Practical Design Guidelines for the Development of High-Precision Roll-to-Roll Slot-Die Coating Equipment and the Process

2016 ◽  
Vol 6 (11) ◽  
pp. 1677-1686 ◽  
Author(s):  
Jinwoo Seong ◽  
Janghoon Park ◽  
Jongsu Lee ◽  
Byoungjoon Ahn ◽  
Joong Hyun Yeom ◽  
...  
Keyword(s):  
High Precision ◽  
Design Guidelines ◽  
Slot Die Coating ◽  
Roll To Roll ◽  
Practical Design ◽  
Slot Die

A one-step roll-to-roll process of stable AgNW/PEDOT:PSS solution using imidazole as a mild base for highly conductive and transparent films: optimizations and mechanisms

2015 ◽  
Vol 3 (22) ◽  
pp. 5859-5868 ◽  
Author(s):  
Seyul Kim ◽  
So Yeon Kim ◽  
Moon Hyun Chung ◽  
Jeonghun Kim ◽  
Jung Hyun Kim
Keyword(s):  
Optical Properties ◽  
Electrical And Optical Properties ◽  
Transparent Films ◽  
Slot Die Coating ◽  
Roll To Roll ◽  
Transparent Conducting ◽  
Slot Die ◽  
Coating Method ◽  
One Step

An AgNW/PEDOT:PSS coated, transparent, conducting, roll film (460 mm in width × 20 m in length) with good electrical and optical properties was produced using the roll-to-roll slot-die coating method.

scholarly journals Transmittance Control of a Water-Repellent-Coated Layer on a Tensioned Web in a Roll-to-Roll Slot-Die Coating System

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 4003
Author(s):  
Seongyong Kim ◽  
Minho Jo ◽  
Jongsu Lee ◽  
Changwoo Lee
Keyword(s):  
Contact Angle ◽  
Solar Cells ◽  
Control Method ◽  
Dominant Factor ◽  
Water Repellent ◽  
Process Conditions ◽  
Slot Die Coating ◽  
Roll To Roll ◽  
Slot Die ◽  
Transparent Water

Solar cells are important alternatives to fossil fuels for energy generation in today’s world, where the demand for alternative, renewable sources of energy is increasing. However, solar cells, which are installed outdoors, are susceptible to pollution by environmental factors. A solution to overcome this limitation involves coating solar cell surfaces with functional coatings. In this study, we propose a transmittance control method for a tensioned web in a roll-to-roll, transparent, water-repellent film coating. First, we analyzed the effects of process conditions on the transmittance and contact angle of the transparent water-repellent film during roll-to-roll slot-die coating. It was confirmed that the tension was the most dominant factor, followed by the coating gap. Through the tension control, the transmittance was changed by 3.27%, and the contact angle of the DI water was changed by 17.7°. In addition, it was confirmed that the transmittance was changed by 0.8% and the contact angle of DI water by 3.9° via the coating gap control. Based on these results, a transmittance prediction model was developed according to the tension and coating gap, and was then verified experimentally. Finally, a water-repellent film with a high transmittance of 89.77% was obtained using this model.

Meniscus Guide Slot-Die Coating For Roll-to-Roll Perovskite Solar Cells

MRS Advances ◽  
2019 ◽  
Vol 4 (24) ◽  
pp. 1399-1407 ◽  
Author(s):  
Daniel Burkitt ◽  
Peter Greenwood ◽  
Katherine Hooper ◽  
David Richards ◽  
Vasil Stoichkov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Deposition Process ◽  
Low Flow ◽  
Plastic Substrate ◽  
Lead Iodide ◽  
Perovskite Layer ◽  
Slot Die Coating ◽  
Roll To Roll ◽  
Slot Die

Abstract:Roll-to-roll slot-die coating with a meniscus guide is used to deposit several layers in a P-I-N perovskite solar cell stack, including the perovskite layer. The use of various length meniscus guides as part of the slot-die head allows controlled coating of these layers at a common coating speed. The length of meniscus guide used is optimised and related to the rheology of the coated ink and appropriate choice of meniscus guide length provides a way to avoid flooding of the coated area and improve coating definition. Initial coating trial results suggest the low-flow limit of slot-die coating is still applicable when using a meniscus guide, which is an important and previously unreported observation, application of this theory to meniscus guide coating provides a useful tool for rapidly determining the appropriate coating conditions that can be used as part of a manufacturing process. This is further explored through the deposition of perovskite solar cells by roll-to-roll slot-die coating. The perovskite layer is deposited using a sequential slot-die deposition process using a low toxicity dimethyl sulfoxide ink for the lead iodide layer, it is found that increasing the drying oven temperature and air flow rate can be used to improve the uniformity of the layer but this can also result in deformation of the plastic substrate. Functioning perovskite solar cells are demonstrated using this technique, but a large variation is found between device performances which is attributed to the poor uniformity of the perovskite layer and damage caused to the substrate by excessive heating.

scholarly journals Numerical Modeling of Ink Widening and Coating Gap in Roll-to-Roll Slot-Die Coating of Solid Oxide Fuel Cell Electrolytic Layer

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2927
Author(s):  
Seongyong Kim ◽  
Jongsu Lee ◽  
Minho Jo ◽  
Changwoo Lee
Keyword(s):  
Coating Thickness ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Mean Square ◽  
Large Area ◽  
Functional Layer ◽  
Slot Die Coating ◽  
Flexible Devices ◽  
Roll To Roll ◽  
Slot Die

Slot-die coatings are advantageous when used for coating large-area flexible devices; in particular, the coating width can be controlled and simultaneous multi-layer coatings can be processed. To date, the effects of ink widening and the coating gap on the coating thickness have only been considered in a few studies. To this end, we developed two mathematical models to accurately estimate the coating width and thickness that consider these two effects. We used root mean square deviation (RMSD) to experimentally verify the developed method. When the coating gap was increased, the coating width increased and the coating thickness decreased. Experimental results showed that the estimated performances of the coating width and thickness models were as high as 98.46% and 95.8%, respectively. We think that the developed models can be useful for determining the coating conditions according to the ink properties to coat a functional layer with user-defined widths and thicknesses in both lab- and industrial-scale roll-to-roll slot-die coating processes.

scholarly journals Roll-to-roll slot-die coating of 400 mm wide, flexible, transparent Ag nanowire films for flexible touch screen panels

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Dong-Ju Kim ◽  
Hae-In Shin ◽  
Eun-Hye Ko ◽  
Ki-Hyun Kim ◽  
Tae-Woong Kim ◽  
...  
Keyword(s):  
Touch Screen ◽  
Slot Die Coating ◽  
Roll To Roll ◽  
Slot Die ◽  
Ag Nanowire

scholarly journals Silver nanoparticle piezoresistive sensors fabricated by roll-to-roll slot-die coating and laser direct writing

2014 ◽  
Vol 22 (8) ◽  
pp. 8919 ◽  
Author(s):  
Hyungman Lee ◽  
Dongjin Lee ◽  
Junghwan Hwang ◽  
Dongil Nam ◽  
Changwan Byeon ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Slot Die Coating ◽  
Piezoresistive Sensors ◽  
Roll To Roll ◽  
Slot Die
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