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Post-Deposition Polymerization: A Method for Circumventing Processing of Insoluble Conducting Polymers
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.ORCID-id: 0000-0002-0036-9911
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.ORCID-id: 0000-0002-4726-4121
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik.ORCID-id: 0000-0002-5496-9664
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(Engelska)Manuskript (preprint) (Övrig (populärvetenskap, debatt, mm))
Abstract [en]

A method, termed post-deposition polymerization, for the synthesis of conducting polymers is presented, which enables solid state polymerization of oligomeric layers by oxidative polymerization. The method was developed as a general tool for the preparation of conducting polymer layers that allows for industrially viable solution-processing methods to be used for substrate coating. We use trimer building blocks based on 3,4-ethylenedioxythiophene (EDOT) in the processing step, and show that the resulting trimer layer has innate conductivity when oxidized, which presumably is instrumental for successful polymerization of the solid layer. As judged by in situ conductance measurement during oxidative polymerization of the trimer layer, the layer-conductivity is greatly increased as a result of polymerization. Successful solid state polymerization was also confirmed by the irreversible spectral changes, monitored in-situ during polymerization, resulting in signature spectral transitions of conducting polymers from an initial spectrum derived solely from trimer absorption. From the in situ determined mass changes we estimate the swelling during post-deposition polymerization as well as the average polymer length. Electrochemical characterization of the resulting polymer show fast redox conversion as well as non-activated electron transport through the material indicating that the post-deposition polymerization-generated polymer indeed show promising properties. We believe that the post-deposition polymerization method will enable investigations, currently hampered by limited processability, of interesting families of conducting polymer materials.

Nyckelord [en]
Conducting Polymer, PEDOT, polymerization
Nationell ämneskategori
Nanoteknik
Forskningsämne
Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Identifikatorer
URN: urn:nbn:se:uu:diva-383028OAI: oai:DiVA.org:uu-383028DiVA, id: diva2:1314518
Tillgänglig från: 2019-05-09 Skapad: 2019-05-09 Senast uppdaterad: 2019-05-16
Ingår i avhandling
1. Electrochemical Characterizations of Conducting Redox Polymers: Electron Transport in PEDOT/Quinone Systems
Öppna denna publikation i ny flik eller fönster >>Electrochemical Characterizations of Conducting Redox Polymers: Electron Transport in PEDOT/Quinone Systems
2019 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Organic electrode materials for rechargeable batteries have caught increasing attention since they can be used in new innovative applications such as flexible electronics and smart fabrics. They can provide safer and more environmentally friendly devices than traditional batteries made from metals. Conducting polymers constitute an interesting class of organic electrode materials that have been thoroughly studied for battery applications. They have high conductivity but are heavy relative to their energy storage ability and will hence form batteries with low weight capacity. Quinones, on the other hand, are low weight molecules that participate in electron transport in both animals and plants. They could provide batteries with high capacity but are easily dissolved in the electrolyte and have low conductivity. These two constituents can be combined into a conducting redox polymer that has both high conductivity and high capacity. In the present work, the conducting polymer PEDOT and the simplest quinone, benzoquinone, are covalently attached and form the conducting redox polymer used for most studies in this thesis. The charge transport mechanism is investigated by in situ conductivity measurements and is found to mainly be governed by band transport. Other properties such as packing, kinetics, mass changes, and spectral changes are also studied. A polymerization technique is also analyzed, that allows for polymerization from a deposited layer. Lastly, two different types of batteries using conducting redox polymers are constructed. The thesis gives insight into the fundamental properties of conducting redox polymers and paves the way for the future of organic electronics.

Ort, förlag, år, upplaga, sidor
Uppsala: Acta Universitatis Upsaliensis, 2019. s. 59
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1819
Nyckelord
Conducting Redox Polymer, PEDOT, Quinone, Charge transport, Conductivity, Organic Battery
Nationell ämneskategori
Nanoteknik
Forskningsämne
Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Identifikatorer
urn:nbn:se:uu:diva-383026 (URN)978-91-513-0674-2 (ISBN)
Disputation
2019-08-30, Häggsalen, 10132, Ångström, Lägerhyddsvägen 1, Uppsala, 09:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2019-06-10 Skapad: 2019-05-09 Senast uppdaterad: 2019-08-23

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Sterby, MiaStrietzel, ChristianEmanuelsson, RikardStrömme, MariaSjödin, Martin

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