• Title/Summary/Keyword: electrode thickness

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Electrode Thickness Optimization at Full Color OLED and Analysis of Power Consumption

  • Park, Sung-Joon;Kim, Ok-Tae;Kim, Hee-Je
    • KIEE International Transactions on Electrophysics and Applications
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    • v.4C no.3
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    • pp.106-110
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    • 2004
  • The operating condition of the OLED (organic light-emitting diode) is very sensitive to electrode thickness properties. The electrode thickness is a significant issue in the construction of OLEDs because of its transparency, high conductivity and high efficiency as an injector into organic materials. We carried out a systematic study to optimize the electrode thickness conditions in Indiumtin oxide (ITO), Molybdenum (Mo) and Aluminum (Al). Further, we measured electrode thickness under standard conditions [ITO 1500$\AA$, Mo 2600$\AA$, Al 1500$\AA$]. We also evaluated power consumption. In addition, we analyzed substrate uniformity with IVL measurement results. From these results, it is known that the electrode thickness should be optimized in order to accomplish optimal power efficiency.

Effect of LiCoO2 Cathode Density and Thickness on Electrochemical Performance of Lithium-Ion Batteries

  • Choi, Jaecheol;Son, Bongki;Ryou, Myung-Hyun;Kim, Sang Hern;Ko, Jang Myoun;Lee, Yong Min
    • Journal of Electrochemical Science and Technology
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    • v.4 no.1
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    • pp.27-33
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    • 2013
  • The consequences of electrode density and thickness for electrochemical performance of lithium-ion cells are investigated using 2032-type coin half cells. While the cathode composition is maintained by 90:5:5 (wt.%) with $LiCoO_2$ active material, Super-P electric conductor and polyvinylidene fluoride polymeric binder, its density and thickness are independently controlled to 20, 35, 50 um and 1.5, 2.0, 2.5, 3.0, 3.5 g $cm^{-3}$, respectively, which are based on commercial lithium-ion battery cathode system. As the cathode thickness is increased in all densities, the rate capability and cycle life of lithium-ion cells become significantly worse. On the other hand, even though the cathode density shows similar behavior, its effect is not as high as the thickness in our experimental range. This trend is also investigated by cross-sectional morphology, porosity and electric conductivity of cathodes with different densities and thicknesses. This work suggests that the electrode density and thickness should be chosen properly and mentioned in detail in any kinds of research works.

A study on the Conversion Loss by the Thickness of the Bonding Medium in the Elastic Delay Lines. (탄성파지연선에서 접착제의 두께에 의한 변환손실에 관하여)

  • 김종상;이전영
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.13 no.6
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    • pp.1-6
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    • 1976
  • In this paper, the methode of calculating conversion loss is proposed by considering the thickness of bonding medium between electrode and delay material in the vibrator of Elastic delay lines. As the result of computations using digital computer, it is shown that the thickness of bonding medium must be less than about 1/100 of the thickness of vibrator and when the thickness of electrode is about 1110 of vibrator, the center fnequency is shifted. When the thickness of bonding medium is equal to or more than the thickness of vibrator, the 리uctuations in frequency Bandwidth become larger and larger.

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Cetylpyridinium Son-Selective Electrode Based on Dibenzo-18-Crown-6 in PVC Membrane for Auto Control of The Chemical Plants (화학설비의 자동제어를 위한 Dibenzo-18-Crown-6를 이용한 Cetylpyridinium 이온 선택성 PVC막 전극)

  • 안형환;우인성
    • Journal of the Korean Society of Safety
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    • v.9 no.1
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    • pp.68-75
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    • 1994
  • The cetylpyridium ion-selective electrode were developed by dibenzo-18-crown-6 for auto control of the chemical plants. The effect of content of active material and the membrane thickness on the response characteristics of electrode such as the linear reponse range, the detection limit, and Nemstian slope of the electrod, were studied. The electrode characteristics was better with decreasing the content of active material above the optimum content, but became worse below these. DBP was best as a plasticizer, The effect of the membrane thickness on the electrode characteristics was improved with decreasing the membrane thickness, but below the optimum membrane thickness the electrode exhibited an inverse trend.

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DSSCs Efficiency by Tape Casting Pt Counter Electrode and Different Thickness Between Two Substrates (Pt 상대전극 성막 두께와 두 기판 간격에 따른 DSSC의 효율 특성)

  • Kwon, Sung-Yeol;Yang, Wook;Zhou, Zeyuan
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.3
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    • pp.209-215
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    • 2013
  • DSSCs electrical characteristics and efficiency fabricated with different tape casting thickness Pt counter electrodes and different thickness between $TiO_2$ photo electrode and Pt counter electrode substrate were studied. 1 layer Pt counter electrode shows 3.979% efficiency. Efficiency increased as tape casting thickness decreased. The lowest open-circuit voltage was a 0.726 V and the highest short-circuit current was a 2.188 mA on 1 layer Pt counter electrode. On the different thickness between two substrates, the lowest open-circuit voltage 0.712 V and the highest short-circuit current 2.787 mA was measured at $60{\mu}m$ surlyn film thickness and it shows the highest value of 5.067% efficiency.

