3.4 V and 3.2V, respectively. The $O_2$ /Ar mixed gas plasma treatment results in better electrical property.

• Journal of Mechanical Science and Technology
• /
• 제18권4호
• /
• pp.592-596
• /
• 2004

Corrosion is never avoided in the use of materials with various environments. The underwater hull is normally protected against rusting by several coatings of anti-corrosive paint. The purpose of ICCP(Impressed Current Cathodic protection) system is to eliminate the rusting or corrosion, which occurs on metal immersed in seawater. The anode of ICCP system is controlled by an external DC source with converter. The function of anode is to conduct the protective current into seawater. The proposed algorithm includes the harmonic suppression control strategy and the optimum protection strategy and has tried to test the requirement current density for protection, the influence of voltage, the protection potential. This paper was studied the variation of potential and current density with environment factors, time and velocity, and the experimental results will be explained.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
• /
• pp.885-886
• /
• 2003

A bilayer is used as an anode electrode for organic electroluminescent devices. The bilayer consist of an ultrathjn ZnO layer adjacent to an hole-transporting layer and an Indium tin oxide(ITO) outerlayer. We tried to bring low the barrier between the devices as deposited ZnO films on ITO substrates. We fabricated the organic EL structure consisted of Al as cathode, $Al_{2}O_{3}$ as electro transport layer, Alq3 as luminously layer, triphenyl diamine(TPD) as hole transport layer and ZnO(l nm )/ITO(l50 nm) as anode. The result of this experiment was not good compared with the case of using ITO, Nevertheless, at this structure we obtained the lowest turn-on voltage as the value of 19 V and the good brightness (6200 $cd/m^{2}$) of the emission light from the devices. Then the quantum efficiency was to be 1.0%.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1996년도 하계학술대회 논문집 C
• /
• pp.1412-1413
• /
• 1996

Li ion battery have many advantages such as high energy density, high voltage and low self discharge, so it will replace conventional Ni/Cd battery. But, charge-discharge characterization of Li battery is controlled by weight ratio of electrodes (Cathode/Anode). So, we performed a study on relation between charge/discharge characterization and weight ratio (cathode/anode).

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 1997년도 추계학술대회 논문집
• /
• pp.369-372
• /
• 1997

Wire Ion Plasma Source (WIPS) is a plasma device which has a thin wire anode, a coaxially-set cylindrical cathode and electrodes located in both ends of the cylinder. The potential between the anode and cathode changes logarithmically by this electrode configuration. This electrode configuration enables high-density plasma to produce even at a low anode voltage. Since the electrode configuration is axially symmetric and long. plasma with axially uniform number density can be produced. Using particle-in-cell(PIC) and Monte Carlo collision(MCC), we investigate the traiectory of electrons and the characteristics of D.C. discharge in Wire ton Plasma Source.

• 공업화학
• /
• 제29권6호
• /
• pp.696-702
• /
• 2018

최근 열전지는 우주 및 국방분야에서 활용하기 위하여 고출력 및 고에너지 밀도의 새로운 전극재료가 요구되는 실정이다. 본 논문에서는 성형성과 용량의 한계를 가지는 펠릿 타입의 리튬-실리콘 합금(Li(Si)) 음극을 대체하기 위하여 고밀도를 가지는 리튬음극을 제조하고, 단위전지 및 열전지의 전기화학적 성능에 미치는 영향을 고찰하였다. 리튬음극은 $500^{\circ}C$에서 안정적인 작동을 위하여 철 분말을 바인더로 사용하였고 리튬 중량별(17, 15, 13 wt%) 단위전지 성능평가를 통해 리튬 13 wt%에서 안정적인 성능을 확인하였다. 또한 리튬음극을 사용한 단위전지의 개회로전압이 2.06 V로 Li(Si) 음극 개회로전압 1.93 V에 비해 약 0.1 V 이상 높게 나타났고, first phase에서 리튬음극의 비용량은 $1,632As{\cdot}g^{-1}$로 Li(Si) 음극의 비용량 $1,181As{\cdot}g^{-1}$에 비해 약 1.4배 정도 성능이 향상됨을 확인하였다. 리튬음극을 적용한 열전지를 상온 및 고온 성능시험 결과를 통하여 Li(Si) 음극 열전지에 비해 전압 및 작동시간 등이 탁월하며, 출력특성 및 에너지밀도가 획기적으로 향상됨을 확인하였다.

