Nanostructuring and properties of polymer surfaces with applications in energy
The integration of functional polymers in organic electronics has attracted great interest for their potential application in photovoltaics or diodes due to their characteristics such as high chemical tenability, low temperature processing, light weight and durability, among others. The incorporatio...
| Autor: | |
|---|---|
| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/22437 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/22437 |
| Access Level: | acceso abierto |
| Palabra clave: | 539.199(043.2) Polymers Polímeros Física de materiales |
| Sumario: | The integration of functional polymers in organic electronics has attracted great interest for their potential application in photovoltaics or diodes due to their characteristics such as high chemical tenability, low temperature processing, light weight and durability, among others. The incorporation of polymers into nowadays devices, that tend towards miniaturization, rises several challenges. In general, the macroscopic properties of polymers are closely related to their structure, that is hierarchical, from the nanometer to the millimeter scale. Hence, from a fundamental viewpoint, understanding the effect of the above mentioned miniaturization in the structure and physical phenomena would provide control over the properties of the nanoscaled polymer materials, helping in the design of new potential applications. In this Thesis we have attempted to fulfill the objective of preparing binary systems formed by pairs of functional polymers or pairs of organics materials, and understanding the modification of certain polymer properties when nanostructuring them, mainly in their surfaces. For the preparation of these binary systems we employed different methodologies: direct solution blending (Chapter 3, blends of donor/acceptor organic compounds, Chapter 4, blends of semiconducting and ferroelectric polymers), bilayer structures from semiconducting/ ferroelectric polymers, prepared by sequential spin coating (Chapter 4) and nanostructuring of a ferroelectric polymer in the form of nanospheres to be incorporated in a semiconducting polymer film (Chapter 4). In Chapter 3, the conduction mechanism and the molecular dynamics on a bulk heterojunction formed by a binary blend of donor/acceptor organic compounds have been studied by dielectric spectroscopy. In Chapter 4, the modification of the ferroelectric properties in poly(vinylidene fluoride- trifluoroethylene) copolymers due to nanostructuring and to the combination with a semiconducting polymer have been addressed by Piezoresponse force microscopy. Nanostructured functional polymer surfaces were prepared by laser techniques, mainly Laser Induced Periodic Surface Structures (LIPSS). In Chapter 5, we first report on the creation of LIPSS on a model polymer: polystyrene... |
|---|