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Edberg, J., Malti, A., Granberg, H., Hamedi, M. M., Crispin, X., Engquist, I. & Berggren, M. (2017). Electrochemical circuits from ‘cut and stick’ PEDOT:PSS-nanocellulose composite. Flexible and printed electronics, 4(2), Article ID 045010.
Open this publication in new window or tab >>Electrochemical circuits from ‘cut and stick’ PEDOT:PSS-nanocellulose composite
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2017 (English)In: Flexible and printed electronics, E-ISSN 2058-8585, Vol. 4, no 2, article id 045010Article in journal (Refereed) Published
Abstract [en]

We report a flexible self-standing adhesive composite made from PEDOT:PSS and nanofibrillated cellulose. The material exhibits good combined mechanical and electrical characteristics(an elastic modulus of 4.4 MPa, and an electrical conductivity of 30 S cm−1 ). The inherent self-adhesiveness of the material enables it to be laminated and delaminated repeatedly to form and reconfigure devices and circuits. This modular property opens the door for a plethora of applications where reconfigurability and ease-of-manufacturing are of prime importance. We also demonstrate a paper composite with ionic conductivity and combine the two materials to construct electrochemical devices, namely transistors, capacitors and diodes with high values of transconductance, charge storage capacity and current rectification. We have further used these devices to construct digital circuits such as NOT, NAND and NOR logic.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2017
Keywords
organic electronics, PEDOT, nanocellulose, organic electrochemical transistors, supercapacitors, composites, flexible electronics
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-145181 (URN)10.1088/2058-8585/aa8027 (DOI)2-s2.0-85041011470 (Scopus ID)
Available from: 2018-02-13 Created: 2018-02-13 Last updated: 2019-01-09Bibliographically approved
Malti, A., Edberg, J., Granberg, H., Ullah Khan, Z., Andreasen, J. W., Liu, X., . . . Berggren, M. (2016). An Organic Mixed Ion–Electron Conductor for Power Electronics. Advanced Science, Article ID 1500305.
Open this publication in new window or tab >>An Organic Mixed Ion–Electron Conductor for Power Electronics
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2016 (English)In: Advanced Science, ISSN 2198-3844, article id 1500305Article in journal (Refereed) Published
Abstract [en]

A mixed ionic–electronic conductor based on nanofibrillated cellulose composited with poly(3,4-ethylene-dioxythio­phene):­poly(styrene-sulfonate) along with high boiling point solvents is demonstrated in bulky electrochemical devices. The high electronic and ionic conductivities of the resulting nanopaper are exploited in devices which exhibit record values for the charge storage capacitance (1F) in supercapacitors and transconductance (1S) in electrochemical transistors.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2016
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-123225 (URN)10.1002/advs.201500305 (DOI)000370336500011 ()
Note

Funding agencies:  Knut and Alice Wallenberg foundation [KAW 2011.0050]; Onnesjo Foundation; Advanced Functional Materials Center at Linkoping University; Stiftelsen for strategisk forskning (SSF); RISE Research Institutes of Sweden; U.S. National Science Foundation [DMR-12

Available from: 2015-12-08 Created: 2015-12-08 Last updated: 2018-02-15
Ullah Khan, Z., Edberg, J., Max Hamedi, M., Gabrielsson, R., Granberg, H., Wågberg, L., . . . Crispin, X. (2016). Thermoelectric Polymers and their Elastic Aerogels. Advanced Materials, 28(22), 4556-4562
Open this publication in new window or tab >>Thermoelectric Polymers and their Elastic Aerogels
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2016 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 28, no 22, p. 4556-4562Article in journal (Refereed) Published
Abstract [en]

