Direct Roll-to-Roll Coating of Catalyst-Coated Membranes for Low-Cost PEM Water Electrolyzers

A roll-to-roll compatible fabrication process of porous silicon (pSi) based sensing elements for a real-time humidity monitoring is described. The sensing elements, consisting of printed interdigitated silver electrodes and a spray-coated pSi layer, were fabricated on a coated paper substrate by a two-step process. Capacitive and resistive responses of the sensing elements were examined under different concentrations of humidity. More than a three orders of magnitude reproducible decrease in resistance was measured when the relative humidity (RH) was increased from 0% to 90%. A relatively fast recovery without the need of any refreshing methods was observed with a change in RH. Humidity background signal and hysteresis arising from the paper substrate were dependent on the thickness of sensing pSi layer. Hysteresis in most optimal sensing element setup (a thick pSi layer) was still noticeable but not detrimental for the sensing. In addition to electrical characterization of sensing elements, thermal degradation and moisture adsorption properties of the paper substrate were examined in connection to the fabrication process of the silver electrodes and the moisture sensitivity of the paper. The results pave the way towards the development of low-cost humidity sensors which could be utilized, for example, in smart packaging applications or in smart cities to monitor the environment.

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An Investigation onto Polydimethylsiloxane (PDMS) Printing Plate of Multiple Functional Solid Line by Flexographic

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.844.158 ◽

2013 ◽

Vol 844 ◽

pp. 158-161 ◽

Cited By ~ 3

Author(s):

M.I. Maksud ◽

Mohd Sallehuddin Yusof ◽

M. Mahadi Abdul Jamil

Keyword(s):

Laser Ablation ◽

Line Width ◽

High Speed ◽

Printed Electronics ◽

Low Cost ◽

Flexible Substrates ◽

Large Area ◽

Printing Plate ◽

Roll To Roll ◽

Printing Processes

Recently low cost production is vital to produce printed electronics by roll to roll manufacturing printing process like a flexographic. Flexographic has a high speed technique which commonly used for printing onto large area flexible substrates. However, the minimum feature sizes achieved with roll to roll printing processes, such as flexographic is in the range of fifty microns. The main contribution of this limitation is photopolymer flexographic plate unable to be produced finer micron range due to film that made by Laser Ablation Mask (LAMs) technology not sufficiently robust and consequently at micron ranges line will not be formed on the printing plate. Hence, polydimethylsiloxane (PDMS) is used instead of photopolymer. Printing trial had been conducted and multiple solid lines successfully printed for below fifty microns line width with no interference between two adjacent lines of the printed images.

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Chromogenics for Sustainable Energy: Some Advances in Thermochromics and Electrochromics

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.75.55 ◽

2010 ◽

Vol 75 ◽

pp. 55-64 ◽

Cited By ~ 3

Author(s):

Claes Goran Granqvist ◽

Sara V. Green ◽

Shu Yi Li ◽

N.R. Mlyuka ◽

Gunnar A. Niklasson ◽

...

Keyword(s):

Energy Efficient ◽

Recent Progress ◽

Large Temperature ◽

Electrochromic Devices ◽

Temperature Dependent ◽

Roll Coating ◽

Coloration Efficiency ◽

Roll To Roll ◽

External Stimuli ◽

Initial Results

Chromogenic materials are able to change their optical properties in response to external stimuli such as temperature (in thermochromic materials) and electrical charge insertion (in electrochromic materials). Below we review some recent advances for these types of materials. Specifically we first discuss the limitations of thermochromic VO2 films for energy efficient fenestration and show from calculations that nanocomposites containing VO2 can have superior properties and display high luminous transmittance and large temperature-dependent solar transmittance modulation. Even better results may be found for nanoparticles of VO2:Mg. In the second part of the paper we survey some recent progress for electrochromic devices and show that W oxide films have increased coloration efficiency when some Ni oxide is added. We also present initial results for flexible electrochromic foils produced by roll-to-roll coating and continuous lamination.

