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  • 1.
    Andersson Ersman, Peter
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Westerberg, David
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Tu, Deyu
    Linköping University, Sweden.
    Nilsson, Marie
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Åhlin, Jessica
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Eveborn, Annelie
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Lagerlöf, Axel
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Nilsson, David
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Norberg, Petronella
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Berggren, Magnus
    Linköping University, Sweden.
    Forchheimer, Robert
    RISE - Research Institutes of Sweden, ICT, SICS.
    Gustafsson, Göran
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Screen printed digital circuits based on vertical organicelectrochemical transistors2017In: Flex. Print. Electron., Vol. 2, article id 045008Article in journal (Refereed)
    Abstract [en]

    Vertical organic electrochemical transistors (OECTs) have been manufactured solely using screenprinting. The OECTs are based on PEDOT:PSS (poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonic acid)), which defines the active material for both the transistor channel and the gateelectrode. The resulting vertical OECT devices and circuits exhibit low-voltage operation, relativelyfast switching, small footprint and high manufacturing yield; the last three parameters are explainedby the reliance of the transistor configuration on a robust structure in which the electrolyte verticallybridges the bottom channel and the top gate electrode. Two different architectures of the verticalOECT have been manufactured, characterized and evaluated in parallel throughout this report. Inaddition to the experimental work, SPICE models enabling simulations of standalone OECTs andOECT-based circuits have been developed. Our findings may pave the way for fully integrated, lowvoltageoperating and printed signal processing systems integrated with e.g. printed batteries, solarcells, sensors and communication interfaces. Such technology can then serve a low-cost basetechnology for the internet of things, smart packaging and home diagnostics applications.

  • 2.
    Blomsterberg, Åke
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Energiteknik (ET).
    Wahlström, Åsa
    Sandberg, Mats
    A pilot study of hybrid ventilation in Sweden2002In: Proceeding of Roomvent 2002, 8th International Conference on Air Distribution in Rooms, Copenhagen, Denmark, 2002Conference paper (Other academic)
  • 3.
    Blomsterberg, Åke
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Energiteknik (ET).
    Wahlström, Åsa
    Sandberg, Mats
    Hybrid ventilation in a retrofitted school - monitoring and evaluation of indoor climate andenergy2002In: Proceedings of Hybrid Ventilation2002. 4th International Forum, Concordia University, Montreal, Canada, 2002Conference paper (Other academic)
  • 4.
    Blomsterberg, Åke
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Energiteknik (ET).
    Wahlström, Åsa
    Sandberg, Mats
    Pilot study report: Tånga school, Falkenberg, Sweden2002Report (Refereed)
  • 5.
    Brooke, Robert
    et al.
    Linköping University, Sweden.
    Mitraka, Evangelie
    Linköping University, Sweden.
    Sardar, Samim
    Linköping University, Sweden.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo. Linköping University, Sweden.
    Sawatdee, Anurak
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Berggren, Magnus
    RISE - Research Institutes of Sweden, ICT, Acreo. Linköping University, Sweden.
    Crispin, Xavier
    Linköping University, Sweden.
    Jonsson, Magnus P.
    Linköping University, Sweden.
    Infrared electrochromic conducting polymer devices2017In: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 5, no 23, p. 5824-5830Article in journal (Refereed)
    Abstract [en]

    The conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) is well known for its electrochromic properties in the visible region. Less focus has been devoted to the infrared (IR) wavelength range, although tunable IR properties could enable a wide range of novel applications. As an example, modern day vehicles have thermal cameras to identify pedestrians and animals in total darkness, but road and speed signs cannot be easily visualized by these imaging systems. IR electrochromism could enable a new generation of dynamic road signs that are compatible with thermal imaging, while simultaneously providing contrast also in the visible region. Here, we present the first metal-free flexible IR electrochromic devices, based on PEDOT:Tosylate as both the electrochromic material and electrodes. Lateral electrochromic devices enabled a detailed investigation of the IR electrochromism of thin PEDOT:Tosylate films, revealing large changes in their thermal signature, with effective temperature changes up to 10 °C between the oxidized (1.5 V) and reduced (-1.5 V) states of the polymer. Larger scale (7 × 7 cm) vertical electrochromic devices demonstrate practical suitability and showed effective temperature changes of approximately 7 °C, with good optical memory and fast switching (1.9 s from the oxidized state to the reduced state and 3.3 s for the reversed switching). The results are highly encouraging for using PEDOT:Tosylate for IR electrochromic applications.

