Inkjet Printing of Conductive Inks with High Lateral Resolution on Omniphobic “R F Paper” for Paper-Based Electronics and MEMS (original) (raw)
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Roll-to-roll printed electronics on paper
New low cost, intelligent products with novel functionalities, e.g., sensors and simple displays have recently received much attention in the research community. For these types of products to come into everyday use, devices with reasonable electrical performance and negligible production cost are required. One way to reduce the manufacturing cost is to fabricate the electronics on inexpensive paper substrates by using roll-to-roll techniques ("Paper Electronics"), as an alternative to conventional electronics manufactured with batch processes on glass or polymer film substrates. The current work discusses printing of electronics on paper and demonstrates, as a proof-of-concept, a hygroscopic insulator field effect transistor device, a hydrogen sulfide sensor, ion selective electrodes and electrochemical pixels printed on paper with a custom-built roll-to-roll hybrid printer.
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The present work explores the effects of paper properties on conventional silver-based conducting inks. The effects of smoothness, relative humidity, porosity, permeability and wettability on electrical properties of silver inks on different paper substrates were studied. Another objective of this work was to prepare and study polyaniline synthesized in the presence of different lignosulfonates.
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Flexible plastic substrates are widely used in printed electronics; however, they cause major climate impacts and pose sustainability challenges. In recent years, paper-based electronics has been studied to increase the recyclability and sustainability of printed electronics. The aim of this paper is to analyze the printability and performance of metal conductor layers on different paper-based substrates using both flexography and screen printing and to compare the achieved performance with that of plastic foils. In addition, the re-pulpability potential of the used paper-based substrates is evaluated. As compared to the common polyethylene terephthalate (PET) substrate, the layer conductivity on paper-based substrates was found to be improved with both the printing methods without having a large influence on the detail rendering. This means that a certain surface roughness and porosity is needed for the improved ink transfer and optimum ink behavior on the surface of the substrate....
Paper Substrates for Printed Electronics
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The present work explores the effects of paper properties on conventional silver-based conducting inks. The effects of smoothness, relative humidity, porosity, permeability and wettability on electrical properties of silver inks on different paper substrates were studied. Another objective of this work was to prepare and study polyaniline synthesized in the presence of different lignosulfonates.
Recent Advancements in Functionalized Paper-Based Electronics
Building electronic devices on ubiquitous paper substrates has recently drawn extensive attention due to its light weight, low cost, environmental friendliness, and ease of fabrication. Recently, a myriad of advancements have been made to improve the performance of paper electronics for various applications, such as basic electronic components, energy storage devices, generators, antennas, and electronic circuits. This review aims to summarize this progress and discuss different perspectives of paper electronics as well as the remaining challenges yet to be overcome in this field. Other aspects included in this review are the fundamental characteristics of paper, modification of paper with functional materials, and various methods for device fabrication.
Advanced Electronic Materials, 2017
it reduces the production costs and finds application in many electronic devices like thin-film transistors (TFT), passive electronic components, energy-storage devices, and microelectromechanical systems (MEMS). [1,5,7,8] TFTs are one of the most basic and yet important elements of the modern day electronic. [9-12] The inkjet printing is a known deposition technology for manufacturing TFTs in the field of flexible and printed electronics. [13-17] The technology offers various advantages, such as additive printing process ability, accuracy in micrometer range, and flexibility in terms of material processing. [13,18-21] Due to its advantages, the technology has opened wider scope thus replacing the traditional metal subtractive etching/ lithographic as well as sputtering/e-beam evaporation technologies in large-area and flexible substrates. [22,23] These technologies are expensive and complicated, need specific equipment and impose strict process requirements. At the same time, depending on the field of application the paperbased electronics can be manufactured using photolithography, screen printing, gravure printing, flexography, or direct-writing/ printing technologies. [21,24-29] In these mentioned printing techniques inks generally have higher viscosity and this property restricts them from the unwanted ink diffusion into the paper fibers. [24,30] Over the past decade, inkjet technology has been well recognized for the manufacturing of products that include "printing beyond colors." This micrometer-scale precise technology provides a straightforward approach toward judicious deposition of electronically functional material inks on various substrates over relatively large areas, for printed/flexible electronics. The technology promotes upscalability and has become a renowned process tool for fabricating electronic devices in the field of printed/flexible electronics. Here, the fabrication of printed thin-film transistors (TFT) on cheap coated paper substrate using inkjet technology is reported. For developing the TFT layer stack conductive nanoparticle inks, a polymeric dielectric ink and a p-type organic semiconductor ink are employed. The coating on the paper provides several advantages for fabrication process of TFTs; for example, control over ink spreading. This control of ink spreading can directly influence the fabrication of interdigitated source/drain (S/D) electrodes for TFTs, when a top gate bottom contact architecture is considered. This results in better manufacturing yields and promising electrical performance, which are also the focus of this research. The all inkjet-printed TFTs on paper exhibit electrical performance with maximum S/D current ranging to 170 nA, charge carrier mobility of 0.087 cm 2 V −1 s −1 , and current on/off ratio of 330.