Digitala Vetenskapliga Arkivet

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  • 1.
    Andersson Ersman, Peter
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Boda, Ulrika
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Petsagkourakis, Ioannis
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Åhlin, Jessica
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Posset, Uwe
    Fraunhofer, Germany.
    Schott, Marco
    Fraunhofer, Germany.
    Brooke, Robert
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Reflective and Complementary Transmissive All-Printed Electrochromic Displays Based on Prussian Blue2023In: Advanced Engineering Materials, ISSN 1438-1656, E-ISSN 1527-2648, Vol. 25, no 6, article id 2201299Article in journal (Refereed)
    Abstract [en]

    By combining the electrochromic (EC) properties of Prussian blue (PB) and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), complementary EC displays manufactured by slot-die coating and screen printing on flexible plastic substrates are reported. Various display designs have been realized, resulting in displays operating in either transmissive or reflective mode. For the transmission mode displays, the color contrast is enhanced by the complementary switching of the two EC electrodes PB and PEDOT:PSS. Both electrodes are either exhibiting a concurrent colorless or blue appearance. For the displays operating in reflection mode, a white opaque electrolyte is used in conjunction with the EC properties of PB, resulting in a display device switching between a fully white state and a blue-colored state. The developments of the different device architectures, that either operate in reflection or transmission mode, demonstrate a scalable manufacturing approach of all-printed EC displays that may be used in a large variety of Internet of Things applications. © 2022 The Authors. 

  • 2.
    Boda, Ulrika
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Linköping University, Sweden.
    Petsagkourakis, Ioannis
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Beni, Valerio
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Andersson Ersman, Peter
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Tybrandt, Klas
    Linköping University, Sweden.
    Fully Screen-Printed Stretchable Organic Electrochemical Transistors2023In: Advanced Materials Technologies, E-ISSN 2365-709X, no 16, article id 2300247Article in journal (Refereed)
    Abstract [en]

    Stretchable organic electrochemical transistors (OECTs) are promising for wearable applications within biosensing, bio-signal recording, and addressing circuitry. Efficient large-scale fabrication of OECTs can be performed with printing methods but to date there are no reports on high-performance fully printed stretchable OECTs. Herein, this challenge is addressed by developing fully screen-printed stretchable OECTs based on an architecture that minimizes electrochemical side reactions and improves long-term stability. Fabrication of the OECTs is enabled by in-house development of three stretchable functional screen-printing inks and related printing processes. The stretchable OECTs show good characteristics in terms of transfer curves, output characteristics, and transient response up to 100% static strain and 500 strain cycles at 25% and 50% strain. The strain insensitivity of the OECTs can be further improved by strain conditioning, resulting in stable performance up to 50% strain. Finally, an electrochromic smart pixel is demonstrated by connecting a stretchable OECT to a stretchable electrochromic display. It is believed that the development of screen-printed stretchable electrochemical devices, and OECTs in particular, will pave the way for their use in wearable applications and commercial products. © 2023 The Authors. 

  • 3.
    Boda, Ulrika
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Linköping University, Sweden.
    Strandberg, Jan
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Eriksson, Jens
    Linköping University, Sweden.
    Liu, Xianjie
    Linköping University, Sweden.
    Beni, Valerio
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Tybrandt, Klas
    Linköping University, Sweden.
    Screen-Printed Corrosion-Resistant and Long-Term Stable Stretchable Electronics Based on AgAu Microflake Conductors2023In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 15, no 9, p. 12372-Article in journal (Refereed)
    Abstract [en]

    High-throughput production methods such as screen printing can bring stretchable electronics out of the lab into the market. Most stretchable conductor inks for screen printing are based on silver nanoparticles or flakes due to their favorable performance-to-cost ratio, but silver is prone to tarnishing and corrosion, thereby limiting the stability of such conductors. Here, we report on a cost-efficient and scalable approach to resolve this issue by developing screen printable inks based on silver flakes chemically coated by a thin layer of gold. The printed stretchable AgAu conductors reach a conductivity of 8500 S cm-1, remain conductive up to 250% strain, show excellent corrosion and tarnishing stability, and are used to demonstrate wearable LED and NFC circuits. The reported approach is attractive for smart clothing, as the long-term functionality of such devices is expected in a variety of environments. © 2023 The Authors.

