Non-plannar, Nano-Structured Hybrid Devices for Large Area Lighting


Supervisors: Dr Martyn McLachlan and Dr Alasdair Campbell
Sponsor: Plastic Electronics Doctoral Training Centre (PE-DTC)
Start: October 2011


OLEDs are a core area of plastic electronics. Of particular current interest is the field of large-area OLED lighting. This has reinvigorated the OLED community, involving a paradigm shift away from the pixilation of devices and the need for separated red, green and blue emitting materials, and allowing the development of new device architectures and device concepts. It also targets an area that is crucial to the UK and the rest of the world i.e. energy reduction and the implementation of a low carbon economy. This project involves a cutting-edge hybrid device concept, which we believe will have a serious impact on the development of this technology.

Nanostructured hybrid inorganic-organic LEDs (HyLEDs) will be fabricated using electron transporting metal oxides (ZnO) combined with both organic small molecules and conjugated polymers. ZnO is low cost and can be formed in a wide variety of structures from solution. Only recently has it been possible to control the growth and tailor the shape, dimensions and aspect ratio of high surface-area-to-volume ratio nanostructures. Here we propose to use vertically aligned ZnO nanorod arrays to fabricate next generation HyLEDs with a very large internal / external surface area ratio, potentially providing high intensity lighting. Our objectives are to fabricate single and multiple organic layer nanorod HyLEDs, to incorporate higher bandgap metal oxide layers (e.g. molybedenum, tungsten), and to develop large area (10cmx10cm) devices. The use of metal nanoparticle inks and crosslinkable polymers will allow the development of fully solution-processed nanorod HyLEDs. Additionally, Jorge will spend time at the University of Florida fabricating vacuum sublimed small molecule nanorod HyLEDs, and at Oak Ridge National Laboratory conducting nanoscale structural studies. Crosslinkable polymers and new conducting metal inks from colleagues and collaborators will be tested in these devices

PRIZES

Best poster prize at the 6th Society for Information Display Organic Electronics UK meeting 2012
Best poster prize at the Department of materials Postgraduate Research Day 2014

PRESENTATIONS

Poster presentation (poster prize) at the 6th Society for Information Display Organic Electronics UK meeting 2012