Electroluminescence from Solution-Processed Pinhole-Free Nanometer-Thickness Layers of Conjugated Polymers.


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Type
Article
Change log
Authors
Newby, Carol 
Piachaud, Thomas H 
Jung, Seok-Heon 
Abstract

We report the formation of robust, reproducible, pinhole-free, thin layers of fluorinated polyfluorene conjugated copolymers on a range of polymeric underlayers via a simple solution processing method. This is driven by the different characters of the fluorinated and nonfluorinated sections of these polymers. Photothermal deflection spectroscopy is used to determine that these layers are 1-2 nm thick, corresponding to a molecularly thin layer. Evidence that these layers are continuous and pinhole-free is provided by electroluminescence data from polymer LED devices that incorporate these layers within the stacked LED structure. These reveal, remarkably, light emission solely from these molecularly thin layers.

Description
Keywords
Polymer monolayers, charge confinement, organic light-emitting diodes, orthogonal solvent processing, Electricity, Fluorenes, Halogenation, Light, Lighting, Luminescence, Luminescent Agents, Nanostructures, Nanotechnology, Polymers, Solutions
Journal Title
Nano Lett
Conference Name
Journal ISSN
1530-6984
1530-6992
Volume Title
18
Publisher
American Chemical Society (ACS)
Sponsorship
Engineering and Physical Sciences Research Council (EP/G060738/1)
EPSRC and NSF (MWN-0908994)