Electronically conducting polymers constitute an emerging class of materials for novel electronics, such as printed electronics and flexible electronics. Their properties have been further diversified to introduce elasticity, which has opened new possibility for "stretchable" electronics. Recent discoveries demonstrate that conducting polymers have thermoelectric properties with a low thermal conductivity, as well as tunable Seebeck coefficients - which is achieved by modulating their electrical conductivity via simple redox reactions. Using these thermoelectric properties, all-organic flexible thermoelectric devices, such as temperature sensors, heat flux sensors, and thermoelectric generators, are being developed. In this article we discuss the combination of the two emerging fields: stretchable electronics and polymer thermoelectrics. The combination of elastic and thermoelectric properties seems to be unique for conducting polymers, and difficult to achieve with inorganic thermoelectric materials. We introduce the basic concepts, and state of the art knowledge, about the thermoelectric properties of conducting polymers, and illustrate the use of elastic thermoelectric conducting polymer aerogels that could be employed as temperature and pressure sensors in an electronic-skin.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH, 2016
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:liu:diva-129660 (URN)10.1002/adma.201505364 (DOI)000377123500029 ()26836440 (PubMedID)
Note

Funding Agencies|European Research Council (ERC) [307596]; Swedish Foundation for Strategic Research; Knut and Alice Wallenberg Foundation; Swedish Energy Agency; Advanced Functional Materials Center at Linkoping University; Research Institute of Sweden (RISE)

Available from: 2016-06-27 Created: 2016-06-23 Last updated: 2018-09-07
Malti, A., Edberg, J., Granberg, H., Khan, Z. U., Andreasen, J. W., Liu, X., . . . Berggren, M. (2015). Enabling organic power electronics with a cellulose nano-scaffold.
Open this publication in new window or tab >>Enabling organic power electronics with a cellulose nano-scaffold
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2015 (English)Manuscript (preprint) (Other academic)
Abstract [en]

Exploiting the nanoscale properties of certain materials enables the creation of new materials with a unique set of properties. Here, we report on an electronic (and ionic) conducting paper based on cellulose nanofibrils (CNF) composited with poly(3,4-ethylene-dioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS), which may be facilely processed into large three-dimensional geometries, while keeping unprecedented electronic and ionic conductivities of 140 S/cm and 20 mS/cm, respectively. This is achieved by cladding the CNF with PEDOT:PSS, and trapping an ion-transporting phase in the interstices between these nanofibrils. The unique properties of the resulting nanopaper composite have been used to demonstrate (electrochemical) transistors, supercapacitors and conductors resulting in exceptionally high device parameters, such as an associated transconductance, charge storage capacity and current level beyond 1 S, 1 F and 1 A, respectively.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-122021 (URN)
Available from: 2015-10-16 Created: 2015-10-16 Last updated: 2018-02-15Bibliographically approved
Brill, J. W., Shahi, M., Payne, M. M., Edberg, J., Yao, Y., Crispin, X. & Anthony, J. E. (2015). Frequency-dependent photothermal measurement of transverse thermal diffusivity of organic semiconductors. Journal of Applied Physics, 118(23), 235501
Open this publication in new window or tab >>Frequency-dependent photothermal measurement of transverse thermal diffusivity of organic semiconductors
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2015 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 118, no 23, p. 235501-Article in journal (Refereed) Published
Abstract [en]

We have used a photothermal technique, in which chopped light heats the front surface of a small (similar to 1 mm(2)) sample and the chopping frequency dependence of thermal radiation from the back surface is measured with a liquid-nitrogen-cooled infrared detector. In our system, the sample is placed directly in front of the detector within its dewar. Because the detector is also sensitive to some of the incident light, which leaks around or through the sample, measurements are made for the detector signal that is in quadrature with the chopped light. Results are presented for layered crystals of semiconducting 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pn) and for papers of cellulose nanofibrils coated with semiconducting poly(3,4-ethylene-dioxythiophene): poly (styrene-sulfonate) (NFC-PEDOT). For NFC-PEDOT, we have found that the transverse diffusivity, smaller than the in-plane value, varies inversely with thickness, suggesting that texturing of the papers varies with thickness. For TIPS-pn, we have found that the interlayer diffusivity is an order of magnitude larger than the in-plane value, consistent with previous estimates, suggesting that low-frequency optical phonons, presumably associated with librations in the TIPS side groups, carry most of the heat. (C) 2015 AIP Publishing LLC.

