The Experts below are selected from a list of 993 Experts worldwide ranked by ideXlab platform
Eung Yeoul Yoon - One of the best experts on this subject based on the ideXlab platform.
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fabrication of conductive metal lines by plate to roll pattern transfer utilizing edge dewetting and Flexographic Printing
Journal of Colloid and Interface Science, 2010Co-Authors: Moon Kyu Kwak, Kyu Ho Shin, Eung Yeoul YoonAbstract:We present a simple Flexographic Printing method mediated by edge dewetting for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material under conformal contact with a patterned elastomeric mold (e.g., polydimethylsiloxane, PDMS), the liquid ink layer is broken and then selectively wets the protruding part of the mold with high fidelity. Subsequently, a thin photoresist layer that is coated on 300 mm-diameter aluminum cylinder is brought in contact with the ink-coated PDMS mold, resulting in a plate-to-roll pattern transfer without collapse or merging of neighboring features. Using this method, conductive silver lines are fabricated on the cylindrical surface with the resolution of ∼20 μm and the sheet resistance less than ∼4.3 Ω after 10 repeated transfer cycles.
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Fabrication of conductive metal lines by plate-to-roll pattern transfer utilizing edge dewetting and Flexographic Printing
Journal of Colloid and Interface Science, 2010Co-Authors: Moon Kyu Kwak, Eung Yeoul Yoon, Kyu Ho Shin, Kahp Y. SuhAbstract:We present a simple Flexographic Printing method mediated by edge dewetting for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material under conformal contact with a patterned elastomeric mold (e.g., polydimethylsiloxane, PDMS), the liquid ink layer is broken and then selectively wets the protruding part of the mold with high fidelity. Subsequently, a thin photoresist layer that is coated on 300 mm-diameter aluminum cylinder is brought in contact with the ink-coated PDMS mold, resulting in a plate-to-roll pattern transfer without collapse or merging of neighboring features. Using this method, conductive silver lines are fabricated on the cylindrical surface with the resolution of ∼20 μm and the sheet resistance less than ∼4.3 Ω after 10 repeated transfer cycles. © 2009 Elsevier Inc. All rights reserved.
Moon Kyu Kwak - One of the best experts on this subject based on the ideXlab platform.
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fabrication of conductive metal lines by plate to roll pattern transfer utilizing edge dewetting and Flexographic Printing
Journal of Colloid and Interface Science, 2010Co-Authors: Moon Kyu Kwak, Kyu Ho Shin, Eung Yeoul YoonAbstract:We present a simple Flexographic Printing method mediated by edge dewetting for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material under conformal contact with a patterned elastomeric mold (e.g., polydimethylsiloxane, PDMS), the liquid ink layer is broken and then selectively wets the protruding part of the mold with high fidelity. Subsequently, a thin photoresist layer that is coated on 300 mm-diameter aluminum cylinder is brought in contact with the ink-coated PDMS mold, resulting in a plate-to-roll pattern transfer without collapse or merging of neighboring features. Using this method, conductive silver lines are fabricated on the cylindrical surface with the resolution of ∼20 μm and the sheet resistance less than ∼4.3 Ω after 10 repeated transfer cycles.
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Fabrication of conductive metal lines by plate-to-roll pattern transfer utilizing edge dewetting and Flexographic Printing
Journal of Colloid and Interface Science, 2010Co-Authors: Moon Kyu Kwak, Eung Yeoul Yoon, Kyu Ho Shin, Kahp Y. SuhAbstract:We present a simple Flexographic Printing method mediated by edge dewetting for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material under conformal contact with a patterned elastomeric mold (e.g., polydimethylsiloxane, PDMS), the liquid ink layer is broken and then selectively wets the protruding part of the mold with high fidelity. Subsequently, a thin photoresist layer that is coated on 300 mm-diameter aluminum cylinder is brought in contact with the ink-coated PDMS mold, resulting in a plate-to-roll pattern transfer without collapse or merging of neighboring features. Using this method, conductive silver lines are fabricated on the cylindrical surface with the resolution of ∼20 μm and the sheet resistance less than ∼4.3 Ω after 10 repeated transfer cycles. © 2009 Elsevier Inc. All rights reserved.