• 한국세라믹학회지
• /
• 제44권10호
• /
• pp.542-547
• /
• 2007

We have determined an optimal reduction condition for NiO-based anode in single chamber solid oxide fuel cells that involve samaria-doped ceria (SDC) as an electrolyte. Optimal condition should not only induce sufficient reduction of NiO to Ni, but also prevent the reduction of SDC electrolyte in order to achieve high open circuit voltage (OCV) and power output. Thermodynamic consideration allowed us to determine the optimal anode reduction condition as $96%H_2-4%H_2O$ atmosphere at $250^{\circ}C$. This finding was in a good agreement with the experimental verifications by monitoring the conductivities of SDC and NiO under different reducing conditions.

• 수산해양기술연구
• /
• 제19권1호
• /
• pp.57-62
• /
• 1983

접지전지 설계를 위한 Zn, Al 및 Mg의 합급양극의 특성을 실험적으로 조사한 결과를 다음과 같이 요약할 수 있다. 1. 환경비저항 1000 $\Omega$.cm 이하에서는 Zn합금양극이, 1000 $\Omega$.cm 이상에서는 Mg합금양극이 접지전지 설계에 좋다. 2. 비저항 500 $\Omega$.cm 이하에서는 Al합금양극이 Mg 합금양극보다 접지전지 설계를 위한 유전양극 특성이 좋으나 모든 비저항에서 Zn합금양극보다 특성이 떨어진다. 3. 배유전유밀도가 급격히 증가하는 일정인가전압은 다음과 같다. \circled1 E 하(Zn)=log (4.9465/$\rho$상(0.0639))+11$\times$10 상(-6)$\rho$상(0.8923i) \circled2 E 하(Al)=log (4.9306/$\rho$상(0.0525))+13$\times$10 상(-6)$\rho$상(0.9314i) \circled3 E 하(Mg)= log (3.7086/$\rho$상(0.0988))+181$\times$10 상(-6)$\rho$상(0.5406i) 4. 유전양극의 종류 및 환경의 비저항에 따라 인가전압과 배유전유밀도의 관계는 다음과 같은 일반식으로 표시할 수 있다. logi=g+root(n.E+r)

• 한국전기전자재료학회논문지
• /
• 제35권4호
• /
• pp.398-406
• /
• 2022

In order to increase the electrochemical performance of thermal battery anode, LIFT anode having the same weight but a larger lithium content in electrodes was fabricated by mixing lithium, iron and titanium. By applying these electrodes, a single cell and a thermal battery were prepared, and the effect of LIFT anode on electrochemical performance was evaluated. The LIFT-applied single cell presented a better cell performance than LIFe-applied single cell at 500℃ and 550℃. The discharge performance of LIFT-applied single cell, which included the operating time (787s), specific capacity (1,683 Asg^-1), and electrode utilization (80.7%), was improved collectively compared to the LIFe applied single cell (736s, 1,245 As g^-1, and 74.6%) at 500℃. As the discharge progressed, the internal resistance of LIFT anode decreased, because the lithium migration path was formed due to the presence of large titanium particles among iron particles. These results were analyzed in terms of the microstructure of electrode using SEM. Energy density of LIFT-applied single cell also increased by 10% to 142.1 Wh kg^-1 compared to that of LIFe-applied single cell (127.4 Wh kg^-1). In addition, the LIFT-applied single cell presented a stable discharge performance for 6,500s without a short circuit which could occur by molten lithium under an open circuit voltage condition with a high pressure (4 kgf cm^-2). As observed in the high temperature thermal battery performance tests, the voltage and specific capacity of LIFT-applied thermal battery are superior to those of LIFe-applied thermal batteries, indicating that the energy density of LIFT-applied thermal batteries should remarkably increase.

• 반도체디스플레이기술학회지
• /
• 제10권3호
• /
• pp.67-74
• /
• 2011

In this study, we have investigated the effect of the substrate temperature on the structural and the electrical characteristics of IZO thin films for the OLED (organic light emitting diodes) devices. For this purpose, IZO thin films were deposited by RF magnetron sputtering under various substrate temperature. The substrate temperature has been changed from room temperature to $400^{\circ}C$. Samples which were deposited under $250^{\circ}C$ show amorphous structure. The electrical resistivity of crystalline-IZO (c-IZO) film was higher than that of amorphous-IZO (a-IZO) film. And the electrical resistivity showed minimum value near $150^{\circ}C$ of deposition temperature. The OLED device was fabricated with different IZO substrates made by configuration of IZO/$\acute{a}$-NPD/DPVB/$Alq_3$/LiF/Al to elucidate the performance of IZO substrate. OLED devices with the amorphous-IZO (a-IZO) anode film show better current density-voltage-luminance characteristics than that of OLED devices with the commercial crystalline-ITO (c-ITO) anode film. It can be explained that very flat surface roughness and high work function of a-IZO anode film lead to more efficient hole injection by reduction of interface barrier height between anode and organic layers. This suggests that a-IZO film is a promising anode materials substituting conventional c-ITO anode in OLED devices.