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Nanostructured networks of single wall carbon nanotubes for highly transparent, conductive, and anti-reflective flexible electrodes
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.ORCID-id: 0000-0002-3881-6764
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
2013 (engelsk)Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 103, nr 2, artikkel-id 021116Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Highly transparent, anti-reflective, flexible, and conductive electrodes are produced by nanopatterning of a polymer composite made of single wall carbon nanotubes (SWNTs). The formation of nanostructures creates interconnected nanotubes and vertically aligned SWNT networks which greatly improves charge transport compared to a traditionally mixed composite. These electrodes moreover possess high transparency (98% at 550 nm) and good anti-reflective properties. The use of low nanotube loadings provides an economical solution to make conductive and highly transparent flexible electrodes. The process used is simple and can be easily scaled to large areas by roll to roll processes.

sted, utgiver, år, opplag, sider
2013. Vol. 103, nr 2, artikkel-id 021116
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-79425DOI: 10.1063/1.4813498ISI: 000321761000016Scopus ID: 2-s2.0-84880483726OAI: oai:DiVA.org:umu-79425DiVA, id: diva2:645116
Tilgjengelig fra: 2013-09-03 Laget: 2013-08-19 Sist oppdatert: 2023-03-23bibliografisk kontrollert
Inngår i avhandling
1. Carbon nanotubes and graphene polymer composites for opto-electronic applications
Åpne denne publikasjonen i ny fane eller vindu >>Carbon nanotubes and graphene polymer composites for opto-electronic applications
2016 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Carbon nanotubes are carbon based structures with outstanding electronical and mechanical properties. They are used in a wide range of applications, usually embedded in polymer in the form of composites, in order to affect the electronic behavior of the matrix material. However, as the nanotubes properties are directly dependent on their intrinsic structure, it is necessary to select specific nanotubes depending on the application, which can be a complicated and inefficient process. This makes it attractive to be able to reduce the amount of material used in the composites.

In this thesis, focus is placed on the electrical properties of the composites. A simple patterning method is presented which allows the use of extremely low amounts of nanotubes in order to increase the electrical conductivity of diverse polymers such as polystyrene (PS) or poly(3-hexylthiophene) (P3HT). This method is called nanoimprint lithography and uses a flexible mold in order to pattern composite films, leading to the creation of conducting nanotube networks, resulting in vertically conducting samples (from the bottom of the film to the top of the imprinted patterns).

In parallel, X-ray diffraction measurements have been conducted on thin P3HT polymer films. These were prepared on either silicon substrate or on graphene, and the influence of the processing conditions as well as of the substrate on the crystallinity of the polymer have been investigated. The knowledge of the crystalline structure of P3HT is of great importance as it influences its electronic properties. Establishing a link between the processing conditions and the resulting crystallinity is therefore vital in order to be able to make opto-electronic devices such as transistor or photovoltaic cells.

sted, utgiver, år, opplag, sider
Umeå: Umeå universitet, 2016. s. 57
Emneord
carbon nanotubes, polythiophene, electrical conductivity, crystallography, graphene, nanoimprint lithography, synchrotron diffraction
HSV kategori
Forskningsprogram
fysik
Identifikatorer
urn:nbn:se:umu:diva-119779 (URN)978-91-7601-478-3 (ISBN)
Disputas
2016-06-01, KB3B1, KBC, Umeå, 10:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2016-05-11 Laget: 2016-04-27 Sist oppdatert: 2018-06-07bibliografisk kontrollert

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