Kahp Y. Suh - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of conductive metal lines by plate-to-roll pattern transfer utilizing edge dewetting and Flexographic Printing
Journal of Colloid and Interface Science, 2010Co-Authors: Moon Kyu Kwak, Eung Yeoul Yoon, Kyu Ho Shin, Kahp Y. SuhAbstract:We present a simple Flexographic Printing method mediated by edge dewetting for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material under conformal contact with a patterned elastomeric mold (e.g., polydimethylsiloxane, PDMS), the liquid ink layer is broken and then selectively wets the protruding part of the mold with high fidelity. Subsequently, a thin photoresist layer that is coated on 300 mm-diameter aluminum cylinder is brought in contact with the ink-coated PDMS mold, resulting in a plate-to-roll pattern transfer without collapse or merging of neighboring features. Using this method, conductive silver lines are fabricated on the cylindrical surface with the resolution of ∼20 μm and the sheet resistance less than ∼4.3 Ω after 10 repeated transfer cycles. © 2009 Elsevier Inc. All rights reserved.
Kyu Ho Shin - One of the best experts on this subject based on the ideXlab platform.
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fabrication of conductive metal lines by plate to roll pattern transfer utilizing edge dewetting and Flexographic Printing
Journal of Colloid and Interface Science, 2010Co-Authors: Moon Kyu Kwak, Kyu Ho Shin, Eung Yeoul YoonAbstract:We present a simple Flexographic Printing method mediated by edge dewetting for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material under conformal contact with a patterned elastomeric mold (e.g., polydimethylsiloxane, PDMS), the liquid ink layer is broken and then selectively wets the protruding part of the mold with high fidelity. Subsequently, a thin photoresist layer that is coated on 300 mm-diameter aluminum cylinder is brought in contact with the ink-coated PDMS mold, resulting in a plate-to-roll pattern transfer without collapse or merging of neighboring features. Using this method, conductive silver lines are fabricated on the cylindrical surface with the resolution of ∼20 μm and the sheet resistance less than ∼4.3 Ω after 10 repeated transfer cycles.
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Fabrication of conductive metal lines by plate-to-roll pattern transfer utilizing edge dewetting and Flexographic Printing
Journal of Colloid and Interface Science, 2010Co-Authors: Moon Kyu Kwak, Eung Yeoul Yoon, Kyu Ho Shin, Kahp Y. SuhAbstract:We present a simple Flexographic Printing method mediated by edge dewetting for potential applications to roll-to-roll or plate-to-roll pattern transfer. By controlling dewetting of a thin, conductive ink material under conformal contact with a patterned elastomeric mold (e.g., polydimethylsiloxane, PDMS), the liquid ink layer is broken and then selectively wets the protruding part of the mold with high fidelity. Subsequently, a thin photoresist layer that is coated on 300 mm-diameter aluminum cylinder is brought in contact with the ink-coated PDMS mold, resulting in a plate-to-roll pattern transfer without collapse or merging of neighboring features. Using this method, conductive silver lines are fabricated on the cylindrical surface with the resolution of ∼20 μm and the sheet resistance less than ∼4.3 Ω after 10 repeated transfer cycles. © 2009 Elsevier Inc. All rights reserved.
Andreas Lorenz - One of the best experts on this subject based on the ideXlab platform.
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Flexographic Printing – towards an advanced front side metallization approach with high throughput and low silver consumption
Solar Energy Materials and Solar Cells, 2016Co-Authors: Andreas Lorenz, A Senne, C. Gredy, S. Beyer, P. Papet, J. Ufheil, Holger Reinecke, Florian ClementAbstract:Abstract Rotational Flexographic Printing technology is a highly promising approach to increase the productivity of the cost-intensive solar cell metallization process. The ability to realize narrow contact fingers with very low silver consumption makes this technology particularly attractive for the front side metallization of busbarless solar cells in combination with multi-wire interconnection like Meyer Burger’s SmartWire Connection Technology (SWCT). Within this work, we investigate the feasibility of this approach on solar cells with 156 mm edge length. Two types of silver inks are prepared and evaluated with focus on optical and electrical properties of the printed front side grid. Both inks achieve sufficient lateral finger resistances below 20 Ω/cm. A low specific contact resistance of ρ c,95% =3.0±0.6 m Ω cm 2 is obtained with ink A. Using Flexographic Printing, Aluminum back surface field Czrochalski-grown Silicon busbarless solar cells with a maximum conversion efficiency of η =19.4% ( η ∅ =19.0%) are fabricated and interconnected to a mini-module. The mini-module obtains an aperture conversion efficiency of η =15.8%. The origin of the cell-to-module (CTM) losses are examined in detail. It is shown that a certain part of the CTM-losses originates from the characteristics of the used Grid TOUCH I–V-measurement device. Further sources of possible CTM losses are investigated using electroluminescence measurement (EL) and discussed in detail.