  • 4.
    Cherian, Dennis
    et al.
    Linköping University, Sweden.
    Armgarth, Astrid
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Linköping University, Sweden.
    Beni, Valerio
    RISE - Research Institutes of Sweden (2017-2019), ICT, Acreo.
    Linderhed, Ulrika
    RISE - Research Institutes of Sweden (2017-2019), ICT, Acreo. Linköping University, Sweden.
    Tybrandt, Klas
    Linköping University, Sweden.
    Nilsson, David
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Simon, Daniel T
    Linköping University, Sweden.
    Berggren, Magnus
    Linköping University, Sweden.
    Large-area printed organic electronic ion pumps2019In: Flexible and Printed Electronics, Vol. 4, no 2Article in journal (Other academic)
    Abstract [en]

    Biological systems use a large variety of ions and molecules of different sizes for signaling. Precise electronic regulation of biological systems therefore requires an interface which translates the electronic signals into chemically specific biological signals. One technology for this purpose that has been developed during the last decade is the organic electronic ion pump (OEIP). To date, OEIPs have been fabricated by micropatterning and labor-intensive manual techniques, hindering the potential application areas of this promising technology. Here we show, for the first time, fully screen-printed OEIPs. We demonstrate a large-area printed design with manufacturing yield >90%. Screen-printed cation- and anion-exchange membranes are both demonstrated with promising ion selectivity and performance, with transport verified for both small ions (Na+, K+, Cl) and biologically-relevant molecules (the cationic neurotransmitter acetylcholine, and the anionic anti-inflammatory salicylic acid). These advances open the 'iontronics' toolbox to the world of printed electronics, paving the way for a broader arena for applications.

  • 5.
    Edberg, Jesper
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Boda, Ulrika
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Linköping University, Sweden.
    Mulla, Yusuf
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Brooke, Robert
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Pantzare, Sandra
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Strandberg, Jan
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Fall, Andreas
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Economou, Konstantin
    Linköping University, Sweden.
    Beni, Valerio
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Armgarth, Astrid
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    A Paper‐Based Triboelectric Touch Interface: Toward Fully Green and Recyclable Internet of Things2023In: Advanced Sensor Research, Vol. 2, no 1, article id 2200015Article in journal (Refereed)
    Abstract [en]

    The transition to a sustainable society is driving the development of green electronic solutions designed to have a minimal environmental impact. One promising route to achieve this goal is to construct electronics from biobased materials like cellulose, which is carbon neutral, non‐toxic, and recyclable. This is especially true for internet‐of‐things devices, which are rapidly growing in number and are becoming embedded in every aspect of our lives. Here, paper‐based sensor circuits are demonstrated, which use triboelectric pressure sensors to help elderly people communicate with the digital world using an interface in the form of an electronic “book”, which is more intuitive to them. The sensors are manufactured by screen printing onto flexible paper substrates, using in‐house developed cellulose‐based inks with non‐hazardous solvents. The triboelectric sensor signal, generated by the contact between a finger and chemically modified cellulose, can reach several volts, which can be registered by a portable microcontroller card and transmitted by Bluetooth to any device with an internet connection. Apart from the microcontroller (which can be easily removed), the whole system can be recycled at the end of life. A triboelectric touch interface, manufactured using printed electronics on flexible paper substrates, using cellulose‐based functional inks is demonstrated. These metal‐free green electronics circuits are implemented in an “electronic book” demonstrator, equipped with wireless communication that can control remote devices, as a step toward sustainable and recyclable internet‐of‐things devices.

  • 6.
    Linderhed, Ulrika
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Linköping University, Sweden.
    Petsagkourakis, Ioannis
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Linköping University, Sweden.
    Andersson Ersman, Peter
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Beni, Valerio
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Tybrandt, Klas
    Linköping University, Sweden.
    Fully screen printed stretchable electrochromic displays2021In: Flexible and Printed Electronics, ISSN 2058-8585, Vol. 6, no 4, article id 045014Article in journal (Refereed)
    Abstract [en]

    The advent of the Internet of Things and the growing interest in continuous monitoring by wearables have created a need for conformable and stretchable displays. Electrochromic displays (ECDs) are receiving attention as a cost-effective solution for many simple applications. However, stretchable ECDs have yet to be produced in a robust, large scale and cost-efficient manner. Here we develop a process for making fully screen printed stretchable ECDs. By evaluating commercially available inks with respect to electromechanical properties, including electrochromic PEDOT:PSS inks, our process can be directly applied in the manufacturing of stretchable organic electronic devices. The manufactured ECDs retained colour contrast with useful switching times at static strains up to 50% and strain cycling up to 30% strain. To further demonstrate the applicability of the technology, double-digit 7-segment ECDs were produced, which could conform to curved surfaces and be mounted onto stretchable fabrics while remaining fully functional. Based on their simplicity, robustness and processability, we believe that low cost printed stretchable ECDs can be easily scaled up and will find many applications within the rapidly growing markets of wearable electronics and the Internet of Things. © 2021 The Author(s). 

