A flexible large-area triboelectric generator by low-cost roll-to-roll process for location-based monitoring

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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Recent advances in flexible perovskite solar cells

Chemical Communications ◽

10.1039/c5cc03666f ◽

2015 ◽

Vol 51 (79) ◽

pp. 14696-14707 ◽

Cited By ~ 62

Author(s):

B. Susrutha ◽

Lingamallu Giribabu ◽

Surya Prakash Singh

Keyword(s):

Thin Film ◽

Solar Cells ◽

Solar Cell ◽

Low Cost ◽

Perovskite Solar Cells ◽

Large Area ◽

Roll To Roll ◽

Recent Developments ◽

Reduced Dimension ◽

Thin Film Photovoltaics

Flexible thin-film photovoltaics facilitate the implementation of solar devices into portable, reduced dimension, and roll-to-roll modules. In this review, we describe recent developments in the fabrication of flexible perovskite solar cells that are low cost and highly efficient and can be used for the fabrication of large-area and lightweight solar cell devices.

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Numerical Study on the Optimization of Roll-to-Roll Ultraviolet Imprint Lithography

Coatings ◽

10.3390/coatings9090573 ◽

2019 ◽

Vol 9 (9) ◽

pp. 573

Author(s):

Usama Tahir ◽

Muhammad Ahmad Kamran ◽

Myung Yung Jeong

Keyword(s):

Numerical Model ◽

Numerical Study ◽

Low Cost ◽

Industrial Applications ◽

Contact Angles ◽

Large Area ◽

Flexible Displays ◽

Roll To Roll ◽

Area Functional ◽

Uv Resin

Roll-to-roll ultraviolet (R2R-UV) imprinting is a low-cost and high-throughput method that includes the manufacturing of large-area functional films. However, the quality of the final product is obstructed by the bubble entrapment during the imprinting process. In this study, a multi-phase volume of fluid (VOF) numerical model was used to remove bubble entrapment during the R2R imprinting process, which covered all parameters. This new modified numerical model with open-channel boundary conditions was based on the single zone that contains the direct contact of UV resin with the imprinting mold during the filling process. In addition, this model simulated the UV resin filling into microcavities at the preceding and succeeding ends of the imprinting mold. Different patterns of imprinting mold were considered to enhance the fidelity of R2R-UV imprinting for the comprehensive analysis. The experimental results validated through numerical simulations revealed that the bubble entrapment can be controlled by varying various parameters such as speed of the imprinting system, viscosity, contact angles, and pattern shape. The proposed model may be useful for a continuous bubble-free R2R imprinting process in industrial applications that includes flexible displays and micro/nano-optics.

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Roll-to-Roll Nanoimprinting Metamaterials

MRS Proceedings ◽

10.1557/opl.2012.974 ◽

2012 ◽

Vol 1412 ◽

Cited By ~ 1

Author(s):

Anton Greenwald ◽

Jae Ryu ◽

Yisi Liu ◽

Rana Biswas ◽

Jong Ok ◽

...

Keyword(s):

Low Cost ◽

Aluminum Layer ◽

Large Area ◽

Coated Substrate ◽

Roll To Roll ◽

Flexible Polymer ◽

Fine Pattern ◽

Polymer Mold ◽

Continuous Fabrication ◽

Flexible Polymer Substrate

ABSTRACTWe investigated continuous fabrication of a large area 2-D metamaterial comprising a metal dot array on a dielectric coated substrate. We demonstrated patterning of metal dots arrays of varying patterns and shapes with diameter of about 2.5 μm and metal-to-metal spacing from 0.3 to 2.5 μm using a nano-imprinting stamp on a roller. The pattern was first fabricated on a standard photolithography mask, reproduced onto a silicon wafer master mold, and then transferred to a flexible polymer mold that was wrapped around a metal roller. The method was used to pattern a thin Al layer on top of SiO2 on a flexible polymer substrate. The aluminum was coated with a resist and the roller moved over the substrate with adjustable speed and pressure to imprint the fine pattern into the resist. The resist was cured, and a very thin layer of residual resist was removed by RIE, followed by a standard etching treatment for patterning the aluminum layer.The as-etched pattern had very few defects and the optical properties of the metamaterial were excellent and correlated well with simulations. This work has shown that low cost, rapid roll-to-roll processing of 2-D metamaterial structures is possible.

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Low-Cost and Large-Area Electronics, Roll-to-Roll Processing and Beyond

Subsecond Annealing of Advanced Materials - Springer Series in Materials Science ◽

10.1007/978-3-319-03131-6_14 ◽

2014 ◽

pp. 271-295 ◽

Cited By ~ 1

Author(s):

Katarzyna Wiesenhütter ◽

Wolfgang Skorupa

Keyword(s):

Low Cost ◽

Large Area ◽

Roll To Roll ◽

Large Area Electronics

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A wet- and dry-process feasible carbazole type host for highly efficient phosphorescent OLEDs

Journal of Materials Chemistry C ◽

10.1039/c5tc02889b ◽

2015 ◽

Vol 3 (47) ◽

pp. 12297-12307 ◽

Cited By ~ 30

Author(s):

Jwo-Huei Jou ◽

Snehasis Sahoo ◽

Sudhir Kumar ◽

Hui-Huan Yu ◽

Po-Hsun Fang ◽

...

