• Title/Summary/Keyword: Al electrode

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DC Influence Between Pixel Electrode and Alignment Layer in In-plane Switching Mode LCD

  • Lim, Young-Nam;Lee, Tae-Rim;Park, Byoung-Gyu;Roh, Seung-Kwang;Kim, Hyun-Chul;Kim, Hyun-Seung;Kim, Kyeong-Jin;Shin, Hyun-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.677-680
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    • 2009
  • DC influence between pixel electrode and alignment layer (AL) in in-plane switching mode LCD was analyzed through DC equivalence-circuit equation induction, DC charge-discharge simulation, luminance and residual-DC measurement systems using test patterned (TP) cell. DC discharging rate (DDR) of single layer electrode was faster than that of double layer electrode and DDR of low resistance AL was faster than that of high resistance AL. DC discharging characteristics had a close relation to layer number and resistance between two electrodes.

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Preparation of Al Cathode for OLED by Sputtering Method (스퍼터링법을 이용한 OLED용 Al 음전극 제작)

  • Keum, Min-Jong;Kim, Kyung-Hwan
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.18 no.8
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    • pp.729-733
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    • 2005
  • Al electrode for OLED was deposited by FTS (Facing Targets Sputtering) system which can deposit thin films with low substrate damage. The Al thin films were deposited on the cell (LiF/EML/HTL/Bottom electrode) as a function of working gas such as Ar or Ar+kr mixed gas. Also Al thin films were prepared with working gas pressure (1, 6 mTorr). The film thickness and I-V curve of Al/cell were measured and evaluated. In the results, when Al thin films were deposited using pure Ar gas, the turn-on voltage of Al/cell was about 11 V. And using the Ar:Kr($75\%:25\%$) mixed gas, the turn-on voltage of Al/cell decreased to about 7 V.

Electrocoagulation of Disperse Dyebath Wastewater: Optimization of Process Variables and Sludge Production

  • Aygun, Ahmet;Nas, Bilgehan;Sevimli, Mehmet Faik
    • Journal of Electrochemical Science and Technology
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    • v.12 no.1
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    • pp.82-91
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    • 2021
  • This study was conducted to investigate the effect of initial pH, current density, and electrolysis time on process performance in terms of decolorization and chemical oxygen demand (COD) removal from disperse dyebath wastewater (DDW) by mono-polar parallel laboratory scale electrocoagulation (EC) process. COD reduction of 51.3% and decolorization of 92.8% were obtained with operating cost of 0.19 €/㎥ treated wastewater for Al-Al electrode pair, while 90.5% of decolorization and 49.2% of COD reduction were obtained with operating cost of 0.20 €/㎥ treated wastewater for an Fe-Fe electrode pair. The amount of sludge production were highly related to type of the electrode materials. At the optimum conditions, the amount of sludge produced were 0.18 kg/㎥ and 0.28 kg/㎥ for Al-Al and Fe-Fe electrode pairs, respectively. High decolorization can be explained by the hydrophobic nature of the disperse dye, while limited COD removal was observed due to the high dissolved organic matter of the DDW based on auxiliary chemicals. Energy, electrode, and chemical consumptions and sludge handling were considered as major cost items to find a cost-effective and sustainable solution for EC. The contribution of each cost items on operating cost were determined as 10.0%, 51.1%, 30.5% and 8.4% for Al-Al, and they were also determined as 9.0%, 38.0%, 40.5% and 12.5% for Fe-Fe, respectively. COD reduction and decolorization were fitted to first-order kinetic rule.

Effects of Process Variables on the Growth of Dendrite in the Electrochemical Alane(AlH3) Production Process (전기화학적 알레인(AlH3) 제조 공정에서 덴드라이트의 성장에 미치는 공정 변수 영향)

  • KIM, HYOSUB;PARK, HYUNGYU;PARK, CHUSIK;BAE, KIKWANG;KIM, YOUNGHO
    • Journal of Hydrogen and New Energy
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    • v.26 no.6
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    • pp.532-540
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    • 2015
  • Electrochemical alane ($AlH_3$) production process can be provided as a synthesis route which close a reversible cycle. In this study, growth inhibition of dendrite as key issues in this process was investigated. Main cause of dendrite growth was because Al fine powder separated in consumption process of Al electrode was moved to Pd electrode. In an effort to avoid this, use of glass block with uniform holes was the most effective to inhibit the amount of dendrite to that of $AlH_3$. Furthermore, effects of Al electrode (anode) type and electrolyte concentration were investigated and the optimal condition for inhibiting dendrite formation was proposed.

TFD Device with Symmetrical Structure of Flexible Electrode Subject to Flexible Substrate

  • Lee, Chan-Jae;Hong, Sung-Jei;Kim, Won-Keun;Han, Jeong-In
    • Transactions on Electrical and Electronic Materials
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    • v.3 no.4
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    • pp.32-35
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    • 2002
  • In this work, we test electrode material of TFD (Thin Film Diode) device subject to flexible substrate. Al, that is ductile metal, was proper for flexible electrode to fabricate flexible display. The fabricated devices had symmetric electrode structure on both sides of insulation layer. The electrode was made of ductile Al so as to reduce the mismatch of properties between the electrode and substrate. The TFD device was successfully fabricated applying our own etch-free process. Electrical properties were improved by post-annealing.