  • 7.
    Poxson, D J
    et al.
    Linköping University, Sweden.
    Gabrielsson, E O
    Linköping University, Sweden.
    Bonisoli, A
    Linköping University, Sweden; Istituto Italiano di Tecnologia, Italy; Sant'Anna School of Advanced Studies, Italy.
    Linderhed, Ulrika
    RISE - Research Institutes of Sweden (2017-2019), ICT, Acreo. Linköping University, Sweden.
    Abrahamsson, T
    Linköping University, Sweden.
    Matthiesen, I
    Linköping University, Sweden; KTH Royal Institute of Technology, Sweden.
    Tybrandt, K.
    Linköping University, Sweden.
    Berggren, M
    Linköping University, Sweden.
    Simon, D T
    Linköping University, Sweden.
    Capillary-Fiber Based Electrophoretic Delivery Device2019In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 11, no 15, p. 14200-14207Article in journal (Refereed)
    Abstract [en]

    Organic electronic ion pumps (OEIPs) are versatile tools for electrophoretic delivery of substances with high spatiotemporal resolution. To date, OEIPs and similar iontronic components have been fabricated using thin-film techniques and often rely on laborious, multistep photolithographic processes. OEIPs have been demonstrated in a variety of in vitro and in vivo settings for controlling biological systems, but the thin-film form factor and limited repertoire of polyelectrolyte materials and device fabrication techniques unnecessarily constrain the possibilities for miniaturization and extremely localized substance delivery, e.g., the greater range of pharmaceutical compounds, on the scale of a single cell. Here, we demonstrate an entirely new OEIP form factor based on capillary fibers that include hyperbranched polyglycerols (dPGs) as the selective electrophoretic membrane. The dPGs enable electrophoretic channels with a high concentration of fixed charges and well-controlled cross-linking and can be realized using a simple "one-pot" fluidic manufacturing protocol. Selective electrophoretic transport of cations and anions of various sizes is demonstrated, including "large" substances that are difficult to transport with other OEIP technologies. We present a method for tailoring and characterizing the electrophoretic channels' fixed charge concentration in the operational state. Subsequently, we compare the experimental performance of these capillary OEIPs to a computational model and explain unexpected features in the ionic current for the transport and delivery of larger, lower-mobility ionic compounds. From this model, we are able to elucidate several operational and design principles relevant to miniaturized electrophoretic drug delivery technologies in general. Overall, the compactness of the capillary OEIP enables electrophoretic delivery devices with probelike geometries, suitable for a variety of ionic compounds, paving the way for less-invasive implantation into biological systems and for healthcare applications.

  • 8.
    Sani, Negar
    et al.
    RISE - Research Institutes of Sweden (2017-2019), ICT, Acreo.
    Linderhed, Ulrika
    RISE - Research Institutes of Sweden (2017-2019), ICT, Acreo.
    Sandberg, Mats
    RISE - Research Institutes of Sweden (2017-2019), ICT, Acreo. Mid Sweden University, Sweden.
    Monolithically integrated electrochemical energy storage modules2018In: Journal of Energy Storage, ISSN 2352-152X, Vol. 16, p. 139-144Article in journal (Refereed)
    Abstract [en]

    The concept of monolithic integration of electrochemical energy storage modules was tested on serially connected supercapacitor cells balanced by passive resistive dissipation. Five electrode pairs with collectors, interconnects, corrosion protection layers, electrode material and shunt resistors were printed on a single substrate. The printed patterns, lamination film, and a hot-sealing tool were designed so that upon folding, lamination, and electrolyte filling and sealing, five serial cells were formed with each having a shunt resistance. In an open circuit idling period following charge and discharge, the standard deviation of the individual cell voltages decreased, demonstrating the balancing function of this so called “modulit”, a short term proposed for a monolithically integrated electrochemical energy storage module.

  • 9.
    Xiong, Kunli
    et al.
    Chalmers University of Technology, Sweden.
    Tordera, Daniel
    Linköping University, Sweden.
    Emilsson, Gustav
    Chalmers University of Technology, Sweden.
    Olsson, Oliver
    rdot AB, Sweden.
    Linderhed, Ulrika
    RISE - Research Institutes of Sweden (2017-2019), ICT, Acreo.
    Jonsson, Magnus P.
    Linköping University, Sweden.
    Dahlin, Andreas B.
    Chalmers University of Technology, Sweden.
    Switchable Plasmonic Metasurfaces with High Chromaticity Containing only Abundant Metals2017In: Nano Letters, ISSN 1530-6984, E-ISSN 1530-6992, Vol. 17, no 11, p. 7033-7039Article in journal (Refereed)
    Abstract [en]

    Plasmonic color generation offers several advantages but is also limited by the cost and availability of noble metals like gold. In this work, we present color-tunable metasurfaces with high chromaticity and reflectivity consisting of an aluminum mirror, a dielectric spacer, and a plasmonic nanohole array in copper. Copper is shown to be an excellent alternative to gold when properly protected from oxidation and makes it possible to generate a wide RGB gamut covering 27% of the standard RGB. By patterning the metasurfaces into microscale pixel triplets, color photos can be well reproduced with high resolution over wafer-sized areas. Further, we demonstrate active modulation of the reflected intensity using an electrochromic conductive polymer deposited on top of the nanostructures by screen printing. This technology opens up for ultrathin and flexible reflective displays in full color, that is, plasmonic electronic paper, compatible with large-scale sustainable production.

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