Keyword(s):

High Performance ◽

Low Cost ◽

Organic Light Emitting Diodes ◽

Large Area ◽

Light Emitting ◽

Organic Layers ◽

Dry Process ◽

Type Host ◽

Roll To Roll ◽

Organic Light

A wet- and dry-process feasible host material is crucial to realize, respectively, low cost roll-to-roll fabrication of large area and high performance organic light-emitting diodes (OLEDs) with precise deposition of organic layers.

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Large Area Microcontact Printing Presses for Plastic Electronics

MRS Proceedings ◽

10.1557/proc-846-dd7.3 ◽

2004 ◽

Vol 846 ◽

Cited By ~ 2

Author(s):

Hee Hyun Lee ◽

Etienne Menard ◽

Nancy G. Tassi ◽

John A. Rogers ◽

Graciela B. Blanchet

Keyword(s):

High Resolution ◽

High Speed ◽

Microcontact Printing ◽

Low Cost ◽

Manufacturing Processes ◽

Flexible Substrates ◽

Large Area ◽

Plastic Electronics ◽

Roll To Roll ◽

Micron Size

ABSTRACTLow cost fabrication is key to the successful introduction of organic electronics and roll to roll manufacturing processes. We propose here that extending flexography into the micron size resolution regime may provide an economical commercialization path for plastic devices. Flexography is a high-speed technique commonly used for printing onto very large area flexible substrates.[1] Although low resolution and poor registration are characteristics of today's flexographic process, it has many similarities with soft lithographic techniques. This work shows that large, (12”×12”) high-resolution printing plates appropriate for use on small tag and label flexographic presses can be prepared using simple and inexpensive flexographic compatible processes. We illustrate the use of these plates for three representative soft lithographic processes: microcontact printing, replica molding, and phase shift lithography.

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Facile graphene transfer directly to target substrates with a reusable metal catalyst

Nanoscale ◽

10.1039/c5nr03892h ◽

2015 ◽

Vol 7 (36) ◽

pp. 14807-14812 ◽

Cited By ~ 17

Author(s):

D. L. Mafra ◽

T. Ming ◽

J. Kong

Keyword(s):

Flexible Electronics ◽

Chemical Etching ◽

Low Cost ◽

Metal Catalyst ◽

Scale Production ◽

Large Area ◽

High Quality ◽

Roll To Roll ◽

Graphene Transfer ◽

Industrial Scale Production

We explore a CVD transfer technique that abandons both the intermediate membrane and chemical etching of the metal catalyst. This method is fast, simple and is a necessary route towards roll-to-roll production of large-area CVD graphene sheets at high quality and low cost. Such integration is a step forward to the economical and industrial scale production of graphene and enables technology for flexible electronics and optoelectronics.

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An original flexible structure for Organic Photovoltaic Devices

MRS Proceedings ◽

10.1557/proc-814-i10.13 ◽

2004 ◽

Vol 814 ◽

Author(s):

Ornella Sanna ◽

Mario Cossu ◽

Tomas Pilia ◽

Annalisa Bonfiglio

Keyword(s):

Low Cost ◽

Organic Photovoltaic ◽

Flexible Substrates ◽

Photovoltaic Devices ◽

Organic Photovoltaic Devices ◽

Large Area ◽

Insulating Material ◽

Roll To Roll ◽

Supporting Layer ◽

Poly Ethylene

ABSTRACTA simple idea is proposed for the realization of organic photovoltaic devices on flexible substrates. According to this, a poly(ethylene terephtalate) layer (Mylar), transparent, a few micrometers thick and completely flexible, works as mechanical support. It is an insulating material, which has good mechanical and dielectric properties and, most important, it is completely transparent to ultraviolet light. For this reason it could be suitable for being used as transparent supporting layer for large area photovoltaic devices. Furthermore, its mechanical properties allow to employ it in a roll-to-roll lamination procedure that could give rise to low cost extended films carrying solar cells on the surface.

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Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

The European Physical Journal Applied Physics ◽

10.1051/epjap/2020190250 ◽

2020 ◽

Vol 90 (3) ◽

pp. 30502

Author(s):

Alessandro Fantoni ◽

João Costa ◽

Paulo Lourenço ◽

Manuela Vieira

Keyword(s):

Amorphous Silicon ◽

High Throughput Screening ◽

Simulation Analysis ◽

Low Cost ◽

Deposition Process ◽

Large Area ◽

Sidewall Roughness ◽

Sensing Applications ◽

Fabrication Defects ◽

The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

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