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Development of Nano Convergence Films Using a Roll-to-Roll Coating System

Transactions on Electrical and Electronic Materials ◽

10.4313/teem.2016.17.3.168 ◽

2016 ◽

Vol 17 (3) ◽

pp. 168-171

Author(s):

Joong Kook Hwang ◽

Sang-Mok Chang ◽

Hoon-Kyu Shin

Keyword(s):

Coating System ◽

Roll Coating ◽

Roll To Roll

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Flexible, Monolithically Integrated Cu(In,Ga)Se2 Thin-Film Solar Modules

MRS Proceedings ◽

10.1557/proc-865-f15.1 ◽

2005 ◽

Vol 865 ◽

Cited By ~ 10

Author(s):

Dirk Herrmann ◽

Friedrich Kessler ◽

Ulf Klemm ◽

Robert Kniese ◽

Theresa Magorian Friedlmeier ◽

...

Keyword(s):

Thin Film ◽

Production Process ◽

Low Cost ◽

Single Cells ◽

Production Method ◽

Flexible Substrates ◽

Metal Foil ◽

Monolithically Integrated ◽

Glass Substrates ◽

Roll To Roll

AbstractCIGS (Cu(In,Ga)Se2) thin-film solar modules on glass substrates are currently on the verge of commercialization. Entirely new application areas could be accessed with CIGS modules fabricated on thin and flexible non-glass substrates. Additionally, the roll-to-roll manufacturing of such flexible CIGS modules promises to be a low-cost production method. Different external Na supply methods and a vacuum-deposited buffer were investigated in this contribution, a sample of the challenges we face when modifying the standard, industrial CIGS module production process to the particular requirements of flexible substrates. Both metal foil substrates and polymer films are considered. Our excellent best results of above 14 % for single cells on titanium, more than 11% on polyimide, and around 7 % for modules on both substrates indicate our progress in developing flexible CIGS.

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Low cost, rigid to flex interposer using a spray coated intrinsically conductive polymer in a roll to-roll process

2014 IEEE 20th International Symposium for Design and Technology in Electronic Packaging (SIITME) ◽

10.1109/siitme.2014.6966987 ◽

2014 ◽

Cited By ~ 2

Author(s):

Indranil Bose ◽

Detlef Bonfert ◽

Sebastian Heim ◽

Karlheinz Bock

Keyword(s):

Low Cost ◽

Conductive Polymer ◽

Roll To Roll

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Roll-to-roll coating of flexible glass

Vakuum in Forschung und Praxis ◽

10.1002/vipr.201600613 ◽

2016 ◽

Vol 28 (4) ◽

pp. 40-44 ◽

Cited By ~ 2

Author(s):

Carsten Deus ◽

Jaroslava Salomon ◽

Uwe Wehner

Keyword(s):

Roll Coating ◽

Roll To Roll

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Roll-to-roll gravure-printed flexible perovskite solar cells using eco-friendly antisolvent bathing with wide processing window

Nature Communications ◽

10.1038/s41467-020-18940-5 ◽

2020 ◽

Vol 11 (1) ◽

Cited By ~ 1

Author(s):

Young Yun Kim ◽

Tae-Youl Yang ◽

Riikka Suhonen ◽

Antti Kemppainen ◽

Kyeongil Hwang ◽

...

Keyword(s):

Solar Cells ◽

Perovskite Phase ◽

Low Cost ◽

Perovskite Solar Cells ◽

Pilot Scale ◽

Butyl Alcohol ◽

Processing Window ◽

Roll To Roll ◽

Tert Butyl Alcohol ◽

Conversion Efficiencies

Abstract Driven by recent improvements in efficiency and stability of perovskite solar cells (PSCs), upscaling of PSCs has come to be regarded as the next step. Specifically, a high-throughput, low-cost roll-to-roll (R2R) processes would be a breakthrough to realize the commercialization of PSCs, with uniform formation of precursor wet film and complete conversion to perovskite phase via R2R-compatible processes necessary to accomplish this goal. Herein, we demonstrate the pilot-scale, fully R2R manufacturing of all the layers except for electrodes in PSCs. Tert-butyl alcohol (tBuOH) is introduced as an eco-friendly antisolvent with a wide processing window. Highly crystalline, uniform formamidinium (FA)-based perovskite formation via tBuOH:EA bathing was confirmed by achieving high power conversion efficiencies (PCEs) of 23.5% for glass-based spin-coated PSCs, and 19.1% for gravure-printed flexible PSCs. As an extended work, R2R gravure-printing and tBuOH:EA bathing resulted in the highest PCE reported for R2R-processed PSCs, 16.7% for PSCs with R2R-processed SnO2/FA-perovskite, and 13.8% for fully R2R-produced PSCs.

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