Influence of the Thin-Film Ag Electrode Deposition Thickness on the Current Characteristics of a CVD Diamond Radiation Detector

  • Ban, Chae-Min;Lee, Chul-Yong;Jun, Byung-Hyuk
    • Journal of Radiation Protection and Research
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    • v.43 no.4
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    • pp.131-136
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    • 2018
  • Background: We investigated the current characteristics of a thin-film Ag electrode on a chemical vapor deposition (CVD) diamond. The CVD diamond is widely recognized as a radiation detection material because of its high tolerance against high radiation, stable response to various dose rates, and good sensitivity. Additionally, thin-film Ag has been widely used as an electrode with high electrical conductivity. Materials and Methods: Considering these properties, the thin-film Ag electrode was deposited onto CVD diamonds with varied deposition thicknesses (${\fallingdotseq}50/98/152/257nm$); subsequently, the surface thickness, surface roughness, leakage current, and photo-current were characterized. Results and Discussion: The leakage current was found to be very low, and the photo-current output signal was observed as stable for a deposited film thickness of 98 nm; at this thickness, a uniform and constant surface roughness of the deposited thin-film Ag electrode were obtained. Conclusion: We found that a CVD diamond radiation detector with a thin-film Ag electrode deposition thickness close to 100 nm exhibited minimal leakage current and yielded a highly stable output signal.

Partial Discharge Characteristics of Ultra-High Voltage Cable Insulators by Needle Electrode (침 전극에 의한 초고압 케이블 절연재료의 부분방전 특성)

  • Kim, Gyun-Sig;Choi, Beom-Kyu;Byun, Doo-Gyoon;Cho, Kyung-Soon;Kim, Gwi-Yeol;Lee, Chung-Ho;Hong, Jin-Woong
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2004.07a
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    • pp.477-480
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    • 2004
  • In other to estimate an electrical properties of the cross linked polyethylene cable, the partial discharge properties due to charge of electrode shape(needle and bar) and void size were investigated at room temperature. Fast trip and breakdown time were appeared by the closed of needle electrode. The trip and breakdown voltage depend on insulator thickness. As the result, confirmed larger effect of void size than effect of insulator thickness. The effect of voids size than influence of insulation thickness was dominated by internal an electrode of inner insulators.

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Effects of Dielectric Layer Thickness and Electrode Structures on High Xe AC-PDP (High Xe AC PDP에서 전극구조와 유전체 두께에 따른 방전 특성 분석)

  • Heo, Jun;Kim, Yun-Gi;Kim, Dong-Hyun;Lee, Hea-June;Lee, Ho-Jun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.2
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    • pp.237-242
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    • 2012
  • In this paper, we investigated effects of ITO electrode geometry and dielectric layer thickness on the discharge Characteristic of AC PDP. As the dielectric thickness is decreased ($30{\sim}12{\mu}m$), firing and sustain voltage is decreased. Luminance and discharge power increase with decreasing dielectric layer thickness because of increasing capacitance between plasma and electrodes. Reactive power decreases with dielectric thickness due to reduced capacitance between sustain electrodes. For the high Xe test panel with small ITO electrode, luminous efficacy as well as luminance increase with decreasing dielectric layer thickness. This result suggest that high power density and small plasma volume is beneficial for high efficacy discharge.

Model Prediction and Experiments for the Electrode Design Optimization of LiFePO4/Graphite Electrodes in High Capacity Lithium-ion Batteries

  • Yu, Seungho;Kim, Soo;Kim, Tae Young;Nam, Jin Hyun;Cho, Won Il
    • Bulletin of the Korean Chemical Society
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    • v.34 no.1
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    • pp.79-88
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    • 2013
  • $LiFePO_4$ is a promising active material (AM) suitable for use in high performance lithium-ion batteries used in automotive applications that require high current capabilities and a high degree of safety and reliability. In this study, an optimization of the electrode design parameters was performed to produce high capacity lithium-ion batteries based on $LiFePO_4$/graphite electrodes. The electrode thickness and porosity (AM density) are the two most important design parameters influencing the cell capacity. We quantified the effects of cathode thickness and porosity ($LiFePO_4$ electrode) on cell performance using a detailed one-dimensional electrochemical model. In addition, the effects of those parameters were experimentally studied through various coin cell tests. Based on the numerical and experimental results, the optimal ranges for the electrode thickness and porosity were determined to maximize the cell capacity of the $LiFePO_4$/graphite lithium-ion batteries.

Electrical and thermal characteristics of PRAM with thickness of phase change thin film (상변화 박막의 두께에 따른 상변화 메모리의 전류 및 열 특성)

  • Choi, Hong-Kyw;Kim, Hong-Seung;Lee, Seong-Hwan;Jang, Nak-Won
    • Journal of Advanced Marine Engineering and Technology
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    • v.32 no.1
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    • pp.162-168
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    • 2008
  • In this paper, we analyzed the heat transfer phenomenon and the reset current variation of PRAM device with thickness of phase change material using the 3-D finite element analysis tool. From the simulation, Joule's heat was generated at the contact surface of phase change material and bottom electrode of PRAM. As the thickness of phase change material was decreased, the reset current was highly increased. In case thickness of phase change material thin film was $200\;{\AA}$, heat increased through top electrode and reset current caused by phase transition highly increased. And as thermal conductivity of top electrode decreased, temperature of unit memory cell was increased.