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Equivalent series resistance

About: Equivalent series resistance is a research topic. Over the lifetime, 5335 publications have been published within this topic receiving 83362 citations. The topic is also known as: ESR.


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Journal ArticleDOI
TL;DR: In this paper, the influence of buffer layers on the performance of polymer photovoltaic devices based on blends of poly3-hexylthiophene and 6,6-phenyl-C-61-buytyric acid methyl ester has been investigated.
Abstract: The influence of anode buffer layers on the performance of polymer photovoltaic devices based on blends of poly3-hexylthiophene and 6,6-phenyl-C-61-buytyric acid methyl ester has been investigated. The buffer layers consist of poly3,4-ethylenedioxythiophene:polystyrenesulfonate PEDOT-PSS doped with different concentrations of mannitol. Improved power conversion efficiency, up to 5.2%, has been observed by reducing the resistance of PEDOT:PSS after doping. One extrapolation method has been developed to exclude the resistance from the connection of the electrodes from the total device resistance. The results confirm that the device improvement is due to the reduction of series resistance of the PEDOT:PSS after the mannitol doping. © 2007 American Institute of Physics. DOI: 10.1063/1.2437703 Organic photovoltaic devices PVs have attracted considerable attention due to their potential for flexible, lightweight, and low-cost applications of solar energy conversion. Recently, the power conversion efficiency PCE of photovoltaic cells around 5% has been realized. 1,2 In addition, through the optimization of the donor/acceptor energy levels, the efficiency up to 10% is expected from recent simulation

151 citations

Journal ArticleDOI
TL;DR: In this paper, the performance of organic solar cells based on pentacene/C60 heterojunctions as a function of active area was analyzed in terms of the power loss density.
Abstract: We report on the performance of organic solar cells based on pentacene/C60 heterojunctions as a function of active area. Devices with areas of 0.13 and 7 cm2 were fabricated on indium-tin-oxide (ITO) coated glass. Degradation of the performance with increased area is observed and analyzed in terms of the power loss density concept. The various power loss contributions to the total series resistance (RSA) are measured independently and compared to the values of the series resistance extracted from the current-voltage characteristics using a Shockley equivalent circuit model. The limited sheet resistance of ITO is found to be one of the major limiting factors when the area of the cell is increased. To reduce the effects of series resistance, thick, electroplated, metal grid electrodes were integrated with ITO in large-area cells. The metal grids were fabricated directly onto ITO and passivated with an insulator to prevent electrical shorts during the deposition of the top Al electrode. By integrating metal ...

150 citations

Proceedings ArticleDOI
17 Jun 2001
TL;DR: In this paper, the most important polymer film used in commercial capacitors is the biaxially-oriented polypropylene, which is also used for metallized capacitors, depending on application.
Abstract: Summary form only given, as follows. The most important polymer film used in commercial capacitors is the biaxially-oriented polypropylene. Other materials, such as polyesters or paper, are also used for metallized capacitors, depending on application. Polypropylene has the big advantage to be economically less expensive than the other listed materials and to have a very low equivalent series resistance (ESR) because of the propylene repeating group, which result in a regular polymer chain. Electrical breakdown behaviour will be analysed in order to improve the dielectric strength and current performance. Performance versus energy density will be investigated too. It will be given an outlook to the new proposals in the field of films, considering their supposed better dielectric and mechanical performance.

149 citations

Journal ArticleDOI
15 Oct 2007
TL;DR: In this paper, a preventive maintenance strategy for the sensorless condition monitoring of inverter dc-link aluminum electrolytic capacitors based on equivalent series resistance (ESR) and capacitance C estimation is proposed.
Abstract: A new preventive maintenance strategy for the sensorless condition monitoring of inverter dc-link aluminum electrolytic capacitors based on equivalent series resistance (ESR) and capacitance C estimation is proposed. The main concept of the proposed method is to estimate the ESR and C of the capacitor, using the inverter whenever the motor is stopped. The parameters are estimated from the dc-link voltage and stator current measurements available in the inverter with the switched dc-link voltage applied to the motor stator winding. The temperature of the capacitor can also be estimated under thermal equilibrium based on the stator resistance estimate to take the influence of temperature variation into account. An experimental study on a 250-W permanent magnet synchronous motor performed under accelerated capacitor degradation is presented to verify the proposed technique. It is shown that the proposed method provides a reliable and sensitive indication of capacitor aging without additional hardware requirements for reliable, efficient, and safe operation of the inverter and driven process.

147 citations

Journal ArticleDOI
TL;DR: In this paper, an atomic-layer deposition (ALD) was used to achieve an ultra-high capacitance density of 440 at a breakdown voltage VDB > 6 V on a silicon substrate containing high-aspect-ratio macropore arrays.
Abstract: ldquoTrenchrdquo capacitors containing multiple metal-insulator-metal (MIM) layer stacks are realized by atomic-layer deposition (ALD), yielding an ultrahigh capacitance density of 440 at a breakdown voltage VDB > 6 V. This capacitance density on silicon is at least 10times higher than the values reported by other research groups. On a silicon substrate containing high-aspect-ratio macropore arrays, alternating MIM layer stacks comprising high-k Al2O3dielectrics and TiN electrodes are deposited using optimized ALD processing such that the conductivity of the TiN layers is not attacked. Ozone annealing subsequent to each Al2O3 deposition step yields significant improvement of the dielectric isolation and breakdown properties.

146 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023121
2022235
2021126
2020170
2019171
2018206