  • 6.
    Engholm, Magnus
    et al.
    Mid Sweden University, Sweden.
    Hammarling, Krister
    Mid Sweden University, Sweden.
    Andersson, Henrik
    Mid Sweden University, Sweden.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo. Mid Sweden University, Sweden.
    Nilsson, Hans Erik
    Mid Sweden University, Sweden.
    A bio-compatible fiber optic pH sensor based on a thin core interferometric technique2019In: Photonics, ISSN 2304-6732, Vol. 6, no 1, article id 11Article in journal (Refereed)
    Abstract [en]

    There is an increasing demand for compact, reliable and versatile sensor concepts for pH-level monitoring within several industrial, chemical as well as bio-medical applications. Many pH sensors concepts have been proposed, however, there is still a need for improved sensor solutions with respect to reliability, durability and miniaturization but also for multiparameter sensing. Here we present a conceptual verification, which includes theoretical simulations as well as experimental evaluation of a fiber optic pH-sensor based on a bio-compatible pH sensitive material not previously used in this context. The fiber optic sensor is based on a Mach-Zehnder interferometric technique, where the pH sensitive material is coated on a short, typically 20-25 mm thin core fiber spliced between two standard single mode fibers. The working principle of the sensor is simulated by using COMSOL Multiphysics. The simulations are used as a guideline for the construction of the sensors that have been experimentally evaluated in different liquids with pH ranging from 1.95 to 11.89. The results are promising, showing the potential for the development of bio-compatible fiber optic pH sensor with short response time, high sensitivity and broad measurement range. The developed sensor concept can find future use in many medical- or bio-chemical applications as well as in environmental monitoring of large areas. Challenges encountered during the sensor development due to variation in the design parameters are discussed. © 2019 by the authors.

  • 7.
    Erlandsson, Johan
    et al.
    KTH Royal Institute of Technology, Sweden.
    Lopez Duran, Verónica
    KTH Royal Institute of Technology, Sweden.
    Granberg, Hjalmar
    RISE, Innventia.
    Sandberg, Mats
    RISE, Swedish ICT, Acreo.
    Larsson, Per A.
    KTH Royal Institute of Technology, Sweden.
    Wågberg, Lars
    KTH Royal Institute of Technology, Sweden.
    Macro- and mesoporous nanocellulose beads for use in energy storage devices2016In: Applied Materials Today, ISSN 2352-9407, Vol. 5, p. 246-254Article in journal (Refereed)
    Abstract [en]

    Chemically cross-linked, wet-stable cellulose nanofibril (CNF) aerogel beads were fabricated using a novel procedure. The procedure facilitated controlled production of millimetre-sized CNF aerogel beads without freeze-drying or critical point drying, while still retaining a highly porous structure with low density. The aerogel beads were mechanically robust in the dry state, supporting loads of 1.3 N at 70% compression, even after being soaked in water and re-dried. Furthermore, they displayed both a good stability in water and a remarkably good shape recovery after wet compression. Owing to the stability in water, the entire surface of the highly porous aerogel beads could be successfully functionalized with polyelectrolytes and carboxyl-functionalized single-wall carbon nanotubes (CF-SWCNTs) using the Layer-by-Layer technique, introducing a significant electrical conductivity (1.6 mS/cm) to the aerogel beads. The functionalized, electrically conducting aerogel beads could carry as much as 2 kA/cm2 and act as electrodes in a supercapacitor displaying a stabilized charge storage capacity of 9.8 F/g after 50 charging–discharging cycles.

  • 8.
    Granberg, Hjalmar
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, Papermaking and Packaging.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Håkansson, Karl
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Pilot scale production of interactive zinc oxide paper and its multiple applicability2019In: PaperCon 2019: Proceedings, TAPPI Press, 2019, article id PF3.3Conference paper (Other academic)
    Abstract [en]

    A study has been made of the production of zinc oxide (ZnO) paper in a pilot paper machine. Bleached sulphate softwood pulp (70%) and bleached sulphate hardwood pulp (30%) were corefined. Cationic polyacrylamide (CPAM) was used as retention agent, while alkyl ketene dimer (AKD) was used as sizing agent for some samples. Some papers were screen printed with a conducting carbon-based ink to produce a photosensor device. Two methods were used to study the photocatalysis: immersing ZnO papers into kongo red dispersions or resazurin (Rz) based photocatalyst activity indicator ink and exposing the papers to ultraviolet (UV) light in a sunlight simulator. ZnO papers of approximately 60gsm were successfully produced on the pilot scale machine, which was run at a low speed (100m/min) and the retention of ZnO particles was good in all samples. The paper looked like an ordinary white printing paper product, but was a truly interactive material, exhibiting photoconductivity and enabling use as an excellent photosensor.