Al-foil Electrode for Detecting Partial Discharge in Middle Joint Box (초고압 전력케이블용 중간접속부내 부분방전 검출을 위한 박전극)

  • Shin, Hyun-Mahn;Kim, Hyang-Kon
    • Proceedings of the KIEE Conference
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    • 2008.09a
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    • pp.211-213
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    • 2008
  • To detect partial discharge of 154kV joint box, we have made experiment by using the Al-foil electrode sensor. Generally the signals which are detected in partial discharge test of underground power transmission cable are accompanied with both noises of high voltage and noises of surrounding power cable. The most noise in near to end part of joint box is corona, beside other noises flowed from surrounding area. Partial discharge test is difficulty due to these noises. First, we had used Al-Foil sensor on middle joint box of 154[kV] underground transmission power cable, and then analysed reliability of calibration signal by using the Al-Foil electrode sensor of NJB. From above results, decrement properties measured highly. But incase of injecting calibration signal of 500[pC] after measuring signals in IJB, the S/N ratio had about 25[dB] acquisition.

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Study on the High Efficiency of Anode Phosphor Electrode for Filed Emission Lamp (I) Metal Layer (전계방출광원용 고효율 에노드 형광막 특성 연구(I) - 금속막)

  • Lee, Sun-Hee;Kim, Kwang-Bok;Kim, Yong-Won;You, Yong-Chan
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.05a
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    • pp.7-10
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    • 2007
  • The electron charging and degradation of anode phosphor layers are showed major problems in high electric field with anode electrode of field emission devices. An Al metal layer on the phosphor layer may get rid of these problems. This Al metal layer are formed with the roughness of phosphor surface layer without interlayer and cannot be given rise to enhance the luminance efficiency. In order to enhance the brightness, an anode layer need to be flated between phosphor layer and Al metal layer in anode electrode. After optimizing the anode phosphor layer, an anode layer with Al metal and inter layer increased the brightness and luminescence efficiency 1.5 times more than only phosphor layer in anode.

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Effect of Alloying Elements on the Electrochemical Characteristics of an Al Alloy Electrode for Al-air Batteries in 4 M NaOH solution

  • Choi, Yun-Il;Kalubarme, R.S.;Jang, Hee-Jin;Park, Chan-Jin
    • Korean Journal of Metals and Materials
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    • v.49 no.11
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    • pp.839-844
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    • 2011
  • We examined the effects of alloying elements such as Fe, Ga, In, Sn, Mg, and Mn on the electrochemical characteristics of Al-based alloys for Al-air batteries by potentiodynamic polarization tests and electrochemical impedance spectroscopy. The corrosion potential of an Al anode was lowered by the addition of Ga and Sn, resulting in an increase in the cell voltage compared with a pure Al electrode. Fe was not beneficial to improve the electrochemical properties of the Al anode in that it caused a decrease in the cell voltage and reduced corrosion rate slightly. In, Mn, Sn, and Mg decreased the corrosion rate of the Al alloys, while Ga enhanced corrosion significantly and accelerated consumption of the anode.

A Study of Interface Layer on CdZnTe Radiation Sensor for Potable Isotope Identifier (이동형 핵종 분석 장치용 CZT 반도체 검출기의 완충전극에 대한 연구)

  • Cho, Yun Ho;Park, Se-Hwan;Kim, Yong Kyun;Ha, Jang Ho
    • Journal of Radiation Industry
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    • v.5 no.1
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    • pp.95-99
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    • 2011
  • The electrical and mechanical properties of electrode for radiation detection are very important. In general, Au electrode and CZT crystal are combined to form ohmic contacts, and the best energy resolution is shown at the Au electrode. The metal contacts are fabricated by electroless deposition method, sputtering deposition method and thermal evaporation method. The electrode fabrication is easy with use of the thermal evaporation method, while an adhesive strength is weak. Thus interface materials such as Ag, Al and Ni were investigated to overcome defects generated by the this method. The thickness of the interface material between the Au electrode and the CZT crystal was 100 Angstroms, the Au electrode with thickness of 400 Angstroms was deposited. The Al+Au electrode is shown that the results of current-voltage and radiation response are similar to results of Au electrode.

Dielectric properties of Pt/PVDF/Pt modified by low energy ion beam irradiation

  • Sung Han;Yoon, Ki-Hyun;Jung, Hyung-Jin;Koh, Seok-Keun
    • Proceedings of the Korean Vacuum Society Conference
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    • 1999.07a
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    • pp.110-110
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    • 1999
  • Polyvinylidenefluoride (PVDF) is most used in piezoelectric polymer industry. Electrode effect on the electrical properties of PVDF has been investigated. al has been used due to fair adhesion for PVDF. Work function of metal plays an important role on the electrical properties of ferroelectrics for top and /or bottom electrode. However, Al has much lower work function than Pt or Au and so leakage current of Al/PVDF/Al may be large. Pt or Au has not been used for electrode of PVDF system due to poor adhesion. PVDF irradiated by Ar+ ion beam with O2 environment takes good adhesion to inert metal. Contact angle of PVDF to triple distilled water was reduced from 75$^{\circ}$ to 31$^{\circ}$ at 1$\times$1015 Ar+/cm2. Working pressure was 2.3$\times$10-4 Torr and base pressure was 5$\times$10-6 Torr. Pt was deposited by ion beam sputtering and thickness of pt film was about 1000$\AA$. in previous study, enhancing adhesion of Pt on PVDF was shown. in this study, effect of electrode on PVDF will be represented.

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