An All‐Printed Ferroelectric Active Matrix Sensor Network Based on Only Five Functional Materials Forming a Touchless Control Interface

Zirkl, Martin; Sawatdee, Anurak; Helbig, Uta; Krause, Markus; Scheipl, Gregor; Kraker, Elke; Ersman, Peter Andersson; Nilsson, David; Platt, Duncan; Bodö, P.; Bauer, Siegfried; Domann, Gerhard; Stadlober, Barbara

doi:10.1002/adma.201100054

Cited by 224 publications

(189 citation statements)

References 21 publications

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“…2. Here, it should be noticed that all four sensor types show almost symmetrical hysteresis loops with saturation around 100 MV/m, giving a remanent polarization of about 70 mC/m 2 and a coercive field of about 50 MV/m, which are in good agreement with previous results reported for screen--printed 14 and spin coated 17 sensors. After removing the sensor from poling, it was kept for relaxation for at least 12 h to eliminate excess charge.…”

supporting

confidence: 92%

“…[1][2][3][4][5][6][7] Electrodes can also be attached to the film surface by various methods, as, for example, sputter coating, vapor deposition, and printing. 4,6,[9][10][11][12][13][14] Some of the printing methods (e.g., screen-printing, ink-jet printing, and laser ablation) also facilitate electrode printing directly onto the backing substrate, with a potential reduction in processing steps and fabrication time. [9][10][11][12][13][14] It was recently shown that the P(VDF-TrFE) material can be screen-printed in the fluid phase and integrated with screen-printed electrodes as an allprinted touch sensor that utilizes the material's pyroelectrical property.…”

mentioning

confidence: 99%

“…4,6,[9][10][11][12][13][14] Some of the printing methods (e.g., screen-printing, ink-jet printing, and laser ablation) also facilitate electrode printing directly onto the backing substrate, with a potential reduction in processing steps and fabrication time. [9][10][11][12][13][14] It was recently shown that the P(VDF-TrFE) material can be screen-printed in the fluid phase and integrated with screen-printed electrodes as an allprinted touch sensor that utilizes the material's pyroelectrical property. 14 The piezo-and pyro-electrical coefficients for screen-printed sensors were also found comparable to sensors made from conventional processing methods, 14 and the suggested printing method is therefore very attractive with respect to cost reduction and processing time, especially for the large area sensor industries.…”

mentioning

confidence: 99%

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Ultrasonic properties of all-printed piezoelectric polymer transducers

Wagle

Decharat

Bodö³

et al. 2013

Applied Physics Letters

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The ability of producing ultrasonic transducers from screen-printing has been explored experimentally, through printing and characterization of a large number of transducers. In an all-printed test design, 124 transducers with four different electrode sizes ranging from 1 to 4.9 mm2, were printed layer-by-layer on a high performance polyethyleneimine polymer. Inks from ferroelectric and conductive polymers were applied to the active part of a transducer, to provide a good acoustical match between the individual layers. Ultrasonic characterizations of the transducers done by two independent methods provided a broad-banded frequency response with a maximum response around 100 MHz.

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confidence: 92%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Ultrasonic properties of all-printed piezoelectric polymer transducers

Wagle

Decharat

Bodö³

et al. 2013

Applied Physics Letters

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“…The human‐body activity induced pressure is distributed in a large range from a low‐pressure regime to a high‐pressure regime (10–100 kPa) 83. Physiological activity in different positions of human body will generate differeent pressure signals.…”