  • 9.
    Hammarling, Krister
    et al.
    Mid Sweden University, Sweden.
    Engholm, Magnus
    Mid Sweden University, Sweden.
    Andersson, Henrik
    Mid Sweden University, Sweden.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo. Mid Sweden University, Sweden.
    Nilsson, Hans Erik
    Mid Sweden University, Sweden.
    Broad-range hydrogel-based pH sensor with capacitive readout manufactured on a flexible substrate2018In: Chemosensors, ISSN 2227-9040, Vol. 6, no 3, article id 30Article in journal (Refereed)
    Abstract [en]

    Environmental monitoring of land, water and air, is an area receiving greater attention because of human health and safety concerns. Monitoring the type of pollution and concentration levels is vital, so that appropriate contingency plans can be determined. To effectively monitor the environment, there is a need for new sensors and sensor systems that suits these type of measurements. However, the diversity of sensors suitable for low, battery powered- and large area sensor systems are limited. We have manufactured and characterized a flexible pH sensor using laser processing and blade coating techniques that is able to measure pH between 2.94 and 11.80. The sensor consists of an interdigital capacitance with a pH sensitive hydrogel coating. Thin sensors can reach 95% of their final value value within 3 min, and are stable after 4 min. Good repeatability was achieved in regard to cycling of the sensor with different pH and multiple measurements from dry state. We have also studied the relation between an interdigital capacitance penetration depth and hydrogels expansion. We believe that our passive sensor is suitable to be used in low power and large area sensor networks.

  • 10.
    Hammarling, Krister
    et al.
    Mid Sweden University, Sweden.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo. Mid Sweden University, Sweden.
    Engholm, Magnus
    Mid Sweden University, Sweden.
    Andersson, Henrik
    Mid Sweden University, Sweden.
    Nilsson, Hans-Erik
    Mid Sweden University, Sweden.
    Synthesis, Curing Behavior and Swell Tests of pH-Responsive Coatings from Acryl-Terminated Oligo(beta-Amino Esters)2018In: Chemosensors, ISSN 2227-9040, Vol. 6, no 1, article id 10Article in journal (Refereed)
    Abstract [en]

    The ability of acryl-terminated oligo(beta-amino esters) (AOBAE) to be coated on fibers and printed electronics without solvents and to be cross-linked to a pH-responsive coatings, makes AOBAE-based coatings a potential type of pH-sensor coating. However, there are currently no reports of AOBAEs used as a pH-responsive coating material in sensor applications. Here we present an investigation of the synthesis, curing behavior and swell tests of AOBAEs. AOBAEs were synthesized from reacting an excess of asymmetric diacrylates with piperazine without the use of any solvents. They were then cross-linked to an insoluble network by UV-curing. Nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy were used to characterize the AOBAEs. NMR was used to clarify the irregular structure of the AOBAE. FTIR was used to monitor the effects of UV-curing dose and air exposure on monomer conversion during curing. An interferometric technique was used to monitor the swelling behavior of the coating in response to pH variations. Swell experiments showed that the AOBAE also responded to pH variations after polymerization. Therefore, AOBAE is an interesting class of material with potential use as a pH responsive coating in optical-and printed electronics pH-sensors applications.

  • 11. Herlogsson, L
    et al.
    Crispin, X
    Robinson, N D
    Sandberg, Mats
    RISE, Swedish ICT, Acreo.
    Hagel, O
    Gustafsson, G
    RISE, Swedish ICT, Acreo.
    Berggren, M
    Low-Voltage Polymer Field-Effect Transistors Gated Via a Proton Conductor2007In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 19, no 1, p. 97-Article in journal (Refereed)
    Abstract [en]

    Low operating voltages for p-channel organic field-effect transistors (OFETs) can be achieved by using an electrolyte as the gate insulator. However, mobile anions in the electrolyte can lead to undesired electrochemistry in the channel. In order to avoid this, a polyanionic electrolyte is used as the gate insulator. The resulting OFET has operating voltages of less than 1€‰V (see figure) shows fast switching (less than 0.3€‰ms) in ambient atmosphere._x000D_

  • 12. Kawahara, J
    et al.
    Andersson Ersman, Peter
    RISE, Swedish ICT, Acreo.
    Nilsson, D
    Katoh, K
    Nakata, Y
    Sandberg, Mats
    RISE, Swedish ICT, Acreo.
    Nilsson, M
    RISE, Swedish ICT, Viktoria.
    Gustafsson, G
    RISE, Swedish ICT, Acreo.
    Berggren, M
    Flexible active matrix addressed displays manufactured by printing coating techniques2013In: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 51, p. 265-71Article in journal (Refereed)
    Abstract [en]

