L402
Polyfluorene Conjugated Polymers for Optoelectronics
D.D.C. Bradley
Department of Physics and Astronomy, & Centre for Molecular Materials,
The University of Sheffield
Polyfluorene homo- and co-polymers synthesised via Suzuki coupling reactions are emerging as a very attractive class of conjugated polymer for applications in optoelectronics. These materials can be prepared as high molecular weight polymers with high charge carrier mobilities (10-3 cm2/Vs), high photoluminescence emission efficiency (50%) and good thermal stability. They demonstrate well-behaved thermotropic mesophase formation and can be aligned on orienting substrates to produce anisotropic samples that yield well-polarised emission. This paper will report recent work undertaken in Sheffield as part of a collaboration with the Dow Chemical Company. Studies of absorption and emission as a function of the physical state of order (amorphous, glassy liquid crystalline and crystalline thin films and samples containing different chain conformations) will be presented. Time of flight mobility measurements will also be discussed. Device performance of polyfluorene LEDs and other devices will be presented.
Return to Program.