Section: Recent Progress In Biomedical Applicationsmentioning

confidence: 99%

Recent Progress on Piezoelectric and Triboelectric Energy Harvesters in Biomedical Systems

et al. 2017

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Implantable medical devices (IMDs) have become indispensable medical tools for improving the quality of life and prolonging the patient's lifespan. The minimization and extension of lifetime are main challenges for the development of IMDs. Current innovative research on this topic is focused on internal charging using the energy generated by the physiological environment or natural body activity. To harvest biomechanical energy efficiently, piezoelectric and triboelectric energy harvesters with sophisticated structural and material design have been developed. Energy from body movement, muscle contraction/relaxation, cardiac/lung motions, and blood circulation is captured and used for powering medical devices. Other recent progress in this field includes using PENGs and TENGs for our cognition of the biological processes by biological pressure/strain sensing, or direct intervention of them for some special self‐powered treatments. Future opportunities lie in the fabrication of intelligent, flexible, stretchable, and/or fully biodegradable self‐powered medical systems for monitoring biological signals and treatment of various diseases in vitro and in vivo.

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“…Because the realization of a multicolor switch is preferred in the majority of their applications in displays, [4][5][6][7][8][9][10] various electrochromic materials including polymers, 11,12 small organic molecules 13,14 and metal-organic complexes, 15 and technologies aimed at multicolor switches have been intensively explored. Transition metals based on metal-organic complex multicolor electrochromic materials exhibit attractive properties, such as high stability and chemiluminescence.…”

Section: Introductionmentioning

confidence: 99%

A single-molecule multicolor electrochromic device generated through medium engineering

et al. 2015

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Multicolor organic electrochromic materials are important for the generation of full-color devices. However, achieving multiple colors using a single-molecule material has proved challenging. In this study, a multicolor electrochromic prototype device is generated by integrating medium engineering/in situ 'electro base'/laminated electrode technologies with the simple flying fish-shaped methyl ketone TM1. This multicolor electrochromic (green, blue and magenta) device is durable and has a high coloration efficiency (350 cm 2 C 21 ), a fast switching time (50 ms) and superior reversibility. This study is a successful attempt to integrate solvatochromism and basochromism in an electronic display. This integration not only introduces a new avenue for color tuning, in addition to the structural design of the colorant, but will also inspire further developments in the tuning of many other properties by this medium engineering approach, such as conductance and the redox property, and thereby accelerate versatile applications in data recording, ultrathin flexible displays, and optical communication and sensing. Keywords: electrochromic materials; laminated electrodes; microenvironment; multicolor devices; solvatochromic materials INTRODUCTION Owing to the increasing demand for low-power, ultrathin, flexible electronic displays, organic electrochromic materials 1-3 have become a research focus because of their distinct merits: low weight, high contrast, wide viewing angle, flexibility and the potential for low power consumption. Because the realization of a multicolor switch is preferred in the majority of their applications in displays, 4-10 various electrochromic materials including polymers, 11,12 small organic molecules 13,14 and metal-organic complexes, 15 and technologies aimed at multicolor switches have been intensively explored. Transition metals based on metal-organic complex multicolor electrochromic materials exhibit attractive properties, such as high stability and chemiluminescence. 16 However, the expense and scarcity of the precious metals, such as ruthenium, 15,16 osmium 17 and iridium, 18 limit their practical applications. Polymeric multicolor electrochromic materials with different electrochromic activation units [19][20][21] possess the advantages of easy processing, diverse resources and facile color tunability. However, some intrinsic problems, such as the lack of colorless states, poor transparency, poor color purity and complicated synthesis procedures, hinder their applications. Compared with electrochromic polymers, small organic color switches possess the advantages of low cost, good color purity, distinct transition from colorless to colored states and fine tunability of their photoelectronic properties via easy structure modifications. The lack of multicolor abilities is their intrinsic

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An All‐Printed Ferroelectric Active Matrix Sensor Network Based on Only Five Functional Materials Forming a Touchless Control Interface

Cited by 224 publications

References 21 publications

Ultrasonic properties of all-printed piezoelectric polymer transducers

Ultrasonic properties of all-printed piezoelectric polymer transducers

Recent Progress on Piezoelectric and Triboelectric Energy Harvesters in Biomedical Systems

A single-molecule multicolor electrochromic device generated through medium engineering

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