    A flexible electrochromic active matrix addressed display, including 8 × 8 pixels, is demonstrated by using solution processing based on standard printing coating manufacturing techniques. Each organic electrochromic display (OECD) pixel its corresponding organic electrochemical transistor (OECT) are located on different sides of the flexible PET substrate. Electronic vias generated through the plastic substrate connects each OECD pixel with one addressing OECT. When comparing this display with actively addressed OECDs with all its components located on the same side, the present approach based on this electronic via substrate provides an enhanced pixel resolution a relatively more simplified manufacturing process._x000D_

  • 13.
    Keshmiri, Vahid
    et al.
    Linköping University, Sweden.
    Forchheimer, Robert
    Linköping University, Sweden.
    Tu, Deyu
    Linköping University, Sweden.
    Westerberg, David
    RISE, Swedish ICT, Acreo.
    Sandberg, Mats
    RISE, Swedish ICT, Acreo.
    The applications of OECTs in supercapacitor balancing circuits2016In: 2016 7th International Conference on Computer Aided Design for Thin-Film Transistor Technologies (CAD-TFT), 2016, p. 23-23, article id 7785048Conference paper (Refereed)
    Abstract [en]

    In this paper, we investigate using OECTs in differential amplifiers and cell voltage equalizers for supercapacitor balancing circuits. The differential amplifier based on OECTs can sense voltage difference and the voltage equalizer consisting of a microcontroller and OECTs can be used to charge supercapacitors to desired voltages.

  • 14.
    Keshmiri, Vahid
    et al.
    Linköping University, Sweden.
    Westerberg, David
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Andersson Ersman, Peter
    RISE - Research Institutes of Sweden, ICT.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Forchheimer, Robert
    Linköping University, Sweden.
    Tu, Deyu
    Linköping University, Sweden.
    A Silicon-Organic Hybrid Voltage Equalizer for Supercapacitor Balancing2017In: IEEE Journal on Emerging and Selected Topics in Circuits and Systems, ISSN 2156-3357, Vol. 7, no 1, p. 114-122, article id 7817802Article in journal (Refereed)
    Abstract [en]

    Cell voltage equalizers are an important part in electric energy storage systems comprising series-connected cells, for example, supercapacitors. Hybrid electronics with silicon chips and printed devices enables electronic systems with moderate performance and low cost. This paper presents a silicon-organic hybrid voltage equalizer to balance and protect series-connected supercapacitor cells during charging. Printed organic electrochemical transistors with conducting polymer poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) are utilized to bypass excess current when the supercapacitor cells are fully charged to desired voltages. In this study, low-cost silicon microcontrollers (ATtiny85) are programmed to sense voltages across the supercapacitor cells and control the organic electrochemical transistors to bypass charging current when the voltages exceed 1 V. Experimental results show that the hybrid equalizer with the organic electrochemical transistors works in dual-mode, switched-transistor mode or constant-resistor mode, depending on the charging current applied (0.3-100 mA). With the voltage equalizer, capacitors are charged equally regardless of their capacitances. This work demonstrates a low-cost hybrid solution for supercapacitor balancing modules at large-scale packs.

  • 15. Liu, J
    et al.
    Herlogsson, L
    Sawatdee, A
    RISE, Swedish ICT, Acreo.
    Favia, P
    Sandberg, Mats
    RISE, Swedish ICT, Acreo.
    Crispin, X
    Engquist, I
    Berggren, M
    Vertical Polyelectrolyte-Gated Organic Field-Effect Transistors2010In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 97, p. 103303-Article in journal (Refereed)
  • 16.
    Nour, E. S.
    et al.
    Linköping University, Sweden.
    Bondarevs, A.
    Linköping University, Sweden.
    Huss, P.
    Linköping University, Sweden.
    Sandberg, Mats
    RISE, Swedish ICT, Acreo. Linköping University, Sweden.
    Gong, S.
    Linköping University, Sweden.
    Willander, M.
    Linköping University, Sweden.
    Nur, O.
    Linköping University, Sweden.
    Low-Frequency Self-Powered Footstep Sensor Based on ZnO Nanowires on Paper Substrate2016In: Nanoscale Research Letters, ISSN 1931-7573, E-ISSN 1556-276X, Vol. 11, no 1, article id 156Article in journal (Refereed)
    Abstract [en]

    In this work, we design and fabricate a wireless system with the main operating device based on zinc oxide (ZnO) nanowires. The main operating device is based on piezoelectric nanogenerator (NG) achieved using ZnO nanowires grown hydrothermally on paper substrate. The fabricated NG is capable of harvesting ambient mechanical energy from various kinds of human motion, e.g., footsteps. The harvested electric output has been used to serve as a self-powered pressure sensor. Without any storage device, the signal from a single footstep has successfully triggered a wireless sensor node circuit. This study demonstrates the feasibility of using ZnO nanowire piezoelectric NG as a low-frequency self-powered sensor, with potential applications in wireless sensor networks.

