Self-organized photonic structures in polymer light-emitting diodes

Abstract

The inclusion of self-organized, two-dimensional (2D) photonic structures with nanoscale topography within the emissive layer of polymer blends light-emitting diodes (LED) was investigated. The photonic structures were were analyzed by chemically patterning the poly(ethylene dioxythiophene) doped with polystyrene sulfonic acid (PEDOT/PSS) anode. The self-organization was achieved by spin-coating a polymer blend layer on top of a 2D pattern with a periodicity of 4μm. It was found that the vinyl terminated silane was used to provide sufficient contrast between the hydrophilic PEDOT/PSS, without creating a hydrophobic surface that resulted in the dewetting of the spincoated films.