Nanostructuring and nanocharacterisation of organic semiconductor devices. This research project will utilise new approaches to pattern organic solar cells on the nanoscale to realise improved efficiencies and improved understanding of device operation. It will also develop soft x-ray techniques to probe the nanostructure of organic semiconductor films with increased chemical and interfacial specificity.
Using anisotropic thermal expansion in organic semiconductor thin films. This project aims to capitalise upon the recent discovery of negative thermal expansion in high-performance organic semiconductor films. Certain molecules’ chemical structures have a planar conjugated core and flexible sidechains. When highly anisotropic thermal expansion occurs, the sidechains take up most of the thermal expansion. When a negative thermal expansion occurs, the pi-pi stacking distance decreases upon anneali ....Using anisotropic thermal expansion in organic semiconductor thin films. This project aims to capitalise upon the recent discovery of negative thermal expansion in high-performance organic semiconductor films. Certain molecules’ chemical structures have a planar conjugated core and flexible sidechains. When highly anisotropic thermal expansion occurs, the sidechains take up most of the thermal expansion. When a negative thermal expansion occurs, the pi-pi stacking distance decreases upon annealing. This effect has been linked with higher charge mobilities, and a tighter molecular packing is locked in upon cooling. The potential applications of these high performance organic semiconductors includes chemical/biosensors, electronic paper, and radio frequency identification cards.Read moreRead less
Aggregation control for high-performance polymer electronics. This project aims to exploit the behaviour of semiconducting polymer chains in solution to realise high-performance polymer electronics. This project will be achieved through a combination of simulation, theory, and X-ray measurements of solution-phase chain conformation and device studies. The project expects to create new predictive understanding of how the self organisation of semiconducting polymer chains determines thin-film micr ....Aggregation control for high-performance polymer electronics. This project aims to exploit the behaviour of semiconducting polymer chains in solution to realise high-performance polymer electronics. This project will be achieved through a combination of simulation, theory, and X-ray measurements of solution-phase chain conformation and device studies. The project expects to create new predictive understanding of how the self organisation of semiconducting polymer chains determines thin-film microstructure and thus charge transport in thin-film devices. Expected outcomes include new materials and processes for high-performance polymer transistors and enhanced interdisciplinary research partnerships. This approach should hasten the development of new technologies based on lightweight flexible electronic devices.Read moreRead less