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evaluation of Flexographic Printing technology for multi busbar solar cells
Energy Procedia, 2015Co-Authors: Andreas Lorenz, Florian Clement, A Senne, J Rohde, S Kroh, M Wittenberg, K Kruger, D BiroAbstract:Abstract Rotational Flexographic Printing is a promising high-throughput technology for the front side metallization of silicon solar cells. Very low silver consumption and the possibility to realize narrow contact fingers make this technology particularly interesting for multi-busbar solar cells. Within this work, fundamental Printing tests have been carried out on a Flexographic roll-to-flat machine using an experimental anilox roll and elastomeric laser-engraved Printing plates. A double Printing process with intermediate drying step has been applied. Contact fingers down to 33 μm in width and up to 8 μm in height have been realized using this technology. Lateral resistances in the range 500 to 1500 Ω/m have been determined by four point measurement method. These results underline the capability of Flexographic Printing for fine line metallization of multi-busbar solar cells.
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Flexographic Printing high throughput technology for fine line seed layer Printing on silicon solar cells
World Conference on Photovoltaic Energy Conversion, 2013Co-Authors: D Biro, Florian Clement, M Dreher, D Wolf, Jonas Bartsch, Achim Kraft, S Nold, G T Hofmeister, Andre Kalio, Andreas LorenzAbstract:Within this work, seed layer grids for solar cell front side metallization were applied using Flexographic Printing which represents an innovative, high-throughput approach for solar cell front side metallization. Fine line seed layer contact grids with a silver consumption lower than 10 mg per cell could be realized on alkaline textured Czochralski-grown silicon wafers with an edge length of 156 mm. Subsequently, the seed layer has been reinforced with silver using light induced plating (LIP). In order to determine the optimum LIP process, three groups were plated with different amounts of silver deposition. The results were analyzed before and after plating regarding silver consumption, contact finger geometry and interruptions. Solar cell parameters were determined after plating. It was demonstrated, that a homogeneous front side seed layer metallization without interruptions down to a line width of 25 μm can be realized using Flexographic Printing. The best cell reached a conversion efficiency of 18 % after silver LIP which is comparable to standard screen printed cells on the used Si wafer material. Furthermore, an economic comparison was carried out to illustrate the potential of solar cell metallization using rotational Printing methods with subsequent Ag-LIP or Ni/Cu/Ag-LIP compared to state-of-the-art screen Printing technology.
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Flexographic Printing – High Throughput Technology for Fine Line Seed Layer Printing on Silicon Solar Cells
2013Co-Authors: Daniel Biro, Florian Clement, M Dreher, D Wolf, Jonas Bartsch, Achim Kraft, S Nold, G T Hofmeister, Andre Kalio, Andreas LorenzAbstract:Within this work, seed layer grids for solar cell front side metallization were applied using Flexographic Printing which represents an innovative, high-throughput approach for solar cell front side metallization. Fine line seed layer contact grids with a silver consumption lower than 10 mg per cell could be realized on alkaline textured Czochralski-grown silicon wafers with an edge length of 156 mm. Subsequently, the seed layer has been reinforced with silver using light induced plating (LIP). In order to determine the optimum LIP process, three groups were plated with different amounts of silver deposition. The results were analyzed before and after plating regarding silver consumption, contact finger geometry and interruptions. Solar cell parameters were determined after plating. It was demonstrated, that a homogeneous front side seed layer metallization without interruptions down to a line width of 25 μm can be realized using Flexographic Printing. The best cell reached a conversion efficiency of 18 % after silver LIP which is comparable to standard screen printed cells on the used Si wafer material. Furthermore, an economic comparison was carried out to illustrate the potential of solar cell metallization using rotational Printing methods with subsequent Ag-LIP or Ni/Cu/Ag-LIP compared to state-of-the-art screen Printing technology.