Place, publisher, year, edition, pages
AMER INST PHYSICS, 2015
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-124495 (URN)10.1063/1.4937565 (DOI)000367376600058 ()
Note

Funding Agencies|National Science Foundation [DMR-1262261]; Office of Naval Research [N00014-11-0328]; Knut and Alice Wallenberg foundation (Power Paper project) [KAW 2011.0050]

Available from: 2016-02-02 Created: 2016-02-01 Last updated: 2018-02-15
Khan, Z. U., Edberg, J., Hamedi, M., Gabrielsson, R., Granberg, H., Engquist, I., . . . Crispin, X. (2015). Nanofibrillated cellulose aerogels functionalized with conducting polymers for thermoelectric and dual-sensing applications.
Open this publication in new window or tab >>Nanofibrillated cellulose aerogels functionalized with conducting polymers for thermoelectric and dual-sensing applications
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2015 (English)Manuscript (preprint) (Other academic)
Abstract [en]

Large amount of heat is wasted in industries, power generation plants and ordinary household appliances. This waste heat, can be a useful input to a thermoelectric generator (TEG) that can convert it to electricity. Conducting polymers (CPs) have been proved as best suited thermoelectric (TE) materials for lower temperatures, being not toxic, abundant in nature and solution processible. So far, CPs have been characterized as thin films, but it needs the third dimension to realize vertical TEGs which is possible by coating it on low thermal conductivity 3D skeletons. In this work, porous bulk cellulose structures have been used as a supporting material and were coated with CPs in various ways. The blend of cellulose and polymer were also freeze-dried, resulting in conducting and soft composites. Those flexible aerogels were utilized as a dual parameter sensor to sense pressure and temperature, based on the concept of thermoelectricity. It opens another application area of sensing, utilizing the thermoelectric phenomenon beyond the prevailing power generation concept. The sensitivity of such materials can be enhanced to make them useful as electronic skin in healthcare and robotics.

National Category
Physical Sciences Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-121981 (URN)
Available from: 2015-10-14 Created: 2015-10-14 Last updated: 2018-02-15Bibliographically approved
Khan, A., Edberg, J., Nur, O. & Willander, M. (2014). A novel investigation on carbon nanotube/ZnO, Ag/ZnO and Ag/carbon nanotube/ZnO nanowires junctions for harvesting piezoelectric potential on textile. Journal of Applied Physics, 116(3), 034505
Open this publication in new window or tab >>A novel investigation on carbon nanotube/ZnO, Ag/ZnO and Ag/carbon nanotube/ZnO nanowires junctions for harvesting piezoelectric potential on textile
2014 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 116, no 3, p. 034505-Article in journal (Refereed) Published
Abstract [en]

In the present work, three junctions were fabricated on textile fabric as an alternative substrate for harvesting piezoelectric potential. First junction was formed on ordinary textile as (textile/multi-walled carbon nanotube film/zinc oxide nanowires (S1: T/CNTs/ZnO NWs)) and the other two were formed on conductive textile with the following layer sequence: conductive textile/zinc oxide nanowires (S2: CT/ZnO NWs) and conductive textile/multi-walled carbon nanotubes film/zinc oxide nanowires (S3: CT/CNTs/ZnO NWs). Piezoelectric potential was harvested by using atomic force microscopy in contact mode for the comparative analysis of the generated piezoelectric potential. ZnO NWs were synthesized by using the aqueous chemical growth method. Surface analysis of the grown nanostructures was performed by using scanning electron microscopy and transmission electron microscopy. The growth orientation and crystalline size were studied by using X-ray diffraction technique. This study reveals that textile as an alternative substrate have many features like cost effective, highly flexible, nontoxic, light weight, soft, recyclable, reproducible, portable, wearable, and washable for nanogenerators fabrication with acceptable performance and with a wide choice of modification for obtaining large amount of piezoelectric potential.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2014
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-110489 (URN)10.1063/1.4890306 (DOI)000340710500083 ()
Available from: 2014-09-15 Created: 2014-09-12 Last updated: 2018-02-15Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2904-7238

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