  • 17.
    Sandberg, Mats
    et al.
    Linköping University, Sweden.
    Tordera, Daniel
    Linköping University, Sweden.
    Granberg, Hjalmar
    RISE, Innventia.
    Sawatdee, Anurak
    RISE, Swedish ICT, Acreo.
    Dedic, Dina
    RISE, Innventia.
    Berggren, Magnus
    Linköping University, Sweden.
    Jonsson, Magnus P.
    Linköping University, Sweden.
    Photoconductive zinc oxide-composite paper by pilot paper machine manufacturing2016In: Flexible and Printed Electronics, ISSN 2058-8585, Vol. 1, article id 044003Article in journal (Refereed)
    Abstract [en]

    Smartmaterials can be used for awide variety of applications, including sensing and energy harvesting.Implementation of smartmaterials in large area devices requires scalablemanufacturing. The use ofpaper-making techniques would offer an enormous production capacity, allowing for low-cost andlarge-scalemanufacturing. In thisworkwe present a successful pilot scale papermachinemanufacturingof functional composite papers(100mmin−1 with aweb width of 30 cm) based on cellulose fibres andcommercial tetrapodal zinc oxidemicrowhiskers(ZnO-Ts).Carbon electrodes could successfully beprinted on the paper to form complete electronic devices where the paper itself is the active material.Thisenabled development of aZnO-composite paper photosensor,where we characterized its stability,sensitivity and speed. The devices show excellent photosensing properties over awide range of lightirradiances(0.01–1Sun), including short response times (∼10 s) and long-term stability. Under simulatedsunlight and a bias voltage of 1 V, small(0.5 cm2) two-probe interdigitated photosensor devices provided12μAphotocurrent.Under the same conditions, four-probe measurements of the composite papershowed a sheet resistance of 6.9·107Ω/sq. Four-probe measurements also demonstrated that the paperconductivity varies linearlywith light irradiance. To the best of ourknowledge, this is thefirst example ofpilot paper machine production of an optoelectronic paper, demonstrating the potential for large-scalepapermanufacturing of active smart paper from low-cost industrial bulk materials.

  • 18.
    Sani, Negar
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Linderhed, Ulrika
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, 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.

  • 19. Tybrandt, K
    et al.
    Larsson, K C
     Kurup, S
    Simon, D T
    Kjäll, P
    RISE, Swedish ICT, Acreo.
    Isaksson, J
    Sandberg, Mats
    RISE, Swedish ICT, Acreo.
    Jager, E W H
    Dahlfors, Richter
    Berggren, M
    Translating Electronic Currents to Precise Acetylcholine-Induced Neuronal Signaling Using an Organic Electrophoretic Delivery Device2009In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 21, p. 4442-4446Article in journal (Refereed)
  • 20. ul Hasan, Kamran
    et al.
    Sandberg, Mats O
    RISE, Swedish ICT, Acreo.
    Nur, Omer
    Willander, Magnus
    Transparent Electrodes: ZnO/Polyfluorene Hybrid LED on an Efficient Hole-Transport Layer of Graphene Oxide Transparent Graphene Electrode2014In: Advanced Optical Materials, ISSN 2162-7568, E-ISSN 2195-1071, Vol. 2, no 4, p. 304-Article in journal (Refereed)
    Abstract [en]

    An rGO/GO/PFO/ZnO/Al LED is fabricated via simple solution-based techniques by K. ul Hasan Hasan . On page 326, they show how graphene can be a simple solution-processable substitute to PEDOT:PSS as an effective holetransport (electron-blocking) layer, ITO as a transparent conductive electrode in optoelectronic devices. The wide emission range of this LED opens up prospects for demonstrating white light-emitting devices from this novel combination. This could pave the way for cheaper displays._x000D_  _x000D_

  • 21. Xuan, Y
    et al.
    Sandberg, Mats
    RISE, Swedish ICT, Acreo.
    Berggren, M
    Crispin, X
    An all-polymer-air PEDOT battery2012In: Organic electronics, ISSN 1566-1199, E-ISSN 1878-5530, Vol. 13, p. 623-7Article in journal (Refereed)
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